Abstract
Expansive soil is one of the problematic soils that can swell and shrink, causing damage to buildings. Expansive soil needs improvement before being used for buildings. The typical method for expansive soil improvement is mixing soil with additives such as cement, lime, and fly ash. However, mixing additives like cement, lime, and fly ash is not easy to distribute evenly and negatively impacts the environment. Soybean Crude Urease-Calcite Precipitation (SCU-CP) is a soil improvement method currently being developed. SCU-CP is easier to apply in the field and more environmentally friendly than the common method. SCU-CP method was proven to impact sandy soil and peat soil significantly, but SCU-CP’s impact on expansive soil still needs to be discovered. This study aims to know the effects of SCU-CP on soil swelling parameters and determine the optimum reagent concentration for expansive soil improvement using SCU-CP. This study used three reagent concentrations (1.0 mol/L, 1.5 mol/L, and 2.0 mol/L) and one control sample (without SCU-CP). The swell percentage decreased by 2 – 3% after SCU-CP treatment, but adding reagent concentration did not significantly reduce the swell ratio. Swell pressure did not decrease after SCU-CP treatment. Swell pressure was only reduced by 7.92 kPa with 1.0 mol/L reagent of SCU-CP, while the other concentration swell pressure tended to be increased. This study’s optimum reagent concentration for expansive soil improvement is 1.0 mol/L.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: IOP Conference Series: Earth and Environmental Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.