#TITLE_ALTERNATIVE#

• Main Author: Setiawan (NIM 26989012), Dedy
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/7567
• Institution: Institut Teknologi Bandung

ABSTRACT: <br /> <br /> <br /> This thesis decribes a study of the influence of sulphate content on the characteristics of lime-stabilized expansive clay, The samples were taken from the Cepu-Bojonegoro and Ngawi-Caruban highways of East Java. Over the years, the structures built on this material have suffered extensive damage due to volume changes in the foundation associated with change of season. <br /> <br /> <br /> The present study was concerned primarily with a study of the influence of sulphate content on the swelling pressure of lime-stabilized expansive clay in the short-medium term. Previously it has been show that the detrimental consequences of clay-lime-sulphate interaction may become apparent some time after mixing. <br /> <br /> <br /> In this investigation, to investigate the properties of <br /> <br /> <br /> Cepu-Bojonegoro and Ngawi-Caruban clays, because of the similarity of characteristics of both clays, samples were only investigated from the Cepu-Bojonegoro clay (Cepu clay). <br /> <br /> <br /> The results of the investigation indicate that this material possesses very low strength, and has high swelling. Therefore this soil must be stabilized to reduce the degree of expansiveness, but the beneficial effect of lime may not become apparent if sulphate are present in the soil. An increase in sodium sulphate content increases the liquid limit, increases the maximum dry density, decreases the optimum water content, decreases the strength, and increases the swelling characteristics (swelling potential and swelling pressure). In addition, the influence of sodium sulphate content on the lime-stabilized expansive clay may be apparent only after a long time. It was found that the swelling pressures increased after storage for two months compared with storage for only one day.