Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Influence of clay minerals and associated minerals in alkali activation of soils
Graphical abstract Display Omitted
Highlights Synthetic soils prepared to compare with natural soils. Type and size of clay mineral influences type and size of products formed. Iron compounds may have a retarding effect on geopolymer formation. Composition trade-off between Na:Al molar ratio and NaOH solution concentration.
Abstract Alkali activation is promising for low environmental impact soil stabilisation. Given soils’ complexity, there is a lack of fundamental understanding of how the different components in soil influence their alkali activation behaviour. A novel method was developed to compare three natural soils with synthetic versions. Precursors and products were characterised by XRD, SEM, TGA and FTIR to explore the soils’ alkali activation phase formation behaviour. It is shown that only the clay minerals will determine phase formation, whereas most associated minerals had negligible influence. The trade-off between Na:Al and NaOH concentration in mix design means lower plasticity soils are more suitable.
Influence of clay minerals and associated minerals in alkali activation of soils
Graphical abstract Display Omitted
Highlights Synthetic soils prepared to compare with natural soils. Type and size of clay mineral influences type and size of products formed. Iron compounds may have a retarding effect on geopolymer formation. Composition trade-off between Na:Al molar ratio and NaOH solution concentration.
Abstract Alkali activation is promising for low environmental impact soil stabilisation. Given soils’ complexity, there is a lack of fundamental understanding of how the different components in soil influence their alkali activation behaviour. A novel method was developed to compare three natural soils with synthetic versions. Precursors and products were characterised by XRD, SEM, TGA and FTIR to explore the soils’ alkali activation phase formation behaviour. It is shown that only the clay minerals will determine phase formation, whereas most associated minerals had negligible influence. The trade-off between Na:Al and NaOH concentration in mix design means lower plasticity soils are more suitable.
Influence of clay minerals and associated minerals in alkali activation of soils
Marsh, A. (Autor:in) / Heath, A. (Autor:in) / Patureau, P. (Autor:in) / Evernden, P. (Autor:in) / Walker, P. (Autor:in)
26.08.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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