Improved Engineering Properties of SWC and OPC-Treated HPC Soil

Abstract

In this research, it was aimed to treat high plasticity clayey (HPC) soil with super white cement (SWC). To determine the effectiveness of SWC in the stabilization of HPC soil, ordinary Portland cement (OPC) was also used in the experimental studies for the purpose of comparison. As the unconfined compressive strength (UCS) values of SWC-treated HPC specimens dried in open air showed an increase of 390%, the UCS values of wet-cured specimens showed a 235% increase. In addition, while the UCS values of OPC-treated HPC specimens dried in open air displayed an increase of 235%, the UCS values of wet-cured specimens displayed a 130% increase. Both stabilizers were also effective in reducing the swelling pressure and the swelling percentage of HPC soil. The swelling pressure and percentage of HPC soil treated with OPC were reduced by 50 and 90% respectively. As the compressibility of HPC soil stabilized with SWC was reduced by 95%, the compressibility of HPC soil stabilized with OPC was reduced by 88%. The UCS, swelling and compressibility tests have shown that New type cement of SWC is a more effective material than OPC in improving the engineering properties of HPC. © The Author(s), under exclusive licence to Shiraz University 2025.