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• W2949677435 abstract "In Algeria, inappropriate soils with high plasticity and low bearing capacity are commonly encountered, it was therefore necessary to improve these soils using mineral additives in order to make them acceptable for construction. However, various forms of deterioration have been observed in construction projects due to the presence of sulphates responsible on the formation of new expansive phrases such as ettringite. For this raison, an experimental investigation was undertaken to study the effect of the presence of calcium sulphate (CaSO 4 .2H 2 O) on the behaviour of the shear strength of two clayey soils stabilized with lime (L), natural pozzolana (NP) and their combination. The mechanical property investigated is the shear strength on samples cured for 7 to 120 days. In addition, X-ray diffraction (XRD) test was conducted in order to investigate the mineralogical changes of both clayey soils. The results show that both clayey soils samples without CaSO 4 .2H 2 O can be successfully stabilized with L or with a combination of lime-natural pozzolana (L-NP) which substantially increases their shear strength and produces high values of shear parameters. However, when combining a fraction of CaSO 4 .2H 2 O to samples containing L alone or a combination of L-NP, a further increase in shear strength values is obtained. In addition, higher shear parameters values are recorded. The increase in strength values is attributed to the formation of ettringite which is observed in XRD diagrams. In general, the chemical stabilization of soils depends on the calcium sulphate content, the additive type and its content, the curing period and the mineralogical composition of soil." @default.
• W2949677435 created "2019-06-27" @default.
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• W2949677435 date "2019-06-02" @default.
• W2949677435 modified "2023-09-23" @default.
• W2949677435 title "Effect of the interaction between calcium sulphate and mineral additives on shear strength parameters of clayey soils" @default.
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