Journal ArticleDOI
Engineering Properties of Alkali-Activated Fly Ash Concrete
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In this article, results from experimental research carried out on certain engineering properties of a new (portland cement-free) concrete made with alkali-activated fly ash are reported.Abstract:
In this paper, results are reported from experimental research carried out on certain engineering properties of a new (portland cement-free) concrete made with alkali-activated fly ash Lab tests were conducted to determine its bending and compression mechanical strength, modulus of elasticity, bond strength, and shrinkage The results show that mortar and concrete made with portland cement-free activated fly ash develop a high mechanical strength in short periods of time, have a moderate modulus of elasticity, bond better to reinforcing steel, and shrink much less than ordinary portland cement concreteread more
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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
New cements for the 21st century: The pursuit of an alternative to Portland cement
TL;DR: Aluminosilicate-based alkaline cements have been classified into five categories as discussed by the authors, and the key advances made in the understanding of synthetic gels are discussed, which ultimately finds hybrid cements to be technologically viable materials for contemporary construction.
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
Effect of GGBFS on setting, workability and early strength properties of fly ash geopolymer concrete cured in ambient condition
Pradip Nath,Prabir Kumar Sarker +1 more
TL;DR: In this paper, a fly ash-based geopolymer concrete for curing in ambient condition can be proportioned for desirable workability, setting time, and compressive strength using ground granulated blast-furnace slag (GGBFS) as a small part of the binder.
Journal ArticleDOI
Fly Ash-Based Geopolymer Concrete
TL;DR: In this article, the fly ash-based geopolymer concrete is described and the material and the mixture proportions, the manufacturing process, and the influence of various parameters on the properties of fresh and hardened concrete.