Các đặc tính kỹ thuật của vữa xây dựng sử dụng xỉ lò cao nghiền mịn thay thế một phần xi măng

Abstract

Cement and steel are the two main consumed materials in the construction industry. However, the production of cement depletes a large amount of natural resources and releases a lot of CO2, causing the greenhouse effect. Meanwhile, the production of steel also releases a number amount of granulated blast furnace slag, which should be recycled to avoid the negative effect on the environment. This study investigated the use of the ground granulated blast furnace slag (GGBFS) in producing high-strength mortar. Test results indicated that the drying shrinkage of mortars was significantly reduced with the use of GGBFS. Using a suitable amount of GGBFS (15% or 30%) can improve the strength as well as resistance to Chloride ion attack. All mortars produced in this study had a compressive strength of higher than 80 MPa and a good resistance to Chloride attack.