Journal ArticleDOI
Metakaolin and fly ash alkali-activated mortars compared with cementitious mortars at the same strength class
TLDR
Alkali-activated and cementitious mortars were tested and compared in terms of workability, dynamic modulus of elasticity, porosimetry, and water vapor permeability as discussed by the authors.About:
This article is published in Cement and Concrete Research.The article was published on 2016-10-01. It has received 120 citations till now. The article focuses on the topics: Cementitious & Shrinkage.read more
Citations
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Drying shrinkage in alkali-activated binders – A critical review
TL;DR: In this paper, a review of the drying shrinkage behavior of slag, fly ash and metakaolin-based binders with slag precursors is presented, and different solutions to limit the shrinkage are also presented.
Journal ArticleDOI
Durability of alkali-activated materials in aggressive environments: A review on recent studies
TL;DR: In this paper, the authors reviewed factors influencing water absorption and permeability of AAMs, effect of gel composition and exposure environments on carbonation, chloride penetration, and chloride migration test methods, and sulfate resistance in high-calcium and lowcalcium alkali-activated systems.
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Chloride ingress and steel corrosion in geopolymer concrete based on long term tests
TL;DR: In this paper, the authors explored the chloride permeability and initiation of chloride induced corrosion of geopolymer concrete in accelerated chloride environment using longer test period, and showed that the apparent chloride diffusion coefficient of blended fly ash and slag-based concrete is lower than that of OPC concrete.
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Properties and characterization of green one-part geopolymer activated by composite activators
TL;DR: In this article, the Na2CO3 was used to replace a portion of Na2SiO3-anhydrous, and the properties of one-part geopolymer with composite activators were investigated systematically.
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Chemical deformation of metakaolin based geopolymer
TL;DR: In this paper, the chemical deformation of metakaolin-based geopolymer (MKG) was investigated and correlations between the chemical deformations and the reaction processes during geopolymers were found.
References
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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.
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Carbon dioxide equivalent (CO2-e) emissions: A comparison between geopolymer and OPC cement concrete
TL;DR: In this article, the authors present the results of comprehensive carbon footprint estimates for both geopolymer and OPC concrete, including energy expending activities associated with mining and transport of raw materials, manufacturing and concrete construction.
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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.
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Geopolymeric materials prepared using Class F fly ash and elevated temperature curing
TL;DR: In this article, the effect of storing at room temperature before the application of heat on phase composition and phase composition was studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and SEM.