Journal ArticleDOI
Preparation and characterisation of fly ash based geopolymer mortars
TLDR
In this paper, the physical and mechanical properties of fly ash-based geopolymer paste with varying levels of sand aggregate were studied. But the results showed that increasing sand content without increasing the amount of alkaline activator resulted in a decreasing level of geopolymisation within the binder system.About:
This article is published in Construction and Building Materials.The article was published on 2010-10-01. It has received 288 citations till now. The article focuses on the topics: Geopolymer & Fly ash.read more
Citations
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Journal ArticleDOI
A comprehensive review on the applications of coal fly ash
TL;DR: In this paper, the authors present a review of coal fly ash at the global level, focusing on its current and potential applications, including use in the soil amelioration, construction industry, ceramic industry, catalysis, depth separation, zeolite synthesis, etc.
Journal ArticleDOI
Geopolymer concrete: A review of some recent developments
TL;DR: An overview of advances in geopolymers formed by the alkaline activation of aluminosilicates is presented along with opportunities for their use in building construction as mentioned in this paper, with respect to fresh and hardened states, interfacial transition zone between aggregate and geopolymer, bond with steel reinforcing bars and resistance to elevated temperature.
Journal ArticleDOI
The influence of the NaOH solution on the properties of the fly ash-based geopolymer mortar cured at different temperatures
Gökhan Görhan,Gökhan Kürklü +1 more
TL;DR: In this paper, the effect of NaOH concentration on the physical properties of the final product was investigated by applying curing on geopolymer mortars in different NaOH concentrations at different temperatures and for different curing times.
Journal ArticleDOI
Efflorescence control in geopolymer binders based on natural pozzolan
TL;DR: In this paper, a pumice-type natural pozzolanic material from Taftan, Iran was used to reduce efflorescence in a geopolymer binder.
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Structure and properties of clay-based geopolymer cements: A review
TL;DR: In this article, the chemistry and structure of geopolymers, reaction mechanism and prime materials involved in geopolymer formation are discussed, and the characterization of geo-mers in terms of microstructural, crystallographic and functional groups is elucidated.
References
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Journal ArticleDOI
Alkali-activated fly ashes: A cement for the future
TL;DR: In this paper, the mechanism of activation of fly ash with highly alkaline solutions is described, and the product of the reaction is an amorphous aluminosilicate gel having a structure similar to that of zeolitic precursors.
Journal ArticleDOI
Understanding the relationship between geopolymer composition, microstructure and mechanical properties
Peter Duxson,John L. Provis,Grant C. Lukey,Seth W. Mallicoat,Waltraud M. Kriven,Jannie S.J. van Deventer +5 more
TL;DR: In this paper, a mechanistic model accounting for reduced structural reorganization and densification in the microstructure of geopolymer gels with high concentrations of soluble silicon in the activating solution has been proposed.
Development and properties of low-calcium fly ash-based geopolymer concrete
Djwantoro Hardjito,B. V. Rangan +1 more
TL;DR: The first part of the work carried out by the geopolymer research group at Curtin University of Technology as discussed by the authors describes the development and properties of heat-cured low-calcium fly ash-based concrete.
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Influence of calcium compounds on the mechanical properties of fly ash geopolymer pastes.
TL;DR: Addition of calcium compounds as a fly ash substitute improved mechanical properties for the ambient temperature cured samples while decreasing Properties for the 70 degrees C cured samples.
Journal ArticleDOI
Durability of alkali-activated fly ash cementitious materials
TL;DR: In this article, the durability of AAFA pastes in aggressive environments was evaluated in a number of aggressive environments (deionized water, seawater, sodium sulphate and acidic solutions) and with respect to alkali-silica reaction-induced expansion.