“Effect of Fly Ash on Geotechnical Properties of Expansive soil”, J. eng. sustain. dev., vol. 16, no. 2, pp. 306–316, Jun. 2012, Accessed: Jul. 22, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1217