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安徽省建筑科学研究所在两淮煤炭基地建设中,为解决因大型和特大型矿井井筒较深,而对井壁混凝土的强度和抗渗指标要求较高的实际问题,同安徽省煤矿设计院协作,并在省特凿公司的配合下,在淮南西风井的预制钢筋混凝土井壁中,试用掺明矾石膨胀剂配制高强度、高抗渗混凝土获得成功。该文指出,考虑到施工时气温影响,改善混凝土的和易性和抗冻性能,当施工气温在10℃以上时,采用不低于525号的巢湖普通硅酸盐水泥,掺
During the construction of Lianghuai Coal Base in Anhui Province, the Institute of Building Science of Anhui Province, in order to solve the deep well boreholes in large and very large mines, and have high requirements for the strength and impermeability indexes of borehole concrete, the same with the Anhui Coal Mine Design Institute Collaboration, and with the cooperation of the provincial special cutting company, in the prefabricated reinforced concrete wall of Huai’nan Xifeng well, trials of mixed alum vermiculite expansion agent to prepare high-strength, high-impermeability concrete have been successful. The article points out that considering the effect of temperature during construction and improving the workability and frost resistance of concrete, when the construction temperature is above 10°C, Chaohu Ordinary Portland Cement of not less than No. 525 shall be used.