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
TLDR
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.Abstract:
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. The fundamental chemical and structural characteristics of geopolymers derived from metakaolin, fly ash and slag are explored in terms of the effects of raw material selection on the properties of geopolymer composites. It is shown that the raw materials and processing conditions are critical in determining the setting behavior, workability and chemical and physical properties of geopolymeric products. The structural and chemical characteristics that are common to all geopolymeric materials are presented, as well as those that are determined by the specific interactions occurring in different systems, providing the ability for tailored design of geopolymers to specific applications in terms of both technical and commercial requirements.read more
Citations
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The fate of iron in blast furnace slag particles during alkali-activation
TL;DR: In this article, X-ray fluorescence maps show that discrete iron-rich, titanium-rich and manganese/silicon-rich particles are present in blast furnace slag grains, and these particles remain intact when the slag is used as a precursor for alkali-activated slag (AAS) binders.
Journal ArticleDOI
The Early Age Hydration Reactions of a Hybrid Cement Containing a Very High Content of Coal Bottom Ash
TL;DR: In this paper, the authors examined the complex hydration chemistry of a hybrid alkaline cement containing a high content of coal bottom ash (BA) (>70%) and a low content of portland cement clinker in the presence of an alkaline activator.
Journal ArticleDOI
Effect of synthesis parameters on the development of unconfined compressive strength of recycled waste concrete powder-based geopolymers
TL;DR: In this article, the authors investigated the potential of recycled waste concrete powder (RWCP) as well as the effects of synthesis parameters, including the molarity of NaOH solution, the mass ratio of water glass to Naoh solution (WG/NH), and the mass ratios of liquid alkali activator to solid powder (L/S), on the development of unconfined compressive strength of RWCP-based geopolymers.
Journal ArticleDOI
A novel TiO2/Epoxy resin composited geopolymer with great durability in wetting-drying and phosphoric acid solution
Jie Ren,Jie Ren,Jie Ren,Siyao Guo,Siyao Guo,Siyao Guo,Jie Su,Tiejun Zhao,Tiejun Zhao,Ji-Zhou Chen,Ji-Zhou Chen,Zhang Sulei,Zhang Sulei,Zhang Sulei +13 more
TL;DR: In this paper, a hybrid structured TiO2/Epoxy resin has been prepared by a simple in-situ synthetic method, which was used to enhance alkaliactivated slag/fly ash (AASF) geopolymer paste for the first time.
Journal ArticleDOI
Efficiency of Different Superplasticizers and Retarders on Properties of 'One-Part' Fly Ash-Slag Blended Geopolymers with Different Activators.
TL;DR: The results showed that addition of ‘combined’ admixtures significantly increased the workability and setting time, but slightly reduced the compressive strength of the mixture activated by anhydrous sodium metasilicate powder, as compared to the mixture with no admixture.
References
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Journal ArticleDOI
Geopolymers : inorganic polymeric new materials
TL;DR: In the last few years, technological progress has been made in the development of new materials such as "geopolymers" and new techniques, such as ''sol-gel'' as mentioned in this paper, opening up new applications and procedures and transforming ideas that have been taken for granted in inorganic chemistry.
Book
High-resolution solid-state NMR of silicates and zeolites
Günter Engelhardt,Dieter Michel +1 more
TL;DR: High-Resolution NMR of Solids and Adsorbed Molecules as mentioned in this paper is a well-known technique for high-resolution NMR for solids and adsorbed molecules.
Journal ArticleDOI
Industrially interesting approaches to “low-CO2” cements ☆
TL;DR: In this paper, the authors discuss the practicality of replacing portland cements with alternative hydraulic cements that could result in lower total CO 2 emissions per unit volume of concrete of equivalent performance.
Journal ArticleDOI
The geopolymerisation of alumino-silicate minerals
Hua Xu,J.S.J. van Deventer +1 more
TL;DR: In this paper, the effect of mineral properties on the compressive strength of the synthesized geopolymer was investigated, and it was shown that a wide range of natural Al-Si minerals could serve as potential source materials for the synthesis of geopolymers.