การใช้ประโยชน์ของเถ้าก้นเตาบดละเอียดในคอนกรีตสมรรถนะสูง

Abstract

Abstract

This research is to study the utilization of ground bottom ash in high performance concrete. Control concrete was designed the compressive strength at 28 days of 700 ksc. Portland cement was replaced by ground bottom ash at the rate of 0, 20, 40 and 60% by weight. The experimental results showed that the increasing of ground bottom ash in high performance concrete had a little effect on the reducing of workability and compressive strength of concrete at early ages. At 20% and 40% of replacement, the ground bottom ash concrete could develop the compressive strength higher than that of the control concrete at the ages of 90 days. The durability of ground bottom ash concrete on chloride and sulfate had tend to increase with the replacement of ground bottom ash up to 40% by weight and reduced as the increase of replacement up to 60% by weight. From the result, it was concluded that ground bottom ash could be used to improve the properties of high performance concrete.