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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Fresh properties, mechanical strength and microstructure of fly ash geopolymer paste reinforced with sawdust
TL;DR: In this article, the feasibility of utilizing sawdust in geopolymer to make reinforced composites and broaden application of sawdust for the use in the manufacturing process was investigated and the experimental results uncover that sawdust addition influences the workability of geopolymers.
Journal ArticleDOI
Effect of particle size and curing temperature on mechanical and microstructural properties of waste glass-slag-based and waste glass-fly ash-based geopolymers
TL;DR: In this paper, the effects of waste glass particle size and curing temperature on the mechanical properties, microstructure and minerology of waste-glass-slag-based and waste glass-fly ash-based geopolymers were investigated.
Journal ArticleDOI
Geopolymer with Hierarchically Meso-/Macroporous Structures from Reactive Emulsion Templating
TL;DR: In this article, a simple synthetic route to hierarchically porous geopolymers using triglyceride oil for a reactive emulsion template was presented, where highly alkaline geopolymer resin was first mixed with canola oil to form a homogeneous viscous emulsion which was then cured at 60°C to give a hard monolithic material.
Journal ArticleDOI
Comparison of red mud and coal gangue blended geopolymers synthesized through thermal activation and mechanical grinding preactivation
TL;DR: In this paper, two binary geopolymers were prepared from the mixture of low-calcium bayer red mud and kaolinite-based coal gangue, and they were synthesized using two affordable and feasible methods mainly differed in preactivation and curing processes.
Journal ArticleDOI
Effect of temperature and alkaline concentration on metakaolin leaching kinetics
TL;DR: In this paper, the authors studied the effect of alkaline concentration and temperature on metakaolin dissolution and hydrolysis and the characteristics of the reaction products formed, and showed that metakaol dissolution is a three-stage process, with a very short period of rapid incongruent MK dissolution resulting in [Al]>[Si] is followed by a moderate speed and duration in which [Al]-≤[Si], denoting congruent, synchronised dissolution and lastly by a slow, later age process in which, under very vigorous conditions, [Si
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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.
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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.