Compression Strength of Soft Clay Stabilization with Rice Husk Ash and Spent Catalyst RCC 15 Sandy D Sagala (1), Syahril S (1,a*), R. Desutama R.B.P (2), Indra Noer Hamdan (3)
(1) Magister of Applied Infrastructure Engineering Study Program, Department of Civil Engineering, Polytechnic of Bandung State, Indonesia
(2) Department of Civil Engineering, Faculty of Engineering, Polytechnic of Bandung State, Indonesia
(3) Department of Civil Engineering, Faculty of Engineering, National Institute of Technology Bandung, Indonesia
Abstract
The purpose of soil stabilization in soft clay chemically is to improve the bearing capacity so it can bear the mass upper structure. This research used additive material Rice Husk Ash (RHA) and spent catalyst RCC 15 (RCC) as a stabilizator. The first step is to take the soft clay soil samples and examine the index properties. The engineering properties test is to get the Unconfined Compression Strength (UCS) value result. The mixture variant percentage used in this research referred to the prior research. For RHA is 6% percentage, and the percentage of RCC 15 is 5%, 7%, 9%, and 11%. In testing the index properties of atterberg limit, the plasticity index (PI) of soft soil, variations of 6% RHA + 5% RCC, 6% RHA + 7% RCC, 6% RHA + 9% RCC, 6% RHA + 11% RCC are 29.45%, 28.22%, 26.44%, 25.68% and 25.55%. It can be posited that an increase in the degree of mixture variation is associated with a reduction in the plasticity index (PI). In Unconfined Compression Strength (UCS) Test, the qu values of soft soil, of 6% RHA + 5% RCC, 6% RHA + 7% RCC, 6% RHA + 9% RCC, 6% RHA + 11% RCC are 0.412 kg/cm2, 0.671 kg/cm2, 0.826 kg/cm2, 1.235 kg/cm2 and 1.425 kg/cm2. The compressive strength value of the soil increases with increasing percentage of spent catalyst rcc 15. The maximum result of Atterberg Limit and Unconfined Compression Strength Test is 6% of RHA and 11% of RCC 15.
