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

¹ Faculty of Civil Engineering, Institute of Innovation and Digital Economy, University of Transport Technology, Hanoi, Vietnam
² Research Group of Geotechnical Engineering, Construction Materials, and Sustainability, Hanoi University of Mining and Geology, Hanoi, Vietnam
³ Faculty of Civil Engineering, Hanoi University of Mining and Geology, Hanoi, Vietnam
⁴ Faculty of Basic Sciences, Hanoi University of Mining and Geology, Hanoi, Vietnam
⁵ Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, Viet Nam

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

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.