Journal ArticleDOI
Isothermal reaction kinetics and temperature dependence of alkali activation of slag, fly ash and their blends
TLDR
In this article, isothermal calorimetric studies are carried out on OPC, activated slag and fly ash, and selected fly ash-slag blends at 25°C, 35°C and 40°C to explore their reaction kinetics.About:
This article is published in Construction and Building Materials.The article was published on 2013-08-01. It has received 154 citations till now. The article focuses on the topics: Fly ash.read more
Citations
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Journal ArticleDOI
Reaction kinetics, gel character and strength of ambient temperature cured alkali activated slag–fly ash blends
TL;DR: In this paper, the effects of activator modulus (SiO2/Na2O from 1.0 to 1.8) and slag/fly ash mass ratios (between 90/10 and 50/50) on reaction kinetics, gel characters and compressive strength were investigated.
Journal ArticleDOI
Factors influencing the compressive strength of fly ash based geopolymers
TL;DR: In this article, the reactivity of fly ash (FA) as a precursor for geopolymer concrete has been investigated, including physical and chemical properties of various FA sources, inclusion of ground granulated blast furnace slag (ggbs), chemical activator dosages and curing temperature.
Journal ArticleDOI
Physical–mechanical and microstructural properties of alkali-activated fly ash–blast furnace slag blends
TL;DR: In this paper, the physical and micro-structural properties of alkali-activated binders based on blends of fly ash (FA) and blast furnace slag (BFS) were investigated.
Journal ArticleDOI
Properties of alkali activated slag-fly ash blends with limestone addition
TL;DR: In this paper, the effects of raw materials' composition on fresh behavior, reaction kinetics, mechanical properties and microstructure of alkali activated slag-fly ash-limestone blends are investigated.
Journal ArticleDOI
Isothermal calorimetry and in-situ XRD study of the NaOH activated fly ash, metakaolin and slag.
Zengqing Sun,Anya Vollpracht +1 more
TL;DR: In this article, isothermal calorimeter and in-situ XRD were adopted to study the heat and mineral evolution of NaOH activated fly ash, metakaolin and ground granulated blast furnace slag.
References
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Journal ArticleDOI
Geopolymer technology: the current state of the art
Peter Duxson,Ana Fernández-Jiménez,John L. Provis,Grant C. Lukey,Ángel Palomo,J.S.J. van Deventer +5 more
TL;DR: A brief history and review of geopolymer technology is presented with the aim of introducing the technology and the vast categories of materials that may be synthesized by alkali activation of aluminosilicates as mentioned in this paper.
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.
Book
Alkali-Activated Cements and Concretes
TL;DR: Alkali-Activated Cement and Concrete as discussed by the authors is a type of Cementitious Systems that uses Alkaline Activators to activate slag cements and lime-pozzolan cements.
Journal ArticleDOI
Composition and Microstructure of Alkali Activated Fly Ash Binder: Effect of the Activator
TL;DR: In this paper, the relationship between the mineralogical and microstructural characteristics of activated fly ash mortars and its mechanical properties has been established, and the results of the investigation show that in all cases (whatever the activator used) the main reaction product formed is an alkaline aluminosilicate gel, with low-ordered crystalline structure.