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Roman Fediuk
Polytechnic Institute, Far Eastern Federal University, 690922 Vladivostok, Russia

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Journal article
Published: 26 August 2021 in Sustainability
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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
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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
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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.

Review
Published: 28 July 2021 in Polymers
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Geopolymer materials have been gaining ground in the civil construction sector not only for having superior physical properties when compared to conventional cement, but also for being less harmful to the environment, since the synthesis of the geopolymer does not release toxic gases or require high energy costs. On the other hand, geopolymer materials like cementitious matrices have low flexural strength and have fragile breakage. To overcome these deficiencies, the insertion of fibers in geopolymeric matrices has been evaluated as a solution. Although most research on this practice focuses on the use of synthetic fibers, the use of natural fibers has been growing and brings as an advantage the possibility of producing an even more ecological material, satisfying the need to create eco-friendly materials that exists today in society. Thus, this paper aimed to, through the evaluation of research available in the literature, understand the behavior of fibers in geopolymer matrices, identify similarities and differences between the performance of geopolymer composites reinforced with natural and synthetic fibers and, understanding that it is possible, point out ways to optimize the performance of these composites.

ACS Style

Afonso de Azevedo; Ariana Cruz; Markssuel Marvila; Leandro de Oliveira; Sergio Monteiro; Carlos Vieira; Roman Fediuk; Roman Timokhin; Nikolai Vatin; Marina Daironas. Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review. Polymers 2021, 13, 2493 .

AMA Style

Afonso de Azevedo, Ariana Cruz, Markssuel Marvila, Leandro de Oliveira, Sergio Monteiro, Carlos Vieira, Roman Fediuk, Roman Timokhin, Nikolai Vatin, Marina Daironas. Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review. Polymers. 2021; 13 (15):2493.

Chicago/Turabian Style

Afonso de Azevedo; Ariana Cruz; Markssuel Marvila; Leandro de Oliveira; Sergio Monteiro; Carlos Vieira; Roman Fediuk; Roman Timokhin; Nikolai Vatin; Marina Daironas. 2021. "Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review." Polymers 13, no. 15: 2493.

Journal article
Published: 06 July 2021 in Materials Science Forum
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Information on the stress state of protective and decorative coatings during the curing process, in particular on the cohesive state of destruction, is given. The influence of the type of substrate on the change in internal stresses in the coating is considered. It was revealed that the greatest value of shear stresses is observed in coatings on a heavyweight concrete substrate. The subsequent increase in temperature after curing to 50°C leads to an increase in the value of the normal stresses. The probability of cracking of coatings during thermal aging is estimated. It was revealed that during aging there is an exponential decrease in the cohesive strength of coatings and an increase in internal stresses. Aging tends to increase the likelihood of cracking of coatings. The change in stresses in coatings as a result of seasonal fluctuations in air temperature is considered.

ACS Style

Valentina Loganina; Roman Fediuk; Daniil Taranov; Y.H. Mugahed Amran. Estimation of the Probability of Cracking of Facade Coatings. Materials Science Forum 2021, 1037, 675 -683.

AMA Style

Valentina Loganina, Roman Fediuk, Daniil Taranov, Y.H. Mugahed Amran. Estimation of the Probability of Cracking of Facade Coatings. Materials Science Forum. 2021; 1037 ():675-683.

Chicago/Turabian Style

Valentina Loganina; Roman Fediuk; Daniil Taranov; Y.H. Mugahed Amran. 2021. "Estimation of the Probability of Cracking of Facade Coatings." Materials Science Forum 1037, no. : 675-683.

Journal article
Published: 04 July 2021 in Sustainability
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Since December 2019, the COVID-19 epidemic has been spreading all over the world. This epidemic has brought a risk of death in the daily activity (physical and social) participation that influences travellers’ physical, social, and mental health. To analyze the impact of the COVID-19-induced daily activities on health parameters of higher education institutes, 150 students of the Universiti Teknologi PETRONAS, Perak, Malaysia, were surveyed through an online web survey using random sampling techniques. The data were analyzed through RStudio and SPSS using multilevel linear regression analysis and Hierarchical Structural Equation Modeling. The estimated results indicate that restricting individuals from doing out-of-home activities negatively influences physical and social health. A unit increase in the in-home maintenance activities during the COVID-19 pandemic introduced a daily increase of 0.5% in physical health. Moreover, a unit increase in the in-home activities at leisure time represents a 1% positive improvement in social health. Thus, physical activity has proven to be beneficial in improving physical and social health with severe COVID-19. In contrast, the coefficient of determination (R2) for all endogenous variables ranges from 0.148 to 0.227, which is incredibly acceptable in psychological research. For a healthier society with a better quality of life, this study adopted multidisciplinary approaches that are needed to be designed.

ACS Style

Mujahid Ali; Afonso de Azevedo; Markssuel Marvila; Muhammad Khan; Abdul Memon; Faisal Masood; Najib Almahbashi; Muhammad Shad; Mudassir Khan; Roman Fediuk; Roman Timokhin; Aleksey Borovkov; Ihtisham Haq. The Influence of COVID-19-Induced Daily Activities on Health Parameters—A Case Study in Malaysia. Sustainability 2021, 13, 7465 .

AMA Style

Mujahid Ali, Afonso de Azevedo, Markssuel Marvila, Muhammad Khan, Abdul Memon, Faisal Masood, Najib Almahbashi, Muhammad Shad, Mudassir Khan, Roman Fediuk, Roman Timokhin, Aleksey Borovkov, Ihtisham Haq. The Influence of COVID-19-Induced Daily Activities on Health Parameters—A Case Study in Malaysia. Sustainability. 2021; 13 (13):7465.

Chicago/Turabian Style

Mujahid Ali; Afonso de Azevedo; Markssuel Marvila; Muhammad Khan; Abdul Memon; Faisal Masood; Najib Almahbashi; Muhammad Shad; Mudassir Khan; Roman Fediuk; Roman Timokhin; Aleksey Borovkov; Ihtisham Haq. 2021. "The Influence of COVID-19-Induced Daily Activities on Health Parameters—A Case Study in Malaysia." Sustainability 13, no. 13: 7465.

Review
Published: 25 June 2021 in Materials
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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
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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.

Journal article
Published: 03 June 2021 in Buildings
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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
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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.

Review
Published: 04 May 2021 in Journal of Building Engineering
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Marble dust (MD) and granite dust (GD) are generated during the processing (cutting and grinding) of marble and granite, respectively. The dust generated by the mentioned stones is non-biodegradable, which creates various environmental and health hazards. In view of this, incorporation of MD/GD as a replacement for cement to prepare sustainable cementitious composites (such as concrete and mortar) has gained substantial popularity. This article critically discusses the effect of MD/GD on engineering properties of cementitious materials. In addition, to discuss the sustainable development and challenges related to the preparation of MD/GD-modified cementitious materials, 100 researchers worldwide were asked about key sustainability benefits and critical challenges to adding MD/GD in cementitious composites as cement replacement. According to the published literature and responses of researchers, MD/GD are suitable candidates to replace a considerable amount of cement in preparing cementitious composites since they can reduce environmental pollution and costs without causing detrimental effects to engineering properties of prepared cementitious composites. Finally, based on participants’ responses and the published works, a framework for successful development of cementitious materials with MD/GD is presented, which (if applied) can promote commercial use of MD/GD like slag.

ACS Style

Aamar Danish; Mohammad Ali Mosaberpanah; Muhammad Usama Salim; Roman Fediuk; Muhammad Fawad Rashid; Rana Muhammad Waqas. Reusing marble and granite dust as cement replacement in cementitious composites: A review on sustainability benefits and critical challenges. Journal of Building Engineering 2021, 44, 102600 .

AMA Style

Aamar Danish, Mohammad Ali Mosaberpanah, Muhammad Usama Salim, Roman Fediuk, Muhammad Fawad Rashid, Rana Muhammad Waqas. Reusing marble and granite dust as cement replacement in cementitious composites: A review on sustainability benefits and critical challenges. Journal of Building Engineering. 2021; 44 ():102600.

Chicago/Turabian Style

Aamar Danish; Mohammad Ali Mosaberpanah; Muhammad Usama Salim; Roman Fediuk; Muhammad Fawad Rashid; Rana Muhammad Waqas. 2021. "Reusing marble and granite dust as cement replacement in cementitious composites: A review on sustainability benefits and critical challenges." Journal of Building Engineering 44, no. : 102600.

Journal article
Published: 21 April 2021 in Crystals
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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: 16 April 2021 in Fibers
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Reconstruction of buildings and structures is becoming one of the main directions in the field of construction, and the design and production of works during reconstruction are significantly different from the ones of new buildings and structures. After carrying out a number of studies on the inspection of the technical condition of buildings in order to determine the effect of defects on the bearing capacity, the criteria for assessing the state of floor slab structures were identified. Conclusions on the state and further work of elements of reinforced concrete structures are considered. The authors achieve the aim of reinforcing flexural elements of reinforced concrete structures with fiber-reinforced mortar, which is especially important for floor elements with increased operational requirements. A technique for constructing a reinforcement layer using fiber-reinforced mortar from coarse basalt fiber has been developed. The parameters of basalt fiber in the reinforcement layer are substantiated. A method for solving problems of the operation of multilayer coatings under the influence of operational loads is used, in which the model prerequisites for describing the operation of layers are simplified, where the bearing layers are represented by classical Kirchhoff-Love plates. When solving problems, the maximum possible number of design features of flexural members is taken into account, in combination with appropriate experimental studies, the method allows us to consider all the variety of structures for reinforcing coatings and meet the needs of their practical application.

ACS Style

Dmitry Kurlapov; Sergey Klyuev; Yury Biryukov; Nikolai Vatin; Dmitry Biryukov; Roman Fediuk; Yuriy Vasilev. Reinforcement of Flexural Members with Basalt Fiber Mortar. Fibers 2021, 9, 26 .

AMA Style

Dmitry Kurlapov, Sergey Klyuev, Yury Biryukov, Nikolai Vatin, Dmitry Biryukov, Roman Fediuk, Yuriy Vasilev. Reinforcement of Flexural Members with Basalt Fiber Mortar. Fibers. 2021; 9 (4):26.

Chicago/Turabian Style

Dmitry Kurlapov; Sergey Klyuev; Yury Biryukov; Nikolai Vatin; Dmitry Biryukov; Roman Fediuk; Yuriy Vasilev. 2021. "Reinforcement of Flexural Members with Basalt Fiber Mortar." Fibers 9, no. 4: 26.

Journal article
Published: 09 April 2021 in Crystals
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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: 31 March 2021 in Crystals
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It is necessary to solve the ecological problems of regions where there is large-tonnage storage of various finely dispersed materials, including technogenic ones. This article presents the results of an investigation into the possible use of substandard dispersed quartz sands to obtain effective granular aggregates, with the purpose of putting them to use in mortars and concrete. The study used standard and original experimental research methods related to the analysis and preparation of raw materials, technological tests, and the study of the properties of finished composites. Investigations were carried out to obtain composite binders in the component composition of which the use of different ratios of Portland cement and substandard quartz sands prepared in a vortex jet mill was envisaged. It was found that the obtained composite binders had high physical and mechanical characteristics, which was due to the high specific surface area and hydration activity. On the basis of composite binders and finely dispersed quartz sands (fineness from ≤0.16 mm to 1 mm), the granulation of mixtures of 36 types of component compositions was performed. The developed compositions of granular aggregates (GAs) showed the possibility of obtaining them with sufficiently high strength values in cement stone. The studies carried out make it possible to recommend finely dispersed substandard and technogenic materials for the production of GAs, which would ensure the economy of binding materials as well as contribute to the reuse of large-tonnage waste of ferrous and nonferrous metallurgy and the chemical and mining industries.

ACS Style

Valery Lesovik; Liliya Zagorodnyuk; Vladislav Ryzhikh; Ruslan Lesovik; Roman Fediuk; Nikolai Vatin; Maria Karelina. Granular Aggregates Based on Finely Dispersed Substandard Raw Materials. Crystals 2021, 11, 369 .

AMA Style

Valery Lesovik, Liliya Zagorodnyuk, Vladislav Ryzhikh, Ruslan Lesovik, Roman Fediuk, Nikolai Vatin, Maria Karelina. Granular Aggregates Based on Finely Dispersed Substandard Raw Materials. Crystals. 2021; 11 (4):369.

Chicago/Turabian Style

Valery Lesovik; Liliya Zagorodnyuk; Vladislav Ryzhikh; Ruslan Lesovik; Roman Fediuk; Nikolai Vatin; Maria Karelina. 2021. "Granular Aggregates Based on Finely Dispersed Substandard Raw Materials." Crystals 11, no. 4: 369.

Journal article
Published: 29 March 2021 in Nanomaterials
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Compositions and technology for obtaining a photocatalytic composite material (PCM) by deposition of titanium dioxide particles synthesized by the sol–gel method on a silica support of various types (microsilica, gaize and diatomite) have been developed. The properties (chemical and mineral composition, dispersion, specific surface area, porosity, ζ-potential, acid–base properties, and microstructure) of microsilica, gaize and diatomite were studied to assess the effectiveness of using a photocatalytic agent as a carrier. In terms of specific viscosity (ηsp = 45), the concentration of the precursor (tetrabutoxytitanium—TBT) is set at 22 vol. % in a solvent (ethanol), at which it is possible to obtain the maximum amount of dissolved film oligomer without the formation of an aggregate-like precipitate. Modification of the reaction mixture (precursor: ethanol = 1:3) by replacing part of the solvent with a Span-60 surfactant/TBT = 1–1.1 made it possible to obtain polydisperse titanium dioxide particles with peak sizes of 43 nm and 690 nm according to laser granulometry data. Taking into account the interaction of titanium complexes with the surface of a silica support, a phenomenological model of the processes of structure formation of a photocatalytic composite material is proposed. By the value of the decomposition of rhodamine B, the photocatalytic activity of the developed composite materials was determined: PCM based on diatomite—86%; PCM based on microsilica—85%; PCM based on gaize—57%.

ACS Style

Valeria Strokova; Ekaterina Gubareva; Yulia Ogurtsova; Roman Fediuk; Piqi Zhao; Nikolai Vatin; Yuriy Vasilev. Obtaining and Properties of a Photocatalytic Composite Material of the “SiO2–TiO2” System Based on Various Types of Silica Raw Materials. Nanomaterials 2021, 11, 866 .

AMA Style

Valeria Strokova, Ekaterina Gubareva, Yulia Ogurtsova, Roman Fediuk, Piqi Zhao, Nikolai Vatin, Yuriy Vasilev. Obtaining and Properties of a Photocatalytic Composite Material of the “SiO2–TiO2” System Based on Various Types of Silica Raw Materials. Nanomaterials. 2021; 11 (4):866.

Chicago/Turabian Style

Valeria Strokova; Ekaterina Gubareva; Yulia Ogurtsova; Roman Fediuk; Piqi Zhao; Nikolai Vatin; Yuriy Vasilev. 2021. "Obtaining and Properties of a Photocatalytic Composite Material of the “SiO2–TiO2” System Based on Various Types of Silica Raw Materials." Nanomaterials 11, no. 4: 866.

Conference paper
Published: 29 March 2021 in Lecture Notes in Civil Engineering
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Assessment of the quality of building materials is an important step in obtaining commercial products. The information on the assessment of the representativeness of the sample in determining the quality of building materials is provided. In the work, we used a technique for assessing the quality of ceramic bricks in accordance with the Russian standard GOST 530-2012, as well as plaster mixtures in accordance with the Russian standard GOST 33083-2014. The number of samples in the sample was calculated taking into account the risk of the supplier and the consumer. The discrepancy between the number of samples specified in the regulatory documents and the calculated data was revealed. The values of standard confidence probabilities, supplier's and consumer’s risk are revealed. It is proposed to indicate, when determining the sample size in the methods for assessing the quality of building materials, the value of the confidence level, the maximum error, which will make it possible to more objectively judge the entire batch of products.

ACS Style

V. I. Loganina; S. V. Klyuev; R. S. Fediuk; I. A. Aksenov. Methodology for Assessing the Quality of Building Materials. Lecture Notes in Civil Engineering 2021, 167 -173.

AMA Style

V. I. Loganina, S. V. Klyuev, R. S. Fediuk, I. A. Aksenov. Methodology for Assessing the Quality of Building Materials. Lecture Notes in Civil Engineering. 2021; ():167-173.

Chicago/Turabian Style

V. I. Loganina; S. V. Klyuev; R. S. Fediuk; I. A. Aksenov. 2021. "Methodology for Assessing the Quality of Building Materials." Lecture Notes in Civil Engineering , no. : 167-173.

Conference paper
Published: 29 March 2021 in Lecture Notes in Civil Engineering
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The information on the model of changing the properties of coatings, taking into account the hereditary factor, is given. It is shown that the kinetics of changes in coating properties, among other factors, is determined by the prehistory of aging. The application of the aging model, taking into account the hereditary factor in assessing the thermal aging of the coating, humidification of the complex effect of the environment, is considered. The numerical values of the function characterizing the influence of the hereditary factor on the change in the adhesion strength during the cyclic effect of the environment are given. The results of studies and calculations allow us to assume that, depending on the type of aging at its various stages, the rate of change in coating properties is determined by various components: directly the destructive effect of the environment, the prehistory of aging. Knowledge of these factors allows you to more realistically assess the resistance.

ACS Style

V. I. Loganina; S. V. Klyuev; R. S. Fediuk; I. A. Aksenov. Forecasting the Durability of Protective and Decorative Coatings of External Walls of Buildings. Lecture Notes in Civil Engineering 2021, 247 -254.

AMA Style

V. I. Loganina, S. V. Klyuev, R. S. Fediuk, I. A. Aksenov. Forecasting the Durability of Protective and Decorative Coatings of External Walls of Buildings. Lecture Notes in Civil Engineering. 2021; ():247-254.

Chicago/Turabian Style

V. I. Loganina; S. V. Klyuev; R. S. Fediuk; I. A. Aksenov. 2021. "Forecasting the Durability of Protective and Decorative Coatings of External Walls of Buildings." Lecture Notes in Civil Engineering , no. : 247-254.

Journal article
Published: 24 March 2021 in Crystals
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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
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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.