อิทธิพลของฝุ่นหินปูนต่อสมบัติของซีเมนต์เพสต์ชนิดไหลตัวได้ผสมเถ้าแกลบ

Abstract

Abstract

This paper presented the influence of limestone powder on the properties of self-flowable cement paste. Type 1 Portland cement was replaced by rice husk ash (RHA) and/or limestone powder (LS) that having averaged particle sizes (D[4,3]) of 24.32 and 15.63 mm, respectively. The replacement levels of RHA and LS at 0%, 10%, 20% and 40% by weight of powder materials. The water-to-powder materials ratio (w/p) at 0.38 was constantly controlled. The fresh and hardened properties of cement paste were investigated. From the test results, it was found that limestone powder can increase the flowability of cement paste containing RHA.