مقايسه تاثير آهك زنده و شكفته بر ويژگيهاي ژئوتكنيكي خاك اصلاح شده

Comparison of Hydrated and Quick Lime Effects on Geotechnical Properties of Improved Soil

This paper describes the result of a study on the determination of geotechnical properties of improved soil treated by quick lime and hydrated lime. Soil samples are mixed with quick lime and hydrated lime in various portions. The geotechnical properties investigated are compaction characteristics, Atterberg limits, compressive strength and CBR. It is observed that the dry density of soil treated with hydrated lime decreases and the optimum water content increases, while there is no noticeable change in dry density and optimum moisture content of soil treated with quick lime. The plasticity index of admixtures indicates a descending trend; however, it is more pronounced in samples treated by quick lime. Addition of small amount of lime causes significant increase in compressive strength of admixtures and increases with curing time. The effect of the quick lime is more significant than the hydrated lime. CBR tests show a trend similar to that observed for compressive strength tests. The optimum amount of hydrated and quick lime for improvement of the soil is presented.