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 article, the effects of the foaming agents on the hardened product is discussed, as well as the relative merits of different procedures to synthesize the foamed geopolymer.
213 citations
TL;DR: In this article, the effect of varying the geopolymer composition (water content, Si:Al ratio, Na: Al ratio, and Na + or K + cations) on the sensitivity to ambient temperature drying shrinkage is reported.
Abstract: Ambient temperature drying shrinkage in metakaolin-based geopolymer pastes exposed to low relative humidity environments has been investigated. The effect of varying the geopolymer composition (water content, Si:Al ratio, Na:Al ratio, and Na + or K + cations) on the sensitivity to ambient temperature drying shrinkage is reported. The definition of “structural” water as being the minimum water content required that prevents contractions in the gel structure, and thus drying shrinkage from occurring, is introduced. From the results presented, it is clear that the ionic charge density of cations, the total quantity of cations, and the relative quantities and stabilities of cation: AlO4 � pairs in the paste are major factors affecting the sensitivity of pastes to ambient temperature drying shrinkage.
212 citations
TL;DR: In this article, the effect of water absorption on the mechanical and physical properties of CF reinforced geopolymer composites is investigated, and it is shown that the magnitude of maximum water uptake and diffusion coefficient is increased with an increase in fibre content.
212 citations
TL;DR: IR spectra showed that higher alkaline activator dosage enhanced the structural disruption of the original aluminosilicate phases and a higher degree of polymerization of the geopolymer networks, which suggests that the soluble silicon content serves to reduce the amount of geopolymers.
210 citations
TL;DR: In this article, three repair materials were prepared using cement-based, geopolymeric and steel slag binders, and their mechanical performances such as compressive strength, bond strength and abrasion resistance were examined experimentally.
Abstract: Three repair materials were prepared using cement-based, geopolymeric, or geopolymeric containing steel slag binders. Their mechanical performances such as compressive strength, bond strength and abrasion resistance were examined experimentally. The test results showed that the geopolymeric materials had better repair characteristics than cement-based repair materials, and the addition of steel slag could improve significantly the abrasion resistance of geopolymeric repair. By means of scanning electron microscopy (SEM) it can also be concluded that the steel slag was almost fully absorbed to take part in the alkali-activated reaction and be immobilized into the amorphous aluminosilicate geopolymer matrix.
208 citations