A Review: The Effect of Grinded Coal Bottom Ash on Concrete Nurul Fasihah Basirun, Mohd Haziman Wan Ibrahim, Norwati Jamaludin and Ramadhansyah Putra Jaya MATEC Web Conf., 103 (2017) 01007 Published online: 05 April 2017 DOI: 10.1051/matecconf/201710301007