Experimental investigation on strength improvement of lateritic Halmahera soil using quicklime stabilization

Abstract

The purpose of this study is to investigate the effects of quicklime on soil strength performance of lateritic Halmahera soil (LHS) on a particular mixture composition. The Lateritic soil consists of three types based on its iron content from three different location in Eastern Halmahera Island. Soil sample labeled according to iron contents, that is LHS-1 for low iron content, LHS-2 for medium iron content, and LHS-3 for high iron content. Soil physical properties were obtained from laboratory test according to ASTM testing standard. The soil sample was mixed with 3, 5, 7, and 10% quicklime addition on maximum dry density (MDD) condition from Proctor standard laboratory test results. The sample were cured for 3, 7, 14, and 28 days before being tested for unconfined compression strength (UCT) test. The results was found that the significant effect of iron content to increase strength. The higher of iron content, then strength increases, it is the novelty of this research and differentiate laterite Halmahera soil with other laterite soil in Indonesia. Therefore, the lateritic Halmahera soil potential to be used as road and construction materials.