Effects of Ground Coal Bottom Ash (CBA) in Concrete Bricks

ASalmia Beddu, Nurliyana Mohd Kamal, Siti Nabihah Sadon, Adi Tariq Satria, Daud Mohamad, Zarina Itam, Agusril, Nazirul Mubin

The disposal of coal bottom ash from power plants are one of the issue due to the problems associated with the disposal ash pond in terms of cost and environmental impact. More attention become imperative to develop new technologies to utilize these waste. This research was carried out to investigate the effects of concrete bricks with the incorporation of grinded coal bottom ash as cement replacement materials. The experimental procedure was conducted by drying the coal bottom ash in an oven for 24 hours. Dried coal bottom ash was grinded to 75 microns in size. The bricks were then air cured for 24 hours and then immersed it in a water tank for further curing until ready for testing in 3, 7, 14 and 28 days. Testing of workability, UPV and compressive strength test were conducted. From the result obtained, the incorporation of grinded coal bottom ash reduced the workability of the fresh mix. The compressive strength of the bricks improved up to the 30% cement replacement as compared to control mix. UPV value of the tested samples indicate the bricks performed well. It can clearly state that the grinded bottom ash can possibly use as cement replacement materials to improve the properties of bricks.

Volume 11 | Issue 5

Pages: 503-506