Topic
Geopolymer
About: Geopolymer is a research topic. Over the lifetime, 6776 publications have been published within this topic receiving 157991 citations. The topic is also known as: geopolymers.
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TL;DR: In this paper, a test method of the efflorescence degree of fly ash based geopolymer was proposed and applied and the effects of the Si/Al ratio on products, microstructure, pore structures, compressive strength, water loss rate and efforescence of geopolymers were systematically investigated.
133 citations
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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.
133 citations
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TL;DR: In this paper, the authors evaluated the life cycle impacts of a geopolymer produced from a kaolin sludge residue from the Brazilian mining industry and found that the use of RHA-derived sodium silicate may reduce environmental impacts by more than 60%.
133 citations
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TL;DR: In this article, the properties of lightweight geopolymer concrete containing aggregate from recycle lightweight block were studied and the recycle block was crushed and classified as fine, medium and coarse aggregates.
133 citations
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TL;DR: In this paper, the dynamic rheological behavior of geopolymers, inorganic materials synthesized by activation of an aluminosilicate source by an alkaline solution, is described.
Abstract: The dynamic rheological behavior of geopolymers, inorganic materials synthesized by activation of an aluminosilicate source by an alkaline solution, is described The pastes studied were mixtures of an activation solution (alkali + silica) and metakaolin The influence of the activation solution (NaOH vs KOH), the silica (Aerosil vs Tixosil), and the temperature on the evolution of the elastic modulus (G′) and viscous modulus (G″) over time were studied in the linear viscoelastic range The results show that the nature of the silica has little influence on the viscous and elastic moduli when the geopolymer is activated by KOH, and that the setting time is faster with sodium hydroxide and at higher temperatures regardless of the geopolymer In addition, during geopolymerization the stepwise variation of the modulus values indicates that the formation of the 3D network occurs in several steps Moreover, geopolymers activated by potassium hydroxide exhibit slower kinetics but the interactions between constituents are stronger, as the loss tangent (tanδ = G″/G′) is lower Finally, the maximum loss tangent, tanδ, was also used as a criterion to determine the temperature dependence of the geopolymers synthesized This criterion is a precursor of the transition to the glassy state The activation energies could thus be determined for the geopolymers synthesized with potassium hydroxide or sodium hydroxide
133 citations