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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SiC fiber reinforced geopolymer composites, part 2: Continuous SiC fiber
Peigang He,Dechang Jia,Binyi Zheng,Shu Yan,Jingkun Yuan,Zhihua Yang,Xiaoming Duan,Jiahuan Xu,Pengfei Wang,Yu Zhou +9 more
TL;DR: In this article, unidirectional SiC fiber reinforced geopolymer composites (SiC f /geopolymer) were prepared and effects of fiber contents on the microstructure and mechanical properties of the composites in different directions were investigated.
Journal ArticleDOI
Production of Geopolymeric Mortars Containing Forest Biomass Ash as Partial Replacement of Metakaolin
TL;DR: In this paper, the use of forest biomass ash (FBA), as partial replacement material in the production of metakaolin (MK) based geopolymeric mortar, and its properties were investigated.
Journal ArticleDOI
Preparation and characterization of active Ni-supported catalyst for syngas production
Sebastiano Candamano,Patrizia Frontera,Anastasia Macario,Fortunato Crea,Janos B. Nagy,Pier Luigi Antonucci +5 more
TL;DR: In this paper, a new Ni-based catalyst, using geopolymer as support was prepared and characterized using scanning electron microscopy (SEM), temperature programmed reduction (TPR), N2 adsorption-desorption, nuclear magnetic resonance (NMR) and transmission electron microscope (TEM).
Journal ArticleDOI
The effect of sodium silicate and sodium hydroxide on the strength of aggregates made from coal fly ash using the geopolymerisation method
TL;DR: In this paper, the physicochemical properties of coal fly ash, the availability of soluble silicates and aluminates, and the concentration of added sodium hydroxide have been investigated, and it has been revealed that the geopolymerisation strongly depends on the physicodynamic properties of fly ash.
Journal ArticleDOI
Direct piezoelectric effect in geopolymeric mortars
TL;DR: In this paper, the occurrence of a direct piezoelectric effect has been discovered for the first time in a metakaolin based geopolymeric mortar, which is due to a complex interplay that involves not-framework cations, framework and water contained in the material pores.
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.