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
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Journal ArticleDOI
Geopolymerisation kinetics. 3. Effects of Cs and Sr salts
TL;DR: In this paper, alternating current impedance spectroscopy (ACIS) is used to monitor in situ the kinetics of geopolymer formation by alkali silicate activation of metakaolin at 40°C.
Journal ArticleDOI
Microstructure and self-solidification/stabilization (S/S) of heavy metals of nano-modified CFA–MSWIFA composite geopolymers
TL;DR: In this paper, nano-modified composite geopolymers were successfully prepared from municipal solid waste incineration fly ash (MSWIFA) and class C fly ash, and the results indicate that both nano-SiO 2 and nano-γ-Al 2 O 3 have a good modification effect on geopolymer, of which nano SiO 2 has a better performance than nanoγ O 3.
Journal ArticleDOI
Long-term durability properties of geopolymer concrete: An in-depth review
Mugahed Amran,Amin Al-Fakih,S.H. Chu,Roman Fediuk,Sani Haruna,Afonso Rangel Garcez de Azevedo,Nikolai Vatin +6 more
TL;DR: In this article, a review on the production of supplemental-cementing-materials (SCMs), their economic returns, environmental and durability impacts, the conceptual model for geopolymerization, durability affecting factors, and function and long-term durability properties of geocrete is presented.
Journal ArticleDOI
Role of the morphology and the dehydroxylation of metakaolins on geopolymerization
TL;DR: In this article, two commercial metakaolins were tested during partial geopolymerization with potassium silicate in order to emphasize the different surface reactivities, and both manual and short-term mechanical stirring was used for slurry preparation, while radiation, infrared, and microwave heating were used for curing.
Journal ArticleDOI
Influence of the alkaline solution and temperature on the rheology and reactivity of alkali-activated fly ash pastes
TL;DR: In this paper, the effect of the nature and concentration of the activator and temperature on the rheological behavior of AAFA pastes has been investigated, and it has been shown that the activation energies of fly ash pastes are similar regardless of the concentration and silica modulus of activator.
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.