Nghiên cứu ảnh hưởng hàm lượng tro bay đến một số tính chất kỹ thuật của bê tông ứng dụng cho các công trình thủy lợi

Abstract

In the study, using fly ash mineral admixture to replace cement with the rate from 10 to 40% by volume, concrete design grade M30 (MPa). The experimental results show that, when replacing a part of cement with fly ash will increase the workability of the concrete mix, the loss of workability of the concrete mix using fly ash decreases from 63,64 to 81,58% when leaving the concrete mixture after 120 minutes. When replacing up to 20% of cement with fly ash by weight, the compressive strength of concrete decreased slightly and still reached the design mark. However, when using 30÷40% fly ash, the compressive strength of concrete decreased by 24,2% and 43,7% compared to the control mix