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 influence of fly ash characteristics and reaction conditions on strength and structure of geopolymers
Violeta Nikolić,Miroslav Komljenović,Zvezdana Baščarević,Nataša Marjanović,Zoran P. Miladinović,Rada Petrović +5 more
TL;DR: In this article, the results of SEM/EDS and NMR analyses revealed that the composition of aluminosilicate gel changed during reaction, i.e. Si/Al atomic ratio decreased with the reaction time.
Book ChapterDOI
The development of alkali-activated mixtures for soil stabilisation
TL;DR: In this paper, the authors present the most up-to-date literature on the development of alkali-activated mixtures as such sustainable alternatives to lime and Portland cement for stabilizing soft soils.
Journal ArticleDOI
Properties of metakaolin geopolymer hardened paste prepared by high-pressure compaction
TL;DR: In this paper, the effects of the combination of the low liquid/solid (l/s) ratio and pressure compaction of the fresh pastes on the properties of the hardened metakaolin geopolymer paste were investigated.
Book ChapterDOI
Assessing the environmental impact of conventional and ‘green’ cement production
TL;DR: In this article, a detailed study of ordinary Portland cement's environmental impacts is followed by an assessment of improvement potentials which can be achieved with the use of supplementary cementitious materials, such as sulfoaluminate or magnesia cements as well as alkali activated binders.
Journal ArticleDOI
Effect of metallic Si addition on polymerization degree of in situ foamed alkali-aluminosilicates
Valentina Medri,Elettra Papa,Jiri Dedecek,Hana Jirglova,Patricia Benito,Angelo Vaccari,Elena Landi +6 more
TL;DR: In this article, the porosity of the resulting foams is determined and related to the process parameters of the contemporary geopolymerization and foaming, including the degree of polymerization degree, the inner volume and the micro-ultra-macro-structure of the foams.
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.