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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Journal ArticleDOI
The effect of activator concentration on the residual strength of alkali-activated fly ash pastes subjected to thermal load
Alaa M. Rashad,Sayieda R. Zeedan +1 more
TL;DR: In this paper, a comparative study of the residual compressive strength at different temperatures of AAFA pastes chemically activated using sodium silicate with three different concentrations named 20, 30 and 40 (wt%).
Journal ArticleDOI
The effects of alkaline dosage and Si/Al ratio on the immobilization of heavy metals in municipal solid waste incineration fly ash-based geopolymer
Lei Zheng,Wei Wang,Yunchun Shi +2 more
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.
Journal ArticleDOI
Bond strength between blended slag and Class F fly ash geopolymer concrete with steel reinforcement
Arnaud Castel,Stephen J. Foster +1 more
TL;DR: In this paper, the authors used the standard RILEM pull-out test to assess the development of the bond strength from 24h to 28 days after casting, with different heat curing conditions.
Journal ArticleDOI
Effects of Si/Al ratio on the structure and properties of metakaolin based geopolymer
Peigang He,Meirong Wang,Shuai Fu,Dechang Jia,Shu Yan,Jingkun Yuan,Jiahuan Xu,Pengfei Wang,Yu Zhou +8 more
TL;DR: In this paper, the effects of Si/Al ratios on the structure, mechanical properties and chemical stability in air of the obtained geopolymer were systematically investigated, and the results showed that all the samples were XRD amorphous.
Journal ArticleDOI
A critical review of geopolymer properties for structural fire-resistance applications
TL;DR: In this article, the potential of geopolymers towards enhancing the structural fire resistance by critically reviewing its properties subjected to elevated temperature exposure is discussed, and the influence of these factors is discussed at length in this article.
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.