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北京建筑工程研究所最近研制成功并已推广的一种“AN-2”新型混凝土外加剂,能节约百分之十以上的水泥而仍保持混凝土建筑的强度。另外,它可用于低、负温环境的现场施工。粉状的“AN-2”对混凝土有减水
Beijing Institute of Construction recently developed and has promoted a new type of “AN-2” concrete admixture, can save more than ten percent of cement and still maintain the strength of concrete buildings. In addition, it can be used for low and negative temperature on-site construction. Powdered “AN-2” reduces water on concrete