Potentially of Soybean as Bio-Catalyst in Calcite Precipitation Methods for Improving the Strength of Sandy Soil

The biocementation-based soil improvement technique that has been recently developed is enzyme-induced calcite precipitation (EICP). Previous studies on the EICP used pure commercial urease enzyme as a reaction catalyst to precipitate from urea and calcium chloride. However, inefficient for application large scale due its high price. Therefore, reported soybean potential alternative enzymes. This study evaluates strength of sandy by treatment using grouting solution with extracts bio-catalyst. in this were obtained filtration centrifugation treatment. Based mass quantification ratio, 20 g/L extract concentration both treatments treating solution. Then, unconfined compressive (UCS) tests conducted evaluate increase soil. maximum UCS value was at 28 days curing time treatments. higher 65.6 kPa than 53.6 kPa. Thus, elucidated great be bio-catalyst method.