Biocementation Method for Soil Improvement

Microbially induced carbonate precipitation (MICP) is a common natural process performed by introducing bacteria into the soil to hydrolysis urea and with the presence of calcium ions to form calcium carbonate. The produced calcium carbonate can form strong connections between soil grains. This study investigated using the MICP process for soil biologging to reduce permeability and increase the shear strength of soil. Biotechnology aims to improve the mechanical properties of soil (e.g. stiffness, strength, permeability) so that the soil can be more suitable for construction and environmental proposes. Biotechnologies are mainly related to the applications of plants or vegetative soil cover for soil erosion control, slope protection, prevention of slope failure, and reduction of water infiltration into slopes. These can be achieved at a low investment and maintenance costs. This research examined different styles of columns and boxes by biocemention method, and found that after the bioclogging training process, the top surface of the sample is very hard, like the surface of rock. The unconfined compressive strengths of the sand treated with calcium-base over 10 treatments formed a relatively strong compressive strength and high calcium ion content