The Effect Of Rice Husk Ash And Phosphoric Acid As Soft Soil Stabilizing Agent For Plasticity Index Value Muhammad Raihan Riandi (a*), S Syahril (b)
a) Department of Civil Engineering Master Program, Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Ds. Ciwaruga, Kabupaten Bandung Barat, Jawa Barat 40559, Indonesia
*raihanrnd00[at]yahoo.co.id
b)Department of Civil Engineering, Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Ds. Ciwaruga, Kabupaten Bandung Barat, Jawa Barat 40559, Indonesia
Abstract
Many of infrastructure buildings were damaged because it built on soft soil and need a special treatment to increase the strength and bearing capacity of the soil. Soil stabilization is a method of improving soil characteristics by adding some additional material. The method of soil stabilization is using Rice Husk Ash (RHA) because it has a pozzolanic properties that can absorb the water and decrease the plasticity index value of the soil and also use Phosphoric Acid (PA) because it can react easily with water content of the soil. This research used stabilization method by adding 5 variants of rice husk ash (3%, 6%, 9%, 12%, and 15%) as an independent variable and phosphoric acid percentage is 10% as a dependent variable. The purpose of this research is to determine the effect of Rice Husk Ash and Phosphoric Acid which is stabilized for soft soil using USCS (Unified Soil Classification System) method. Based on testing, obtained maximum value on variant 4 (12% RHA + 10% PA) which is 14,5% from 35% soft soil. From this research it is proofed that rice husk ash and phosphoric acid can decrease the plasticity index value and repair the characteristic of soft soil.
Keywords: Rice Husk Ash- Phosphoric Acid- Soil Stabilization- Plasticity Index
