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 Role of Inorganic Polymer Technology in the Development of ‘Green Concrete’
TL;DR: In this paper, the potential position of and drivers for inorganic polymers (“geopolymers”) as an element of the push for a sustainable concrete industry are discussed.
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Carbon dioxide equivalent (CO2-e) emissions: A comparison between geopolymer and OPC cement concrete
TL;DR: In this article, the authors present the results of comprehensive carbon footprint estimates for both geopolymer and OPC concrete, including energy expending activities associated with mining and transport of raw materials, manufacturing and concrete construction.
Journal ArticleDOI
Advances in alternative cementitious binders
TL;DR: In this paper, four promising alternative binders available as alternatives to Portland cement are discussed, namely calcium aluminate cement, calcium sulfoaluminate cements, alkali-activated binders, and supersulfated cements.
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New cements for the 21st century: The pursuit of an alternative to Portland cement
TL;DR: Aluminosilicate-based alkaline cements have been classified into five categories as discussed by the authors, and the key advances made in the understanding of synthetic gels are discussed, which ultimately finds hybrid cements to be technologically viable materials for contemporary construction.
Journal ArticleDOI
Geopolymer concrete: A review of some recent developments
TL;DR: An overview of advances in geopolymers formed by the alkaline activation of aluminosilicates is presented along with opportunities for their use in building construction as mentioned in this paper, with respect to fresh and hardened states, interfacial transition zone between aggregate and geopolymer, bond with steel reinforcing bars and resistance to elevated temperature.
References
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Journal ArticleDOI
Preparation and Properties of Hydroceramic Waste Forms Made with Simulated Hanford Low-Activity Waste
TL;DR: In this paper, a simulated Hanford AN-107 LAW was calcined at 375°, 450°, 525°, 600°, and 675°C in the presence of sucrose and metakaolin added as a calcination aid.
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Characteristics of aluminosilicate hydrogels related to commercial “Geopolymers”
TL;DR: In this article, the microstructure properties of aluminosilicate hydrogels were investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD), solid-state magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy and small amplitude oscillatory rheometry.
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Influence of cations on the physicochemical and structural properties of aluminosilicate gel precursors. Part 1. Chemical and thermal properties
TL;DR: In this paper, the influence of the type of alkali cations on the properties of aluminosilicate gels were studied by chemical and thermal analyses of the solid phases precipitated from the batches of the following molar composition: 4.41 Me 2 O:Al 2 O 3 :3 SiO 2 :222.2 H 2 O, where Me + = Na +, Na + + K +, Na+ + Li +, and K +.
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Fixing Arsenic in Alkali‐Activated Cementitious Matrices
TL;DR: In this paper, the influence of Fe and Mn on As leaching rates was assessed and the activated metakaolin matrix is less able to retain As than the activated fly ash matrix.
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"Geopolimeros": una única base química y diferentes microestructuras
TL;DR: In this paper, the effect of certain working variables on the microstructural evolution of oven-dried, alkali-activated fly ash was described and the main reaction product in the activation process was an amorphous aluminosilicate gel with a three-dimensional structure.