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Description: Provides a comprehensive comparison between portland cement and lime stabilized clay soils through a series of tests including Atterberg limits, unconfined compressive strength, CBR, permeability, leaching and freeze/thaw. Results indicated cement-stabilized clay soils exhibited superior engineering and durability properties. This report is also found on DVD021.
Stabilization, engineering properties, and durability characteristics of clay soils with moderate to high plasticity clay were investigated in the presence of Type I portland cement and hydrated lime. The objective was to perform a direct comparison on the performances of portland cement and lime. The properties investigated were: plasticity indices, unconfined compressive strength, California bearing ratio, strength after vacuum saturation (to evaluate freeze-thaw performance), mass loss in wet-dry test, and hydraulic conductivity and leaching. In order to make a direct comparison, both cement- and lime-stabilized soils were tested under identical conditions. In general, for the moderate plasticity index (PI) soils, the performance of portland cement-stabilized soils was superior to lime in all the characterizations performed. For the high PI soils, performance of lime was better at lower dosage levels (3%). However, once this threshold was crossed at higher dosages (6 and 9%), cement-stabilized soils exhibited superior engineering and durability properties.
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