Evaluation of additives used in treatment of expansive clays
Abstract
Three additives lime, fly ash and sulfonated oil were used to reduce the swelling of a highly expansive clay (bentonite). This study was performed in order to determine technical advantages of each alternative under same test conditions with respect to limiting the expansive behavior of the clays. Bentonite was mixed using different concentrations in percentage per weight such as 10 to 50%. Physical and mechanical tests were carried out to analyze the behavior of each mixture.It is necessary to use a considerable amount of fly ash to obtain an admissible swelling potential. The use of 10% of lime reduces swelling potential until acceptable values. Sulfonic oil requires environmental conditions to reach its electrochemical effects which have been seen in certain path tests exposed to own site temperature changes and ultraviolet radiation, improving the physical and mechanical properties.Downloads
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Acresquim Ltda, Laboratorios de Ingeniería Civil de la Universidad Militar Nueva GranadaReferences
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