Aspects of the deformational behaviour of alkali activated fly ash concrete at elevated temperatures

Aspects of the deformational behaviour of alkali activated fly ash concrete at elevated temperatures. Junaid, M. T., Khennane, A., Kayali, O., Sadaoui, A., Picard, D., & Fafard, M. Cement and Concrete Research, 60:24 - 29, 2014. Alkali activated cements;Alkali-activated concretes;Alkali-activated fly ashes;Construction markets;Elevated temperature;Environmental legislations;Ordinary Portland cement;Transient creeps;

Paper abstract bibtex

As a result of tightening of environmental legislation, there is a renewed interest in the technology of alkali activated concrete also known as geopolymer concrete (GPC). Yet, for GPC to assume its own niche in the construction market, it must display equal or better properties at elevated temperatures than Ordinary Portland Cement (OPC) concrete. Currently there is sufficient evidence that GPC has a better resistance to fire; however not all of its behavioural aspects at high temperatures have been investigated. The aim of this research therefore is to investigate its deformational behaviour, in particular the existence or lack of transient creep, which OPC is known to undergo under first time heating when subject to compressive stresses. It was found that not only GPC undergoes transient creep, but also exhibits both expansive and contractive volume changes during heating. It was also found that GPC maintains its structural integrity at 1000 °C. © 2014 Elsevier Ltd.

@article{20141517552916 ,
language = {English},
copyright = {Compilation and indexing terms, Copyright 2023 Elsevier Inc.},
copyright = {Compendex},
title = {Aspects of the deformational behaviour of alkali activated fly ash concrete at elevated temperatures},
journal = {Cement and Concrete Research},
author = {Junaid, Muhammad Talha and Khennane, Amar and Kayali, Obada and Sadaoui, Arezki and Picard, Donald and Fafard, Mario},
volume = {60},
year = {2014},
pages = {24 - 29},
issn = {00088846},
abstract = {As a result of tightening of environmental legislation, there is a renewed interest in the technology of alkali activated concrete also known as geopolymer concrete (GPC). Yet, for GPC to assume its own niche in the construction market, it must display equal or better properties at elevated temperatures than Ordinary Portland Cement (OPC) concrete. Currently there is sufficient evidence that GPC has a better resistance to fire; however not all of its behavioural aspects at high temperatures have been investigated. The aim of this research therefore is to investigate its deformational behaviour, in particular the existence or lack of transient creep, which OPC is known to undergo under first time heating when subject to compressive stresses. It was found that not only GPC undergoes transient creep, but also exhibits both expansive and contractive volume changes during heating. It was also found that GPC maintains its structural integrity at 1000 &deg;C. &copy; 2014 Elsevier Ltd.<br/>},
key = {Fly ash},
keywords = {Fire resistance;Environmental technology;Creep;Concretes;Portland cement;},
note = {Alkali activated cements;Alkali-activated concretes;Alkali-activated fly ashes;Construction markets;Elevated temperature;Environmental legislations;Ordinary Portland cement;Transient creeps;},
URL = {http://dx.doi.org/10.1016/j.cemconres.2014.01.026},
}

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