This page has only limited features, please log in for full access.

Unclaimed
Mugahed Amran
Department of Civil Engineering, Faculty of Engineering and IT, Amran University, Amran 9677, Yemen

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 26 August 2021 in Sustainability
Reads 0
Downloads 0

A cement paste or mortar is composed of a mineral skeleton with micron to millimeter-sized grains, surrounded by water filaments. The cohesion or shear resistance in the cement paste and mortar is caused by capillary forces of action. In the case of mortar mixes, there is friction between the particles. Therefore, the mortar mixture shows both friction between particles and cohesion, while the paste shows only cohesion, and the friction between particles is negligible. The property of the cement paste is greatly influenced by the rheological characteristics like cohesion and internal angle friction. It is also interesting that when studying the rheology of fresh concrete, the rheological behavior of cement paste and mortar has direct applicability. In this paper, the rheological characteristics of cement paste and mortar with and without mineral admixtures, that is, fly ash and ground granulated blast-furnace slag (GGBS), were studied. A cement mortar mix with a cement-to-sand ratio of 1:3 was investigated, including fly ash replacement from 10% to 40%, and GGBS from 10% to 70% of the weight of the cement. A suitable blend of fly ash, GGBS, and ordinary Portland cement (OPC) was also selected to determine rheological parameters. For mortar mixtures, the flow table was conducted for workability studies. The flexural and split tensile strength tests were conducted on various mortar mixtures for different curing times. The results indicate that in the presence of a mineral mixture of fly ash and GGBS, the rheological behavior of paste and mortar is similar. Compared with OPC-GGBS-based mixtures, both cement with fly ash and ternary mixtures show less shear resistance or impact resistance. The rheological behavior of the mortar also matches the rheological behavior in the flow table test. Therefore, it is easy to use the vane shear test equipment to conduct cohesion studies to understand the properties of cement paste and mortar using mineral admixtures. The strength results show that the long-term strength of GGBS-based mixtures and ternary mixed mixtures is better than that of fly-ash-based mixtures. For all mixtures, the strength characteristics are greatest at a w/b ratio of 0.6.

ACS Style

V. Arularasi; P. Thamilselvi; Siva Avudaiappan; Erick I. Saavedra Flores; Mugahed Amran; Roman Fediuk; Nikolai Vatin; Maria Karelina. Rheological Behavior and Strength Characteristics of Cement Paste and Mortar with Fly Ash and GGBS Admixtures. Sustainability 2021, 13, 9600 .

AMA Style

V. Arularasi, P. Thamilselvi, Siva Avudaiappan, Erick I. Saavedra Flores, Mugahed Amran, Roman Fediuk, Nikolai Vatin, Maria Karelina. Rheological Behavior and Strength Characteristics of Cement Paste and Mortar with Fly Ash and GGBS Admixtures. Sustainability. 2021; 13 (17):9600.

Chicago/Turabian Style

V. Arularasi; P. Thamilselvi; Siva Avudaiappan; Erick I. Saavedra Flores; Mugahed Amran; Roman Fediuk; Nikolai Vatin; Maria Karelina. 2021. "Rheological Behavior and Strength Characteristics of Cement Paste and Mortar with Fly Ash and GGBS Admixtures." Sustainability 13, no. 17: 9600.

Review
Published: 12 August 2021 in Sustainability
Reads 0
Downloads 0

A person spends most of his life in rooms built from various building materials; therefore, the optimization of the human environment is an important and complex task that requires interdisciplinary approaches. Within the framework of the new theory of geomimetics in the building science of materials, the concepts of technogenic metasomatism, the affinity of microstructures, and the possibilities of creating composites that respond to operational loads and can self-heal defects have been created. The article aims to introduce the basic principles of the science of geomimetics in terms of the design and synthesis of building materials. The study’s novelty lies in the concept of technogenic metasomatism and the affinity of microstructures developed by the authors. Novel technologies have been proposed to produce a wide range of composite binders (including waterproof and frost-resistant gypsum binders) using novel forms of source materials with high free internal energy. The affinity microstructures for anisotropic materials have been formulated, which involves the design of multilayered composites and the repair of compounds at three levels (nano-, micro-, macro-). The proposed theory of technogenic metasomatism in the building science of materials represents an evolutionary stage for composites that are categorized by their adaptation to evolving circumstances in the operation of buildings and structures. Materials for three-dimensional additive technologies in construction are proposed, and examples of these can be found in nature. Different ways of applying our concept for the design of building materials in future works are proposed.

ACS Style

Valery Lesovik; Roman Fediuk; Mugahed Amran; Nikolai Vatin; Roman Timokhin. Self-Healing Construction Materials: The Geomimetic Approach. Sustainability 2021, 13, 9033 .

AMA Style

Valery Lesovik, Roman Fediuk, Mugahed Amran, Nikolai Vatin, Roman Timokhin. Self-Healing Construction Materials: The Geomimetic Approach. Sustainability. 2021; 13 (16):9033.

Chicago/Turabian Style

Valery Lesovik; Roman Fediuk; Mugahed Amran; Nikolai Vatin; Roman Timokhin. 2021. "Self-Healing Construction Materials: The Geomimetic Approach." Sustainability 13, no. 16: 9033.

Review
Published: 30 July 2021 in Materials
Reads 0
Downloads 0

Development of sustainable concrete as an alternative to conventional concrete helps in reducing carbon dioxide footprint associated with the use of cement and disposal of waste materials in landfill. One way to achieve that is the use of fly ash (FA) as an alternative to ordinary Portland cement (OPC) because FA is a pozzolanic material and has a high amount of alumina and silica content. Because of its excellent mechanical properties, several studies have been conducted to investigate the use of alkali-activated FA-based concrete as an alternative to conventional concrete. FA, as an industrial by-product, occupies land, thereby causing environmental pollution and health problems. FA-based concrete has numerous advantages, such as it has early strength gaining, it uses low natural resources, and it can be configurated into different structural elements. This study initially presents a review of the classifications, sources, chemical composition, curing regimes and clean production of FA. Then, physical, fresh, and mechanical properties of FA-based concretes are studied. This review helps in better understanding of the behavior of FA-based concrete as a sustainable and eco-friendly material used in construction and building industries.

ACS Style

Mugahed Amran; Roman Fediuk; Gunasekaran Murali; Siva Avudaiappan; Togay Ozbakkaloglu; Nikolai Vatin; Maria Karelina; Sergey Klyuev; Aliakbar Gholampour. Fly Ash-Based Eco-Efficient Concretes: A Comprehensive Review of the Short-Term Properties. Materials 2021, 14, 4264 .

AMA Style

Mugahed Amran, Roman Fediuk, Gunasekaran Murali, Siva Avudaiappan, Togay Ozbakkaloglu, Nikolai Vatin, Maria Karelina, Sergey Klyuev, Aliakbar Gholampour. Fly Ash-Based Eco-Efficient Concretes: A Comprehensive Review of the Short-Term Properties. Materials. 2021; 14 (15):4264.

Chicago/Turabian Style

Mugahed Amran; Roman Fediuk; Gunasekaran Murali; Siva Avudaiappan; Togay Ozbakkaloglu; Nikolai Vatin; Maria Karelina; Sergey Klyuev; Aliakbar Gholampour. 2021. "Fly Ash-Based Eco-Efficient Concretes: A Comprehensive Review of the Short-Term Properties." Materials 14, no. 15: 4264.

Journal article
Published: 27 July 2021 in Materials
Reads 0
Downloads 0

This research aims to study the effect of the dosage of anhydrous sodium metasilicate activator on the long-term properties of fly ash-based one-part alkali-activated binders (OPAAB) cured at ambient conditions. Powdered sodium metasilicate activator was utilized in the range of 8–16% by weight of the fly ash in producing the OPAAB. The properties examined are hardened density, compressive strength, flexural strength, water absorption, efflorescence formation, and microstructural analysis. The experimental result revealed that the binders exhibited excellent long-term strength properties. The compressive strength of the OPAAP is well correlated with its hardened density. The pastes were found to exhibit good soundness characteristics over the long-term. The absorption of water decreases with an increase in the activator dosage from 8–12%, and beyond that, the water absorption relatively remains the same. Field emission scanning electron microscope (FESEM) micrograph revealed uniformly formed solid matrices with the micro-crack present were observed in the samples. The larger pore size promotes the crystallization of the resulting hydrate substances (N, C)-A-S-H gel. The initial dissolution of the OPAAP occurred within the first 30 min. At longer age of curing, mixtures with a higher dosage of powdered activator tend to absorb less water. Strength properties beyond 28 days are considered as the long-term strength.

ACS Style

Sani Haruna; Bashar Mohammed; Mohamed Wahab; Mubarak Kankia; Mugahed Amran; Abdurra’Uf Gora. Long-Term Strength Development of Fly Ash-Based One-Part Alkali-Activated Binders. Materials 2021, 14, 4160 .

AMA Style

Sani Haruna, Bashar Mohammed, Mohamed Wahab, Mubarak Kankia, Mugahed Amran, Abdurra’Uf Gora. Long-Term Strength Development of Fly Ash-Based One-Part Alkali-Activated Binders. Materials. 2021; 14 (15):4160.

Chicago/Turabian Style

Sani Haruna; Bashar Mohammed; Mohamed Wahab; Mubarak Kankia; Mugahed Amran; Abdurra’Uf Gora. 2021. "Long-Term Strength Development of Fly Ash-Based One-Part Alkali-Activated Binders." Materials 14, no. 15: 4160.

Review
Published: 25 June 2021 in Materials
Reads 0
Downloads 0

The urbanization process contributes to the growth of solid waste generation and causes an increase in environmental impacts and failures in the management of solid waste. The number of dumps is a concern due to the limited implementation and safe disposal of this waste. The interest in sustainable techniques has been growing in relation to waste management, which is largely absorbed by the civil construction sector. This work aimed to review plastic waste, especially polyethylene terephthalate (PET), that can be incorporated with construction materials, such as concrete, mortars, asphalt mixtures, and paving. The use of life-cycle assessment (LCA) is related, as a tool that allows the sustainability of products and processes to be enhanced in the long term. After analyzing the recent literature, it was identified that studies related to plastic wastes in construction materials concentrate sustainability around the alternative destination of waste. Since the plastic waste from different production chains are obtained, it was possible to affirm the need for a broader assessment, such as the LCA, providing greater quantification of data making the alternative processes and products more sustainable. The study contributes to enhance sustainability in alternative building materials through LCA.

ACS Style

Tulane da Silva; Afonso de Azevedo; Daiane Cecchin; Markssuel Marvila; Mugahed Amran; Roman Fediuk; Nikolai Vatin; Maria Karelina; Sergey Klyuev; Maciej Szelag. Application of Plastic Wastes in Construction Materials: A Review Using the Concept of Life-Cycle Assessment in the Context of Recent Research for Future Perspectives. Materials 2021, 14, 3549 .

AMA Style

Tulane da Silva, Afonso de Azevedo, Daiane Cecchin, Markssuel Marvila, Mugahed Amran, Roman Fediuk, Nikolai Vatin, Maria Karelina, Sergey Klyuev, Maciej Szelag. Application of Plastic Wastes in Construction Materials: A Review Using the Concept of Life-Cycle Assessment in the Context of Recent Research for Future Perspectives. Materials. 2021; 14 (13):3549.

Chicago/Turabian Style

Tulane da Silva; Afonso de Azevedo; Daiane Cecchin; Markssuel Marvila; Mugahed Amran; Roman Fediuk; Nikolai Vatin; Maria Karelina; Sergey Klyuev; Maciej Szelag. 2021. "Application of Plastic Wastes in Construction Materials: A Review Using the Concept of Life-Cycle Assessment in the Context of Recent Research for Future Perspectives." Materials 14, no. 13: 3549.

Journal article
Published: 23 June 2021 in Crystals
Reads 0
Downloads 0

The use of expanded clay aggregate (ECA) for developing lightweight concrete results in strength-reduction properties. However, the ECA-based concrete strength properties can be improved by adding steel fibre (SF), glass fibre mesh (GFM) and multi-walled nano-carbon tubes (MWCNT). The combined effect of MWCNT, GFM, SF and ECA-based concrete and its strength properties is still unexplored. It is worth drawing a logical conclusion concerning the impact on the strength of concrete by incorporating the materials mentioned above. Two-stage expanded clay aggregate fibrous concrete (TECAFC) is a new concrete type and an emerging research area in material engineering. The casting method of TECAFC includes the two essential phases as follows. First, ECA and fibres are filled into the empty cylindrical mould to develop a natural skeleton. Second, the grout comprising cement, sand and MWCNT, are injected into the developed skeleton to fill voids. In this research, eight mixtures were prepared with 0.1 and 0.2% of MWCNT, 2.5% dosage of SF and three different layers of GFM inserted between the two layers of concrete. These eight mixtures were divided into two series of three mixtures each, in addition to two reference mixtures that include no SF or GFM. The first series of mixtures was comprised of 0.1% of MWCNT and 2.5% of SF and one, two and three layers of GFM insertion. The second series was the same as the first series and the dosage of MWCNT was taken as 0.2%. All cylindrical specimens were tested under drop mass impact as per the suggestions made by the ACI Committee 544. The test results showed that incorporating steel fibres and GFM improved the cracking and failure impact resistance by more than 270 and 1100%, respectively, and increased the impact ductility index by more than 220%, significantly contributing to steel fibres.

ACS Style

Gunasekaran Murali; Sallal Abid; Mugahed Amran; Roman Fediuk; Nikolai Vatin; Maria Karelina. Combined Effect of Multi-Walled Carbon Nanotubes, Steel Fibre and Glass Fibre Mesh on Novel Two-Stage Expanded Clay Aggregate Concrete against Impact Loading. Crystals 2021, 11, 720 .

AMA Style

Gunasekaran Murali, Sallal Abid, Mugahed Amran, Roman Fediuk, Nikolai Vatin, Maria Karelina. Combined Effect of Multi-Walled Carbon Nanotubes, Steel Fibre and Glass Fibre Mesh on Novel Two-Stage Expanded Clay Aggregate Concrete against Impact Loading. Crystals. 2021; 11 (7):720.

Chicago/Turabian Style

Gunasekaran Murali; Sallal Abid; Mugahed Amran; Roman Fediuk; Nikolai Vatin; Maria Karelina. 2021. "Combined Effect of Multi-Walled Carbon Nanotubes, Steel Fibre and Glass Fibre Mesh on Novel Two-Stage Expanded Clay Aggregate Concrete against Impact Loading." Crystals 11, no. 7: 720.

Review
Published: 17 June 2021 in Crystals
Reads 0
Downloads 0

Currently, a number of disadvantages hampers the use of recycled concrete aggregates (RCA). The current review proves that concretes made with complete replacement of natural aggregate with RCA allow the production of high-quality concrete. One of the possibilities for improving concrete properties with RCA is the use of extended curing and pozzolanic materials with varying cement ratios. The potential use of RCA concretes is in the production of high-value materials that increase environmental and financial benefits. RCA have strong potential in the development of a new generation of concrete and stimulate economic activity in many countries in addition to optimizing natural resources. Economic benefits include minimal travel costs; cheaper sources of concrete than newly mined aggregates; reduction of the landfill area required for the placement of concrete waste; the use of RCA minimizes the need for gravel extraction, etc. The proposed strategy could be to sequentially separate demolition waste such as roof finishes, waterproof materials, interior and exterior materials, etc. Closing life cycles is the main approach used for efficient structures for the recycling and reuse of construction and demolition waste in the production and recovery of materials, especially when recycling and reusing materials. In the life cycle, the recycling of recovered materials allows them to be used for new construction purposes, avoiding the use of natural concrete aggregates. Government, design institutes, construction departments and project managers should be involved in the creation and use of RCA. In demolition and construction, the main players are the project owners. Their obligations, expectations and responsibilities must be properly aligned. For the past 20 years, recycled concrete aggregate from demolition and construction waste has been considered as an alternative to pure concrete in structural concrete to minimize the environmental impact of construction waste and demolition waste and the conversion of natural aggregate resources. It is now recognized that the use of RCA for the generations of concrete is a promising and very attractive technology for reducing the environmental impact of the construction sector and conserving natural resources. In the market, the selling price is not an obstacle for market applications of RCA, as there are scenarios in which their cost is lower than the cost of products made from conventional building materials. This is more of an acceptance factor in the market for recycled concrete aggregates. In this sector, the lack of identification, accreditation and uniform quality certification systems and their narrow application cause some marketing problems. With proper RCA preparation, concrete with standard physical and mechanical properties and performance characteristics can be obtained.

ACS Style

Natt Makul; Roman Fediuk; Mugahed Amran; Abdullah Zeyad; Sergey Klyuev; Irina Chulkova; Togay Ozbakkaloglu; Nikolai Vatin; Maria Karelina; Afonso Azevedo. Design Strategy for Recycled Aggregate Concrete: A Review of Status and Future Perspectives. Crystals 2021, 11, 695 .

AMA Style

Natt Makul, Roman Fediuk, Mugahed Amran, Abdullah Zeyad, Sergey Klyuev, Irina Chulkova, Togay Ozbakkaloglu, Nikolai Vatin, Maria Karelina, Afonso Azevedo. Design Strategy for Recycled Aggregate Concrete: A Review of Status and Future Perspectives. Crystals. 2021; 11 (6):695.

Chicago/Turabian Style

Natt Makul; Roman Fediuk; Mugahed Amran; Abdullah Zeyad; Sergey Klyuev; Irina Chulkova; Togay Ozbakkaloglu; Nikolai Vatin; Maria Karelina; Afonso Azevedo. 2021. "Design Strategy for Recycled Aggregate Concrete: A Review of Status and Future Perspectives." Crystals 11, no. 6: 695.

Journal article
Published: 03 June 2021 in Buildings
Reads 0
Downloads 0

In this research, a phase formation in CaO–SiO2–Al2O3–H2O binding system under hydrothermal conditions was studied. The novelty of this article lies in the quantitative full-profile X-ray diffraction (XRD) analysis used to determine kinetics of mineral formation in the binder system “lime–granite mineral modifier (GMM)”. The formation of a polymineral system is described in detail, as well as quantitative relationships between mineral composition of newly formed phases and the binding mixture ratios were determined. Phenomenological model of mineral formation in a “lime–GMM” system under hydrothermal conditions was proposed. The results obtained allow the demonstration of this binding system as a binder that is characterized by superposition of hydration and geopolymerization. The properties (strength, density, water absorption, porosity) of compressed autoclave-hardened materials with the addition of a granite modifier introduced instead of part of the sand as an aggregate have been studied. The maximum increase in strength (more than 50%) is observed at a modifier content of 15%. This is due to the formation of a rational composition of neoplasms, the compaction of the structure of the pressed products and the optimization of their pore space, which is confirmed by the data of X-ray diffraction analysis, scanning electron microscopy and the method of gas adsorption.

ACS Style

Viktoriya Nelubova; Valeria Strokova; Roman Fediuk; Mugahed Amran; Nikolai Vatin; Yuriy Vasilev. Effect of an Aluminosilicate Disperse Additive on Behaviors of Autoclave Silicate Materials. Buildings 2021, 11, 239 .

AMA Style

Viktoriya Nelubova, Valeria Strokova, Roman Fediuk, Mugahed Amran, Nikolai Vatin, Yuriy Vasilev. Effect of an Aluminosilicate Disperse Additive on Behaviors of Autoclave Silicate Materials. Buildings. 2021; 11 (6):239.

Chicago/Turabian Style

Viktoriya Nelubova; Valeria Strokova; Roman Fediuk; Mugahed Amran; Nikolai Vatin; Yuriy Vasilev. 2021. "Effect of an Aluminosilicate Disperse Additive on Behaviors of Autoclave Silicate Materials." Buildings 11, no. 6: 239.

Review
Published: 30 May 2021 in Buildings
Reads 0
Downloads 0

The global sustainable construction aimed to minimize the ecological impacts of constructed facilities’ lifetime. In construction, concretes are the major materials utilized in South East Asia. Thus, it makes environmental and economic sense to utilize recycled materials in the production of new concretes for diverse uses. This review indicated that the practical implementations of the recycled aggregate concretes (RAC) in the area is greatly lacking, even though there are reasonable studies on RAC, particularly because of lack awareness and economic viability of such uses at the present period. This research aims to establish an interdisciplinary consortium with researchers, policy makers, practitioners, and social scientists in Southeast Asia to investigate the development of sustainable, durable, cost-effective, green concrete by utilizing recycled aggregates. Concentrating on waste resource recovery, this research presents an integrated modeling method. The approaches track and forecast a variety of values across technical, economic, social, and environmental areas linking these to the material flow and therefore integrating and building upon one-dimensional models like life cycle assessments (LCAs) and material flow analyses (MFAs). Additionally, the analysis of this study supported the recycling of cement for general use in construction, emphasizing the feasibility, reliability, and longevity of a project at the same time. However, the analysis also demonstrated that although there is fair progress on recycled concrete, there is still a severe lack of appropriate development in particular because of the lack of economic sustainability and knowledge of such applications at present. Raw material conservations were recorded; carbon dioxide costs and footprint were also reduced. Considering the RAC economic, technical, and environmental parameters, frameworks were applied for sustainable selections with target compressive strengths as the major goal.

ACS Style

Natt Makul; Roman Fediuk; Mugahed Amran; Abdullah Zeyad; Afonso de Azevedo; Sergey Klyuev; Nikolai Vatin; Maria Karelina. Capacity to Develop Recycled Aggregate Concrete in South East Asia. Buildings 2021, 11, 234 .

AMA Style

Natt Makul, Roman Fediuk, Mugahed Amran, Abdullah Zeyad, Afonso de Azevedo, Sergey Klyuev, Nikolai Vatin, Maria Karelina. Capacity to Develop Recycled Aggregate Concrete in South East Asia. Buildings. 2021; 11 (6):234.

Chicago/Turabian Style

Natt Makul; Roman Fediuk; Mugahed Amran; Abdullah Zeyad; Afonso de Azevedo; Sergey Klyuev; Nikolai Vatin; Maria Karelina. 2021. "Capacity to Develop Recycled Aggregate Concrete in South East Asia." Buildings 11, no. 6: 234.

Journal article
Published: 21 April 2021 in Crystals
Reads 0
Downloads 0

Residential consumption dominates the energy expenditure of heating and cooling systems, especially in tropical climates where building envelopes play an important role in energy efficiency. The thermal properties of concrete that are commonly employed as the building envelope material affect directly human comfort in a building. In addressing both the concrete thermal performance and industrial waste issues, this paper experimentally studies the concrete compressive strength and thermal properties used later for comparative energy analysis for human comfort. Four design mixes and a conventional concrete as control specimen are considered utilizing industrial wastes; palm oil fly ash (POFA), lightweight expanded clay aggregate (LECA), oil palm shell (OPS), and quarry dust, as constituents. These mixes are cast for cube compressive strength (to ensure the achievement of structural concrete requirement) and small-scaled wall tests. The measurement of surface temperatures of scaled wall tests is conducted in a polystyrene box to determine the concrete time lag and decrement factor. It is found that the density of concrete governs the compressive strength and that air pockets in the concrete matrix play an essential role as far as the thermal properties are concerned. From the energy analysis, structural lightweight concrete may save approximately 50% of the residential energy consumption.

ACS Style

Yeong Lee; Nicholas Chua; Mugahed Amran; Yee Yong Lee; Ahmad Hong Kueh; Roman Fediuk; Nikolai Vatin; Yuriy Vasilev. Thermal Performance of Structural Lightweight Concrete Composites for Potential Energy Saving. Crystals 2021, 11, 461 .

AMA Style

Yeong Lee, Nicholas Chua, Mugahed Amran, Yee Yong Lee, Ahmad Hong Kueh, Roman Fediuk, Nikolai Vatin, Yuriy Vasilev. Thermal Performance of Structural Lightweight Concrete Composites for Potential Energy Saving. Crystals. 2021; 11 (5):461.

Chicago/Turabian Style

Yeong Lee; Nicholas Chua; Mugahed Amran; Yee Yong Lee; Ahmad Hong Kueh; Roman Fediuk; Nikolai Vatin; Yuriy Vasilev. 2021. "Thermal Performance of Structural Lightweight Concrete Composites for Potential Energy Saving." Crystals 11, no. 5: 461.

Journal article
Published: 09 April 2021 in Crystals
Reads 0
Downloads 0

Lime plaster mixes are becoming more and more popular in the world’s building materials market every year. Therefore, the issue of increasing the efficiency of lime finishing coatings is relevant. The paper aim is the modification of lime binders with specially synthesized calcium silicate hydrates (CSHs). To obtain the CSH filler, liquid sodium glass was used with a silicate module of 1.53–2.9 and a density of 1130–1663 kg/m3. Using differential thermal analysis (DTA), X-ray diffraction (XRD) patterns, synthesized calcium silicate hydrates, as well as dry plaster mixes, and finishing coatings based on using them were studied. The regularities of the filler synthesis were established depending on the temperature, density, and silicate modulus of liquid glass, the amount of the precipitant additive, the rate of its introduction, and the drying mode. As a result of processing the obtained experimental data, a mathematical model was obtained for the composition “lime + CSH”. The phase composition of the filler was revealed, which is characterized by the presence of calcium silicate hydrates of the tobermorite group, a solid solution CSH (B) in the form of a weakly crystallized gel, a solid solution of C–S–H (II), hydrohalites, and calcites. It was found that the use of the fillers into the lime compositions, obtained with the rapid introduction of CaCl2 additive into water glass during the synthesis of the filler, promotes the acceleration of the plastic strength gain of lime compositions. It was revealed that the lime composites with the CSH filler are characterized by reduced shrinkage deformations up to 45%. The introduction of the CSH filler into the lime compositions increases the water resistance of the lime finishing layer by 36%. A technological scheme for the production of the lime dry plaster mixes has been developed; it can be introduced at existing factories of building materials without significant re-equipment of production.

ACS Style

Valentina Loganina; Kristina Sergeeva; Roman Fediuk; Valery Uvarov; Nikolai Vatin; Yuriy Vasilev; Mugahed Amran; Maciej Szelag. Increase the Performances of Lime Finishing Mixes Due to Modification with Calcium Silicate Hydrates. Crystals 2021, 11, 399 .

AMA Style

Valentina Loganina, Kristina Sergeeva, Roman Fediuk, Valery Uvarov, Nikolai Vatin, Yuriy Vasilev, Mugahed Amran, Maciej Szelag. Increase the Performances of Lime Finishing Mixes Due to Modification with Calcium Silicate Hydrates. Crystals. 2021; 11 (4):399.

Chicago/Turabian Style

Valentina Loganina; Kristina Sergeeva; Roman Fediuk; Valery Uvarov; Nikolai Vatin; Yuriy Vasilev; Mugahed Amran; Maciej Szelag. 2021. "Increase the Performances of Lime Finishing Mixes Due to Modification with Calcium Silicate Hydrates." Crystals 11, no. 4: 399.

Journal article
Published: 24 March 2021 in Crystals
Reads 0
Downloads 0

Fiber-reinforced plastic (FRP) rebar has drawbacks that can limit its scope, such as poor heat resistance, decrease its strength over time, and under the influence of substances with an alkaline medium, as well as the drawback of a low modulus of elasticity and deformation. Thus, the aim of the article is the nano- and micro-modification of building reinforcing bars using FRP rebars made of basalt fibers, which were impregnated with a thermosetting polymer binder with micro- or nanoparticles. The research discusses the major results of the developed composite reinforcement with the addition of micro- and nanosized particles. The microstructure of FRP has been studied using scanning electron microscopy. It was revealed that dispersion-strengthened polymer composites with the inclusion of microsilica (SiO2) and nanosized aluminum oxide (Al2O3) particles have a much higher modulus of elasticity and strength when compared with the original polymer materials. In the course of the experiment, we also studied the retained plastic properties that are characterized by the absence of fragility. However, it was found that the high strength of materials was attained with a particle size of 10–500 nm, evenly distributed in the matrix, with an average distance between particles of 100–500 nm. It was also exhibited that composite reinforcement had improved the adhesion characteristics in comparison with both steel reinforcement (1.5–2 times, depending on the diameter), and with traditional unmodified FRP rebar (about 1.5 times). Thus, the use of micro-/nanosized powders increased the limit of the possible temperature range for the use and application of polymeric materials by almost two times, up to 286–320 °C, which will undoubtedly expand the range of the technological applications of products made of these materials.

ACS Style

Aleksandr Rudenko; Alexander Biryukov; Oleg Kerzhentsev; Roman Fediuk; Nikolai Vatin; Yuriy Vasilev; Sergey Klyuev; Mugahed Amran; Maciej Szelag. Nano- and Micro-Modification of Building Reinforcing Bars of Various Types. Crystals 2021, 11, 323 .

AMA Style

Aleksandr Rudenko, Alexander Biryukov, Oleg Kerzhentsev, Roman Fediuk, Nikolai Vatin, Yuriy Vasilev, Sergey Klyuev, Mugahed Amran, Maciej Szelag. Nano- and Micro-Modification of Building Reinforcing Bars of Various Types. Crystals. 2021; 11 (4):323.

Chicago/Turabian Style

Aleksandr Rudenko; Alexander Biryukov; Oleg Kerzhentsev; Roman Fediuk; Nikolai Vatin; Yuriy Vasilev; Sergey Klyuev; Mugahed Amran; Maciej Szelag. 2021. "Nano- and Micro-Modification of Building Reinforcing Bars of Various Types." Crystals 11, no. 4: 323.

Journal article
Published: 24 March 2021 in Construction and Building Materials
Reads 0
Downloads 0

Despite the fact that gypsum materials have many advantages, such as fast hardening, low cost, environmental friendliness, their field of application is limited by low values of compressive strength, water resistance and durability. An urgent task is to increase the efficiency of the gypsum composite through the use of Portland cement, as well as a natural and man-made waste. The novelty of the work lies in the identification of scientific regularities of the influence of industrial waste on the structure formation and properties of green gypsum-cement paste (GGCP). For the first time, the genesis and technogenesis of quartz in the waste of ferruginous quartzites is generalized and studied. The features of the formation of the structure and hardening of GGCP are studied taking into account the chemical, structural and morphological features of dehydrate gypsum, Portland cement and man-made waste of various genesis. Gypsum β-modification of the G-5B II grade and technogenic wastes were used as a binder component and mineral additives, respectively. The fresh properties and durability of the GGCP were studied according to standardized test methods. However, the influence of different fineness of grinding of components on the performances of GGCP was investigated. It was revealed that with a decrease in the fineness of concrete waste, from 200 to 600 m2/kg, the compressive strength significantly increases, 4 times. This is due to the fact that when concrete waste is ground; previously unhydrated cement particles are exposed, which undergo hydration later. It was revealed that the maximum compressive strength of 22 MPa of the GGCP is achieved at a specific surface area of 600 m2/kg, a further increase in the specific surface area would lead to a decrease in compressive strength, which is explained by an increase in water demand. As a result of research for two years, both in water and air, it was found that there were no signs of destruction and decrease in the strength of the specimens. In accordance with the experimental data obtained, a three-stage model of the structure formation of the GGCP with mineral additives of industrial waste was proposed.

ACS Style

Valery Lesovik; Natalia Chernysheva; Roman Fediuk; Mugahed Amran; G. Murali; Afonso R.G. de Azevedo. Optimization of fresh properties and durability of the green gypsum-cement paste. Construction and Building Materials 2021, 287, 123035 .

AMA Style

Valery Lesovik, Natalia Chernysheva, Roman Fediuk, Mugahed Amran, G. Murali, Afonso R.G. de Azevedo. Optimization of fresh properties and durability of the green gypsum-cement paste. Construction and Building Materials. 2021; 287 ():123035.

Chicago/Turabian Style

Valery Lesovik; Natalia Chernysheva; Roman Fediuk; Mugahed Amran; G. Murali; Afonso R.G. de Azevedo. 2021. "Optimization of fresh properties and durability of the green gypsum-cement paste." Construction and Building Materials 287, no. : 123035.

Review
Published: 26 February 2021 in Crystals
Reads 0
Downloads 0

Recycled concrete aggregates (RCA) are used in existing green building composites to promote the environmental preservation of natural coarse aggregates (NCA). Besides, the use of RCA leads to potential solutions to the social and economic problems caused by concrete waste. It is found that insufficient information on the longevity and sustainability of RCA production is a serious issue that requires close attention due to its impact on changing aspects of the sector. However, more attention has been paid to explaining the effect of RCA on concrete durability, as well as the properties of fresh and hardened concrete. Therefore, this study aims to provide a critical review on the RCAs for the production of high-performances concrete structures. It begins by reviewing the source, originality, types, prediction of service life, features and properties of RCA, as well as the effect of RCA on concrete performance. In addition, this literature review summarizes the research findings to produce complete insights into the potential applications of RCA as raw, renewable, and sustainable building materials for producing greener concrete composite towards industrializing ecofriendly buildings today. Further, it has also highlighted the differences in the current state of knowledge between RCAs and NCAs, and offers several future research suggestions. Through this critical and analytical study, it can be said that RCA has the possible use in the production of high-performance structural concrete depending on the source and type of recycled aggregate while the RCA can be used widely and safely to produce traditional green concrete.

ACS Style

Natt Makul; Roman Fediuk; Mugahed Amran; Abdullah Zeyad; Gunasekaran Murali; Nikolai Vatin; Sergey Klyuev; Togay Ozbakkaloglu; Yuriy Vasilev. Use of Recycled Concrete Aggregates in Production of Green Cement-Based Concrete Composites: A Review. Crystals 2021, 11, 232 .

AMA Style

Natt Makul, Roman Fediuk, Mugahed Amran, Abdullah Zeyad, Gunasekaran Murali, Nikolai Vatin, Sergey Klyuev, Togay Ozbakkaloglu, Yuriy Vasilev. Use of Recycled Concrete Aggregates in Production of Green Cement-Based Concrete Composites: A Review. Crystals. 2021; 11 (3):232.

Chicago/Turabian Style

Natt Makul; Roman Fediuk; Mugahed Amran; Abdullah Zeyad; Gunasekaran Murali; Nikolai Vatin; Sergey Klyuev; Togay Ozbakkaloglu; Yuriy Vasilev. 2021. "Use of Recycled Concrete Aggregates in Production of Green Cement-Based Concrete Composites: A Review." Crystals 11, no. 3: 232.

Review
Published: 08 February 2021 in Crystals
Reads 0
Downloads 0

In the last few decades, the demand for cement production increased and caused a massive ecological issue by emitting 8% of the global CO2, as the making of 1 ton of ordinary Portland cement (OPC) emits almost a single ton of CO2. Significant air pollution and damage to human health are associated with the construction and cement industries. Consequently, environmentalists and governments have ordered to strongly control emission rates by using other ecofriendly supplemental cementing materials. Rice husk is a cultivated by-product material, obtained from the rice plant in enormous quantities. With no beneficial use, it is an organic waste material that causes dumping issues. Rice husk has a high silica content that makes it appropriate for use in OPC; burning it generates a high pozzolanic reactive rice husk ash (RHA) for renewable cement-based recyclable material. Using cost-effective and commonly obtainable RHA as mineral fillers in concrete brings plentiful advantages to the technical characteristics of concrete and to ensure a clean environment. With RHA, concrete composites that are robust, highly resistant to aggressive environments, sustainable and economically feasible can be produced. However, the production of sustainable and greener concrete composites also has become a key concern in the construction industries internationally. This article reviews the source, clean production, pozzolanic activity and chemical composition of RHA. This literature review also provides critical reviews on the properties, hardening conditions and behaviors of RHA-based concrete composites, in addition to summarizing the research recent findings, to ultimately produce complete insights into the possible applications of RHA as raw building materials for producing greener concrete composites—all towards industrializing ecofriendly buildings.

ACS Style

Mugahed Amran; Roman Fediuk; Gunasekaran Murali; Nikolai Vatin; Maria Karelina; Togay Ozbakkaloglu; R. S. Krishna; Ankit Kumar S.; Shaswat Kumar D.; Jyotirmoy Mishra. Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications. Crystals 2021, 11, 168 .

AMA Style

Mugahed Amran, Roman Fediuk, Gunasekaran Murali, Nikolai Vatin, Maria Karelina, Togay Ozbakkaloglu, R. S. Krishna, Ankit Kumar S., Shaswat Kumar D., Jyotirmoy Mishra. Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications. Crystals. 2021; 11 (2):168.

Chicago/Turabian Style

Mugahed Amran; Roman Fediuk; Gunasekaran Murali; Nikolai Vatin; Maria Karelina; Togay Ozbakkaloglu; R. S. Krishna; Ankit Kumar S.; Shaswat Kumar D.; Jyotirmoy Mishra. 2021. "Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications." Crystals 11, no. 2: 168.

Journal article
Published: 31 January 2021 in Crystals
Reads 0
Downloads 0

This research aimed to study the impact response of topology optimized hammerhead pier beam (HPB) based on the density approach. The HPB is prepared with the concept of preplaced aggregate fibrous concrete (PAFC) comprising two primary approaches; first, the coarse aggregate and fiber are prepacked into the designed formwork. Second, the gaps between the aggregate and fiber are filled with cement grout. In this work, an attempt has been made to study an impact response of HPB made with PAFC. Five HPBs were prepared and strengthened with steel fibers with two different schemes, Firstly, the HPB was reinforced with a full cross-section at 2 and 4% of steel fiber, while another set of beams were only reinforced in the tension zone with the same amount of fibers. The study parameters included compressive strength, impact strength, impact ductility index, number of main and secondary cracks, and failure pattern. It was observed that the PAFC had an increase in compressive strength up to 56.9%, compared with nonfibred concrete. A fully fibered concrete beam with 4% fiber addition was the best at taking impact, and the initial crack and failures were observed at 2725.1 J and 3009.8 J, respectively, compared with non-fibered and tension zone fibered concrete beams. Compressive local damage and transverse flexural cracks were observed, which had caused initial cracks and final failure. The HPB with a full reinforced scheme at 4% dosage exhibited higher impact strength than the normal concrete and beam reinforced only in the tension zone.

ACS Style

Meivazhisalai Parasuraman Salaimanimagudam; Gunasekaran Murali; C. M. Vivek Vardhan; Mugahed Amran; Nikolai Vatin; Roman Fediuk; Yuriy Vasilev. Impact Response of Preplaced Aggregate Fibrous Concrete Hammerhead Pier Beam Designed with Topology Optimization. Crystals 2021, 11, 147 .

AMA Style

Meivazhisalai Parasuraman Salaimanimagudam, Gunasekaran Murali, C. M. Vivek Vardhan, Mugahed Amran, Nikolai Vatin, Roman Fediuk, Yuriy Vasilev. Impact Response of Preplaced Aggregate Fibrous Concrete Hammerhead Pier Beam Designed with Topology Optimization. Crystals. 2021; 11 (2):147.

Chicago/Turabian Style

Meivazhisalai Parasuraman Salaimanimagudam; Gunasekaran Murali; C. M. Vivek Vardhan; Mugahed Amran; Nikolai Vatin; Roman Fediuk; Yuriy Vasilev. 2021. "Impact Response of Preplaced Aggregate Fibrous Concrete Hammerhead Pier Beam Designed with Topology Optimization." Crystals 11, no. 2: 147.

Journal article
Published: 29 January 2021 in Metals
Reads 0
Downloads 0

An experimental investigation is performed on various cold-formed profiled sheets to study the connection behavior of composite deck slab actions using bolted shear connectors. Various profiles like dovetailed (or) re-entrant profiles, rectangular profiles and trapezoidal profiles are used in the present investigation. This experimental investigation deals with the evaluation of various parameters such as the ultimate load carrying capacity versus deflection, load versus slip, ductility ratio, strain energy and modes of failure in composite slab specimens with varying profiles. From the test results the performance of dovetailed profiled composite slabs’ resistance is significantly higher than the other two profiled composite deck slabs.

ACS Style

Siva Avudaiappan; Erick I. Saavedra Flores; Gerardo Araya-Letelier; Walter Jonathan Thomas; Sudharshan N. Raman; Gunasekaran Murali; Mugahed Amran; Maria Karelina; Roman Fediuk; Nikolai Vatin. Experimental Investigation on Composite Deck Slab Made of Cold-Formed Profiled Steel Sheeting. Metals 2021, 11, 229 .

AMA Style

Siva Avudaiappan, Erick I. Saavedra Flores, Gerardo Araya-Letelier, Walter Jonathan Thomas, Sudharshan N. Raman, Gunasekaran Murali, Mugahed Amran, Maria Karelina, Roman Fediuk, Nikolai Vatin. Experimental Investigation on Composite Deck Slab Made of Cold-Formed Profiled Steel Sheeting. Metals. 2021; 11 (2):229.

Chicago/Turabian Style

Siva Avudaiappan; Erick I. Saavedra Flores; Gerardo Araya-Letelier; Walter Jonathan Thomas; Sudharshan N. Raman; Gunasekaran Murali; Mugahed Amran; Maria Karelina; Roman Fediuk; Nikolai Vatin. 2021. "Experimental Investigation on Composite Deck Slab Made of Cold-Formed Profiled Steel Sheeting." Metals 11, no. 2: 229.

Review
Published: 14 January 2021 in Materials
Reads 0
Downloads 0

Concrete is the most common building material; therefore, when designing structures, it is obligatory to consider all structural parameters and design characteristics such as acoustic properties. In particular, this is to ensure comfortable living conditions for people in residential premises, including acoustic comfort. Different types of concrete behave differently as a sound conductor; especially dense mixtures are superior sound reflectors, and light ones are sound absorbers. It is found that the level of sound reflection in modified concrete is highly dependent on the type of aggregates, size and distribution of pores, and changes in concrete mix design constituents. The sound absorption of acoustic insulation concrete (AIC) can be improved by forming open pores in concrete matrices by either using a porous aggregate or foam agent. To this end, this article reviews the noise and sound transmission in buildings, types of acoustic insulating materials, and the AIC properties. This literature study also provides a critical review on the type of concretes, the acoustic insulation of buildings and their components, the assessment of sound insulation of structures, as well as synopsizes the research development trends to generate comprehensive insights into the potential applications of AIC as applicable material to mitigate noise pollution for increase productivity, health, and well-being.

ACS Style

Roman Fediuk; Mugahed Amran; Nikolai Vatin; Yuriy Vasilev; Valery Lesovik; Togay Ozbakkaloglu. Acoustic Properties of Innovative Concretes: A Review. Materials 2021, 14, 398 .

AMA Style

Roman Fediuk, Mugahed Amran, Nikolai Vatin, Yuriy Vasilev, Valery Lesovik, Togay Ozbakkaloglu. Acoustic Properties of Innovative Concretes: A Review. Materials. 2021; 14 (2):398.

Chicago/Turabian Style

Roman Fediuk; Mugahed Amran; Nikolai Vatin; Yuriy Vasilev; Valery Lesovik; Togay Ozbakkaloglu. 2021. "Acoustic Properties of Innovative Concretes: A Review." Materials 14, no. 2: 398.

Journal article
Published: 12 January 2021 in Materials
Reads 0
Downloads 0

This research aims to examine the fracture toughness of hybrid fibrous geopolymer composites under mode II. For this purpose, eight geopolymer mixtures were cast and tested to evaluate the influence of steel and synthetic fiber hybridization on mode II fracture response. The first mixture was plain and was kept as a reference, while steel, polypropylene and glass fibers were used in the rest seven mixtures. The first three of which were mono-reinforced with one of the three fibers, while the rest of the four were hybrids reinforced with combinations of steel and synthetic fibers. The Brazilian center notched disc and the double notched cube test configurations were used to evaluate the mode II fracture toughness of the eight mixtures. The results of the tests showed that steel fibers played the vital role in enhancing the fracture toughness, where the mixtures S1.6 and S1.3G0.3 showed the best performance. The results also showed that increasing the notch depth decreased the fracture toughness with an approximate linear decrement fashion. It was found that the use of double-notched cubes resulted in much higher fracture toughness than the Brazilian notched discs, where the ratio of normalized fracture toughness of the disc specimens to cube specimens was approximately 0.37 to 0.47. This is attributed to the concentration of stresses along one defined path in the disc specimens compared to the multi-path stresses in the cube specimens. In addition, the accompanied tensile stresses in the disc specimens may lead to a mode I fracture before the designed mode II fracture.

ACS Style

Sallal R. Abid; Gunasekaran Murali; Mugahed Amran; Nikolai Vatin; Roman Fediuk; Maria Karelina. Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites. Materials 2021, 14, 349 .

AMA Style

Sallal R. Abid, Gunasekaran Murali, Mugahed Amran, Nikolai Vatin, Roman Fediuk, Maria Karelina. Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites. Materials. 2021; 14 (2):349.

Chicago/Turabian Style

Sallal R. Abid; Gunasekaran Murali; Mugahed Amran; Nikolai Vatin; Roman Fediuk; Maria Karelina. 2021. "Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites." Materials 14, no. 2: 349.

Review
Published: 11 January 2021 in Materials
Reads 0
Downloads 0

The huge demand for concrete is predicted to upsurge due to rapid construction developments. Environmental worries regarding the large amounts of carbon dioxide emanations from cement production have resulted in new ideas to develop supplemental cementing materials, aiming to decrease the cement volume required for making concrete. Palm-oil-fuel-ash (POFA) is an industrial byproduct derived from palm oil waste’s incineration in power plants’ electricity generation. POFA has high pozzolanic characteristics. It is highly reactive and exhibits satisfactory micro-filling ability and unique properties. POFA is commonly used as a partially-alternated binder to Portland cement materials to make POFA-based eco-efficient concrete to build building using a green material. This paper presents a review of the material source, chemical composition, clean production and short-term properties of POFA. A review of related literature provides comprehensive insights into the potential application of POFA-based eco-efficient concrete in the construction industry today.

ACS Style

Mugahed Amran; Gunasekaran Murali; Roman Fediuk; Nikolai Vatin; Yuriy Vasilev; Hakim Abdelgader. Palm Oil Fuel Ash-Based Eco-Efficient Concrete: A Critical Review of the Short-Term Properties. Materials 2021, 14, 332 .

AMA Style

Mugahed Amran, Gunasekaran Murali, Roman Fediuk, Nikolai Vatin, Yuriy Vasilev, Hakim Abdelgader. Palm Oil Fuel Ash-Based Eco-Efficient Concrete: A Critical Review of the Short-Term Properties. Materials. 2021; 14 (2):332.

Chicago/Turabian Style

Mugahed Amran; Gunasekaran Murali; Roman Fediuk; Nikolai Vatin; Yuriy Vasilev; Hakim Abdelgader. 2021. "Palm Oil Fuel Ash-Based Eco-Efficient Concrete: A Critical Review of the Short-Term Properties." Materials 14, no. 2: 332.