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Journal Articles Construction and Building Materials Year : 2023

Strengthening mechanisms of clay building materials by starch

Abstract

Earth has a renewed interest in eco-friendly building materials. Starch is a promising additive, but its strengthening origin needs understanding to promote better solutions according to soil variability. This multiscale study examined natural clays and starches interactions. Clays and starches were evaluated based on mechanical and rheological properties. Kaolinite was found to be better reinforced by starches. At microscopic scale, starches modified the arrangement of grains and clays, but the role of botanical origin is unclear. At molecular scale, the ratio between amylose and amylopectin led the interactions with kaolinite. These results help to understand how bio-additives affect earth-based building materials.
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Dates and versions

hal-04211006 , version 1 (19-09-2023)

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Julia Tourtelot, Jean-Baptiste d'Espinose de Lacaillerie, Myriam Duc, Jean-Didier Mertz, Ann Bourgès, et al.. Strengthening mechanisms of clay building materials by starch. Construction and Building Materials, 2023, 405, pp.133215. ⟨10.1016/j.conbuildmat.2023.133215⟩. ⟨hal-04211006⟩
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