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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Molecular mechanisms responsible for the structural changes occurring during geopolymerization: Multiscale simulation
TL;DR: In this article, density functional theory-based coarse-grained Monte Carlo modeling is used to simulate the aluminosilicate geopolymerization reaction and to determine the molecular mechanisms controlling this process.
Journal ArticleDOI
Micromechanical multiscale model for alkali activation of fly ash and metakaolin
TL;DR: In this paper, the process of alkali activation of fly ash and metakaolin is examined in the view of micromechanics, using a combination of intrinsic elastic properties obtained from nanoindentation, evolving volume fractions and percolation theory.
Journal ArticleDOI
An initial study on alkali activated limestone binders
Dulce Esmeralda Ortega-Zavala,José Luis Santana-Carrillo,Oswaldo Burciaga-Díaz,J. Ivan Escalante-Garcia +3 more
TL;DR: Alkaline cements were studied using limestone as the only precursor activated with solutions of sodium hydroxide and waterglass; the activator was used at concentrations of 7 and 10%Na2O using modules of Ms = 0, 1 and 1.5.
Journal ArticleDOI
Opportunities to improve sustainability of alkali-activated materials: A review of side-stream based activators
Elijah Adesanya,Priyadharshini Perumal,Tero Luukkonen,Juho Yliniemi,Katja Ohenoja,Paivo Kinnunen,Mirja Illikainen +6 more
TL;DR: In this article, the authors comprehensively reviewed the utilization and properties of waste-based activators in AAMs and showed the formation of alkali silicates from amorphous silica residues, alkali hydroxides, carbonates and aluminates sourced from biomass and industrial residues.
Journal ArticleDOI
Machine learning to predict properties of fresh and hardened alkali-activated concrete
TL;DR: In this paper, a random forest model was used to predict slump flow and compressive strength of fly ash-activated concrete (AAC) concretes, in relation to physiochemical attributes, curing conditions, and mixing procedures.
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.