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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.
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 StyleV. 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 StyleV. 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.
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.
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 StyleMugahed 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 StyleMugahed 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.
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.
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 StyleSiva 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 StyleSiva 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.
Seismic hazard assessment of earthquake prone terrain is estimated in numerous ways for civil underground structures such as tunnels which receives little attention on the seismic zones of the country. The resemblance of the past behaviour of earthquake is seen in the present seismotectonic block, and this is considered for this study. With this, the magnitudes of future earthquakes and its effects are predicted with Matlab software. In order to emphasize the need for carrying out a detailed Seismic Hazard analysis in underground openings, a proposed communication (road) tunnel project located in Kashmir Himalayas (GPS coordinates of Latitude 32.20° to 37.20° N, Longitude 72.50° to 80.50° E) one of the highest seismic zones of the Country (zone-V, BIS-2002) was taken up and the results reported in the paper. The paper incidentally has brought to light the need for carrying out such detailed seismic analyses in a routine manner for underground structures to be constructed in the country particularly in higher seismic zones, besides adumbrating structural support measures required for the various ground classes in the proposed road tunnel at Kashmir in response to seismic loading and also recommending retrofitting for other structures already in existence. A spin off the study is expected to be in the area of refining seismic zonation of the country and micro-zonation studies that are slated for the future.
Vanuvamalai Arunachalam; Anna University; Siva Avudaiappan; Nivetha Chandrasekar; Erick I. Saavedra Flores; Universidad De Santiago De Chile; Aarupadai Veedu Institute of Technology. Earthquake hazard estimation for road tunnel in Northwest Himalayas. Revista de la construcción 2020, 19, 134 -145.
AMA StyleVanuvamalai Arunachalam, Anna University, Siva Avudaiappan, Nivetha Chandrasekar, Erick I. Saavedra Flores, Universidad De Santiago De Chile, Aarupadai Veedu Institute of Technology. Earthquake hazard estimation for road tunnel in Northwest Himalayas. Revista de la construcción. 2020; 19 (1):134-145.
Chicago/Turabian StyleVanuvamalai Arunachalam; Anna University; Siva Avudaiappan; Nivetha Chandrasekar; Erick I. Saavedra Flores; Universidad De Santiago De Chile; Aarupadai Veedu Institute of Technology. 2020. "Earthquake hazard estimation for road tunnel in Northwest Himalayas." Revista de la construcción 19, no. 1: 134-145.