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
Enhancing the reactivity of aluminosilicate materials toward geopolymer synthesis
L.N. Tchadjié,Stephen O. Ekolu +1 more
TL;DR: A comprehensive review of the main methods used to alter the reactivity of aluminosilicate materials for geopolymer synthesis is presented in this article, which consists of mechanical, thermal, physical separation and chemical activation, of which mechanical activation is the most commonly employed technique.
Journal ArticleDOI
Alkali-bonded ceramics with hierarchical tailored porosity
Elena Landi,Valentina Medri,Elettra Papa,Elettra Papa,Jiri Dedecek,Petr Klein,Patricia Benito,Angelo Vaccari +7 more
TL;DR: In this paper, the intrinsic nano-micro-porosity of the geopolymer was studied and the in situ foaming was strongly dependent on the water content of the precursors and the subsequent process of water elimination.
Journal ArticleDOI
Synthesis of mesoporous geopolymers containing zeolite phases by a hydrothermal treatment
TL;DR: In this paper, the effects of slag addition and molar ratio of alkaline solution on the microstructure and mechanical strength of mesoporous materials were investigated and evidenced by XRD analysis, compressive strength and nitrogen adsorption tests.
Journal ArticleDOI
Mechanical Properties and Microstructure of Class C Fly Ash-Based Geopolymer Paste and Mortar.
TL;DR: This paper presents workability, compressive strength and microstructure for geopolymer pastes and mortars made of class C fly ash at mass ratios of water-to-fly ash from 0.30 to 0.35.
Journal ArticleDOI
Chemical activation of hybrid binders based on siliceous fly ash and Portland cement
Salaheddine Alahrache,Frank Winnefeld,Jean-Baptiste Champenois,Frank Hesselbarth,Barbara Lothenbach +4 more
TL;DR: In this paper, the effect of different activators (sodium carbonate, potassium sodium silicate, potassium citrate and sodium oxalate) on the setting, the hydration kinetics and the strength development of the fly ash-PC blend has been investigated.
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.