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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Mechanical and micromechanical properties of alkali activated fly-ash cement based on nano-indentation
TL;DR: In this article, the authors present mechanical and micromechanical properties of AAFA based on statistical analysis with nano-indentation test, which shows that the increase in sand has the greatest contribution to increase in density.
Journal ArticleDOI
Geopolymerization of halloysite via alkali-activation: Dependence of microstructures on precalcination
TL;DR: In this article, the authors investigated the effects of precalcination temperatures ranging from 450°C to 1000°C on the microstructures and mechanical properties of halloysite-based geopolymer.
Journal ArticleDOI
Thorough understanding of the kinetics and mechanism of heavy metal adsorption onto a pyrophyllite mine waste based geopolymer
Laxmipriya Panda,Swagat S. Rath,Danda Srinivas Rao,Binod Bihari Nayak,B. Das,Pramila K. Misra +5 more
TL;DR: In this paper, the authors explored the effectiveness of a geopolymer, synthesized from pyrophyllite mine waste, as an adsorbent for heavy metals such as Co, Cd, Ni, and Pb from aqueous solution.
Journal ArticleDOI
Kinetics of fly ash leaching in strongly alkaline solutions
TL;DR: In this paper, a wet chemical method was developed which provides for a detailed characterization of the reactivity of fly ash, and the leaching process could be divided into three stages, i.e., in stage one, reaction progress measured by the relative mass of the fly ash reacted (α) was controlled by the rate of glass network dissolution while very little gel formed (α 0.45).
Journal ArticleDOI
Characteristic study of geopolymer fly ash sand as a replacement to natural river sand
TL;DR: In this paper, the authors compared the properties of fly ash sand and natural river sand in terms of physical, chemical, mechanical and durability properties, and concluded that fly ash has the potential to replace natural sand in construction activities.
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.