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, the authors used non-calcined water treatment sludge (WTS) as partial replacement of metakaolin (MK) to produce geopolymer.
92 citations
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TL;DR: In this article, the performance of limestone and oil palm shell (OPS) as the alternative aggregates in fly ash based geopolymer concrete was evaluated based on the fresh and hardened concrete test.
92 citations
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TL;DR: The results showed that hospital waste ash can be utilized as source material for the production of geopolymers and that geopolymerization process is able to reduce the amount of the heavy metals found in the leachate of the hospital Waste ash.
92 citations
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TL;DR: In this paper, compositional, structural and morphological study of geopolymers synthesized from metakaolin and an alkali activator is presented, in addition to thermally treated up to 600 and 900°C.
92 citations
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TL;DR: In this article, the authors investigated the suitability of using an existing stress-strain model originally proposed by Popovics for OPC concrete to predict the load-deflection behavior and strength of geopolymer concrete structural members.
Abstract: Ordinary portland cement (OPC) has been traditionally used as the binding agent in concrete. However, it is also necessary to search for alternative low-emission binding agents for concrete to reduce the environmental impact caused by manufacturing of cement. Geopolymer, also known as inorganic polymer, is one such material that uses by-product material such as fly ash instead of cement. Recent research has shown that fly ash-based geopolymer concrete has suitable properties for its use as a construction material. Since the strength development mechanism of geopolymer is different from that of OPC binder, it is necessary to obtain a suitable constitutive model for geopolymer concrete to predict the load–deflection behaviour and strength of geopolymer concrete structural members. This article has investigated the suitability of using an existing stress–strain model originally proposed by Popovics for OPC concrete. It is found that the equation of Popovics can be used for geopolymer concrete with minor modification to the expression for the curve fitting factor, to better fit with the post-peak parts of the experimental stress–strain curves. The slightly modified set of stress–strain equations was then used in a non-linear analysis for reinforced concrete columns. A good correlation is achieved between the predicted and measured ultimate loads, load–deflection curves and deflected shapes for 12 slender test columns.
91 citations