Laboratory Experiments in The Stabilization of Clays With Hydrated Lime

作者：K. E. Clare, A. E. Cruchley · 发表于：Géotechnique · 年份：1957 · DOI：10.1680/geot.1957.7.2.97 · 被引用次数：102 · 研究领域：Soil and Unsaturated Flow、Geotechnical and construction materials studies、Soil Management and Crop Yield

Synopsis A study of the literature shows that hydrated lime has been used with success to stabilise soils in road foundations in certain parts of the world, and an investigation has therefore been initiated to study the effect of adding lime to British soils. As published information suggested that cohesive soils would respond more favourably to lime than would granular soils, the experiments were made with a range of clays. The Paper describes the first stage of the work. Samples of unweathered clay from ten geological formations were mixed with 1, 2, 4, 7, and 10% by weight of hydrated lime, at moisture contents near the liquid and plastic limits. The samples were stored in air-tight containers for periods of 1, 6, and 12 months. These, together with a series of freshly prepared samples of similar compositions, were used for the determination of the liquid and plastic limits of the mixtures and for establishing the suction/ moisture content relationships under wetting conditions. Estimations were also made of the amount of lime taken up by the soil, and of the pH (hydrogenion concentration) of the mixtures in aqueous suspension. The properties of all the clays examined were affected by the addition of the hydrated lime. 1% of lime increased the liquid limit as measured in immediate tests, but greater percentages reduced it. When tested after storage the liquid and plastic limits of the mixtures were found to have increased, for each lime content. Chemical analyses indicated...