Laboratory Assessment of Cement-Stabilized Coal Mine Waste Rock as Pavement Foundation Materials

Coal Mine Waste Rock (CWR) has adverse impacts on the environment, including landslides caused by changes in the topography, hydrological systems, and air pollution from hazardous dust. Thus, it is crucial to conduct study on reusing the CWR as construction material. This study presents a laboratory analysis of the primary mechanical properties of CWR treated with cement incorporating coal ash of thermal power plant for use in mine haul road pavement structures. At 2% intervals, the cement content of, and the coal ash content of the mixtures, were varied from 6 to 8%, and 7 to 11%, respectively. According to laboratory test results, cement-stabilized CWR shows the potential to be utilized as substitute materials for pavement foundations due to their strength characteristics met all basic requirements.