APPLICATION OF DC RESISTIVITY METHOD FOR MONITORING STABILIZATION OF SANDY SILTY SOIL USING BIOAGENT

• Main Author: Widiastuti, Sany
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/80449
• Institution: Institut Teknologi Bandung

Microbiologically Induced Calcite Precipitation (MICP) is one of the biocementation sciences where soil compaction techniques occur due to the metabolic activities of bacteria as bioagents of soil particle adhesives. The bacteria will act as a catalyst for the formation of calcite precipitation in the soil due to the reaction between urea solution and CaCl2. The treatment included a mixture of urea and CaCl2 solutions with different variations and the application of Urease 1A bacteria to passive silt soil which was observed at certain time intervals. This study shows the changes in soil adhesive strength in the treatment using bioagent based on the results of Unconsolidated Undrained (UU) Triaxial Test and monitoring with DC Resistivity method. The UU Triaxial Test results show that the bioagent treatment has an influence on the adhesive strength of the soil. Based on the value of the inner shear angle of the soil, the results of the 1:1 treatment (the ratio of urea and CaCl2) have a change in the inner shear angle of the soil to approximately 4 degrees. This is also supported by the results of DC Resistivity monitoring laboratory and field tests where there is an increase in resistivity value due to the treatment given to sandy silty soil.