“THE INFLUENCE OF RIVER AND VOLCANIC SAND AS COATINGS ON POLYPROPYLENE WASTE COARSE AGGREGATE TOWARDS CONCRETE COMPRESSIVE STRENGTH”. Jurnal Teknologi (Sciences & Engineering) 82, no. 4 (May 22, 2020). Accessed December 19, 2024. https://journals.utm.my/jurnalteknologi/article/view/14124.