PERBANDINGAN STABILISASI TANAH LEMPUNG DENGAN MENGGUNAKAN ABU SEKAM PADI DAN ZEOLIT

Clay soil is a kind of soil that has a unique characteristic, it will show plasticity and cohessive when it is mixed with water, and it will be harden itself when it is dry. This result a damage to the construction standing on it. Soil stabilization is a way to repair unstable soil such as clay. There are several ways that can be done to stabilize the soil such as mixing the rice husk ashes and zeolites. Rice husk ash is a material that contains a lot of silica and pozzolanic material because it contains free lime elements which can harden by itself. Zeolite is a soil stabilization material that is very suitable to use to improve unstable soil conditions, because it can increase the quality of minerals and increase the bond between particles in the soil. Therefore zeolite can increase the bearing capacity and compressive strength of the soil. The test results showed that the maximum dry unit weight of the rice husk ash and the zeolite mixture was obtained at a percentage of 15%. The percentage increased in maximum dry unit weight of the zeolite mixture was 18.85% or 0.23 gram/cm3 and 1.64% of the rice husk ash mixture or 0.02 gram/cm3. While the optimum water content decreased by 14.2% in the zeolite mixture and 3.6% in the rice husk ash mixture