Results 181 to 190 of about 33,643 (230)
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Journal of Thermal Analysis, 1991
Spectacular technological progress has been made in the last few years through thedevelopment of new materials such as «geopolymers», and new techniques, such as «sol-gel». New state-of-the-art materials designed with the help of geopolymerization reactions are opening up new applications and procedures and transforming ideas that have been taken for ...
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Spectacular technological progress has been made in the last few years through thedevelopment of new materials such as «geopolymers», and new techniques, such as «sol-gel». New state-of-the-art materials designed with the help of geopolymerization reactions are opening up new applications and procedures and transforming ideas that have been taken for ...
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Strength and Microstructural Analysis of Geopolymer Prepared with Recycled Geopolymer Powder
Journal of Wuhan University of Technology-Mater. Sci. Ed., 2021The strength and microstructural analysis of recycled geopolymer are presented in this paper. Five kinds of geopolymers containing 0%, 20%, 50%, 80% and 100 % of recycled geopolymer powder were prepared using metakaolin as the source material. The alkali activator solution was a mixture of sodium silicate (Na2SiO3) and 12 M sodium hydroxide (NaOH). The
Xinjie Wang +5 more
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Thermal Properties of Geopolymers
2009The thermal properties of metakaolin and fly ash geopolymers with comparisons to ordinary Portland cement (OPC) are reviewed. The role and presence of secondary phases and aggregates are also discussed. The chapter explores the following characteristics of geopolymers upon exposure to high temperature: thermal expansion, weight loss, thermodynamics ...
Van Riessen, Arie +2 more
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2014
Geopolymers, also referred to as Aluminosilicate Inorganic Polymers (AIP) and Alkali Activated Cement (AAC) are based on alkali soluble aluminium and silicon precursors (aluminosilicates). Structural differences and resulting properties of geopolymers can be explained by variation in the source silicon to aluminium amorphous molar ratio, alkali metal ...
Les Vickers +2 more
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Geopolymers, also referred to as Aluminosilicate Inorganic Polymers (AIP) and Alkali Activated Cement (AAC) are based on alkali soluble aluminium and silicon precursors (aluminosilicates). Structural differences and resulting properties of geopolymers can be explained by variation in the source silicon to aluminium amorphous molar ratio, alkali metal ...
Les Vickers +2 more
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Bayer-geopolymers: An exploration of synergy between the alumina and geopolymer industries
Cement and Concrete Composites, 2013Abstract Previously, caustic residues such as red mud and sodium oxalate have been used to provide filler and as a supplementary source of alkali for geopolymers. However, rather than incorporation of dilute alkali residues within geopolymer precursors, a significant counter-intuitive approach is to synthesise geopolymers using Bayer process liquors ...
Van Riessen, Arie +4 more
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Hemp reinforcement in lightweight geopolymers
Journal of Composite Materials, 2017Natural fibres have been widely studied as environment-friendly alternative to synthetic ones in composite manufacturing; they can be considered as reinforcement of geopolymeric foams for use as insulating materials. In this regard, the paper focuses on lightweight geopolymers reinforced with hemp fibre grids. These novel composite materials, produced
Galzerano, B +5 more
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2014
This chapter focuses on how the aluminosilicate sources react with the alkaline activating solutions. The application of model systems based on metakaolin is explored in detail and a simplified geopolymerisation model is shown. The critical influence of water content on the outcome of geopolymerisation is clearly demonstrated.
Les Vickers +2 more
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This chapter focuses on how the aluminosilicate sources react with the alkaline activating solutions. The application of model systems based on metakaolin is explored in detail and a simplified geopolymerisation model is shown. The critical influence of water content on the outcome of geopolymerisation is clearly demonstrated.
Les Vickers +2 more
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2013
The lecture gives a short introduction to the technology of what is commonly called geopolymerisation. This technology,which has been studied on scientific level mainly since the last decade, permits the transformation at low temperature and energy consumption of certain inorganic resources into other materials with useful mechanical and thermal ...
Wastiels, Jan, Rahier, Hubert
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The lecture gives a short introduction to the technology of what is commonly called geopolymerisation. This technology,which has been studied on scientific level mainly since the last decade, permits the transformation at low temperature and energy consumption of certain inorganic resources into other materials with useful mechanical and thermal ...
Wastiels, Jan, Rahier, Hubert
openaire +1 more source