"Effect of Lime on Volume Change and Compressibility of Expansive Soils", Adnan A. Basma and E. R. Tuncer, Transportation Research Board, Washington D.C., TRR No. 1295, 1992, pp. 52-61.


Heave and settlement of clayey soils present a difficult problem to civil engineers. Several methods are usually suggested to control this problem. The most favored is the addition of stabilizing agents. One such agent is lime which, in one form or another, has been widely used. This study presents an evaluation of the soil-lime system for two soils, which are typical of the highly expansive soils existing in Irbid city in northern Jordan. The lime was added to the soils in the form of admixture in percentages ranging from 0 to 9% or 12% at 3 percent increment and in some instances at 1.5 percent increments. The soil-lime specimens were cured for 1 hour, 7 days and 28 days after which they were subjected to laboratory tests. The soil-lime properties obtained were the grain size distribution, consistency limits, chemical composition (cat-ions and an-ions), swell potential, swell pressure, compression and rebound indices, rate of swell and consolidation, immediate settlement and primary consolidation in percent of total settlement. Generally, lime was found to be most effective in stabilizing heave and settlement of expansive clays as discussed in this paper.

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