EXPERIMENTAL INVESTIGATION ON THE UNFIRED BUILDING BRICKS PRODUCED FROM BOTTOM ASH AND FLY ASH OF NGHI SON COAL POWER PLANT

Abstract

This paper investigates the properties of the unfired building bricks produced from bottom ash and fly ash from Nghi Son coal power plant. Fly ash was used to replace 0%, 30%, 50%, and 70% cement, while bottom ash was used as fine coarse aggregate. Test results indicate that the compressive strength of these bricks reach garde M10, M7.5 and M5.0 coressponding to fly content of 30%, 50%, and 70%. The ultrasonic pulse velocity, bulk density, and thermal conductivity of the bricks reduces, while water absorption of the bricks increases with increasing fly ash content. However, the quality of these bricks is good with the ultrasonic pulse velocity of above 2200 m/s.