Application of Moderate-heat Portland Cement with Rich MgO & C_4AF in Dam Concrete of Goupitai Hydropower Station

The article had researched influencing on mechanics behavior,drying shrinkage,volume deformation of the dam concrete by moderate-heat Portland cement with rich MgO and C_4AF,as well as through analyzing data observed and measured in site verified that micro-expansion that the cement engendered in hydraulic large-volume concrete could compensate the shrinkage of concrete,and that the addition of C_4AF composition could improve the maximum tensile ability of concrete,as a result the breaking resistance of hydraulic large-volume concrete was strengthened.