碳化作用
磨细高炉矿渣
材料科学
硅酸盐水泥
熔渣(焊接)
冶金
抗压强度
耐久性
水泥
氢氧化钙
霜冻(温度)
复合材料
化学工程
工程类
作者
Zhenzhao Ding,Nguyen Xuan Quy,Takumi Noguchi,Jihoon Kim,Yukio Hama
标识
DOI:10.1016/j.conbuildmat.2022.127295
摘要
In this study, the change in frost resistance and pore structure of concrete containing blast furnace slag with various replacement ratio due to carbonation were investigated. As a result, there is a close relationship between the carbonation speed and 28-day compressive strength in blast furnace slag concrete. The frost resistance, carbonation resistance and scaling resistance of blast furnace slag cement concrete decrease as blast furnace slag replacement ratio increases. Furthermore, due to carbonation, the frost durability of ordinary Portland cement concrete and the concrete with a low replacement ratio of blast furnace slag tends to decrease. However, the concrete with a high replacement ratio of blast furnace slag tends to increase. Under the carbonation conditions, the pore volume decreases due to carbonation of calcium hydroxide, and the pore structure will be coarsened due to carbonation of C-S-H. In addition, it is expected that permeability of concrete is raised and scaling is inhibited due to carbonation, and the surface area with a certain thickness in the carbonated concrete will be scaled due to freeze–thaw.
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