Kusuma Wardani, M., P. T. K. Sari, and M. Refionasari. “The Performance of Ca(OH)2 to Reduce the Plasticity Index and Increase the Shear Strength Parameter for Expansive Soil”. Journal of the Civil Engineering Forum, Vol. 8, no. 3, July 2022, pp. 237-44, doi:10.22146/jcef.3455.