The Study on Properties of Concrete Mixed with Limestone Powder and Silica Fume that Affect the Compressive Strength of High Performance Concrete. การศึกษาคุณสมบัติของคอนกรีตผสมผงหินปูนและซิลิกาฟูมที่ส่งผลต่อการรับกำลังอัดประลัยของคอนกรีตสมรรถนะสูง

Abstract

This research was an experimental research. The objectives were 1) o study the properties of limestone powder and silica fume by replacing cement with limestone powder and silica fume, and, 2) to find the mixing ratio of limestone powder and silica fume by replacing cement with limestone powder and silica fume. That affects the compressive strength.

The findings were as follows:

1)  The mixing ratio of limestone powder in place of cement was at a compressive strength of 200 ksc. The use of  limestone powder in place of cement was at a ratio of 5 - 20%, reducing cement by 5 -20%. The highest compressive strength value was a compressive strength of 137.61. ksc.

2)  The mixing ratio of silica fume in place of cement was at a compressive strength of 200 ksc. The use of silica fume in place of cement was at a ratio of 5 - 20%, reducing cement by 5 - 20%, maximum strength value Including Formula 3, which had a compressive strength of 109.02 ksc.

3)  The result of the mixing ratio of limestone powder and silica fume in place of cement  was at a compressive strength of 200 ksc. of samples 1-5, using limestone powder and silica fume in place of cement was at a ratio of 5 - 20%, reducing cement 5 - 20% maximum compressive strength Including Formula 3, a compressive strength of 177.55 ksc.

4)  The result of the mixing ratio of limestone powder and silica fume in place of cement  was at a compressive strength of 300 ksc. The use of limestone powder and silica fume in place of cement was at  a ratio of 5 - 20%, reducing cement by 5 - 20%. Strength value Maximum compression Namely, Formula 3 had a compressive strength of 241.57 ksc.