Effect of stabilisation on mechanical properties, moisture buffering and water durability of hypercompacted earth

Bruno, Agostino Walter, Gallipoli, Domenico, Perlot, Céline and Mendes, Joao (2017) Effect of stabilisation on mechanical properties, moisture buffering and water durability of hypercompacted earth. Construction and Building Materials, 149. pp. 733-740. ISSN 0950-0618

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Official URL: https://doi.org/10.1016/j.conbuildmat.2017.05.182

Abstract

This paper investigates the effect of stabilisation by alkaline activation and silicon based admixture on the mechanical properties, moisture buffering capacity and durability of an earthen material for building construction. The stiffness and strength of both unstabilised and stabilised cylindrical samples were measured, under different humidity conditions, by means of unconfined compression tests. The effect of stabilisation on moisture buffering capacity was instead explored by subjecting samples to cyclic variations of relative humidity at constant temperature, according to the experimental procedures prescribed by the norm ISO 24353 [21]. Finally, durability against water erosion was assessed by performing immersion, suction and liquid contact tests on both unstabilised and stabilised samples according to the norm DIN 18945 [16]. Results from this extensive experimental campaign highlighted that the chosen stabilisation methods improved the durability of the material while maintaining a relatively good mechanical performance and a good to excellent moisture buffering capacity.

Item Type: Article
Uncontrolled Keywords: Raw earth; Compacted earth; Stabilisation; Alkaline activation; Silane-siloxane emulsion; Stiffness; Compressive strength; Moisture buffering; Water durability
Subjects: H200 Civil Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 22 Jun 2017 15:15
Last Modified: 02 Jul 2017 00:55
URI: http://nrl.northumbria.ac.uk/id/eprint/31146

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