2011 : The effect of water content change and variation suction in behavior swelling of expansive soil

Prof.Ir. Indrasurya Budisatria Mochtar M.Sc,Ph.D.

Abstract

The changing of climate in Indonesia gives fluctuation of water content in its result rain, evaporation and evapo-transpiration. As a result, the water content change, the expansive soil will volume change and suction. The expansive soil will volumetric swelling upon wetting and shrinngking to drying. This behavior can damage on construction structures, particularly, light building and road. The phenomenom is very interesting to be researched, how far the effect of water content change and variation suction toward the behavior volumetric swelling expansive soil. The material expansive soil of selected from Soko Ngawi region East Java Privince. The research of swelling is done using remolded sample under a thin unconfined lateral condition with diameter 6.35 cm and high 1.50 cm, with initial water content 10% and dry density 1.26 g/cm 3 with modification Oedometer tools. The water content change measured with gypsum block and suction with filter paper Whatman No. 42. The results of research indicate, the water change has linear relation wuth swelling deformation, while the suction has contrary to with swelling deformation. Key words~ The expansive of clay, water content change, variation suction, behavior swelling. 1.