Mohd Khairy Burhanudin, Mohd Haziman Wan Ibrahim, Ramadhansyah Putra Jaya, B. Sri Umniati
The physical and chemical composition of Ground Coal Bottom Ash (GCBA) exposed to varying grinding periods is discussed in this article. CBA was pulverised for 20 hours, 30 hours, and 40 hours in a ball mill machine. Particle Size Analyzer (PSA) and X-ray Fluorescence (XRF) instrument were used to characterise GCBA. According to the results of the tests, GCBA with a grinding duration of 40 hours generates the largest percentage of the finest particle (50-1000 nm) at 4%, the specific surface area is 13528.18 cm2/cm3, and the specific gravity (SG) is 2.54. According to the XRF results, there are no significant variations in the chemical compositions of the CBA with varying grinding periods. At 20, 30, and 40 hours grinding time, the primary oxide element for SiO2 is 51.5%, 53.8%, and 52.3%, while Al2O3 is 14.3%, 15.1%, and 14.6%, and Fe2O3 is 5.08%, 5.27%, and 5.07% respectively. The sum of three primary oxide constituents surpasses the 70% ASTM C618 limit for pozzolanic material Class F fly ash. © Universiti Tun Hussein Onn Malaysia Publisher’s Office.
Advance Concrete Material Focus Group, Faculty of Civil Engineering and Built Environment, University Tun Hussein Onn Malaysia, Batu Pahat, Johor, Parit Raja, 86400, Malaysia; Jamilus Resarch Center(JRC), Faculty of Civil Engineering and Built Environment, University Tun Hussein Onn Malaysia, Batu Pahat, Johor, Parit Raja, 86400, Malaysia; Department of Civil Engineering, College of Engineering, University Malaysia Pahang, Pahang, Kuantan, 26300, Malaysia; Department of Civil Engineering, State University of Malang, Jl. Semarang No.5, Sumbersari, Kec. Lowokwaru, Jawa Timur, Kota Malang, 65145, Indonesia