一、前言随着社会主义建设的蓬勃发展,铁路基建工程量不断增大,在铁路基建工程中,混凝土工程所占数量很大。毛主席指示我们要“多快好省地建设社会主义”。在铁路混凝土工程中,如何适应混凝土快速施工、提高混凝土质量和节约水泥的要求,是混凝土施工中的一个重要课题。无产阶级文化大革命以来,在混凝土工程中,采用化学附加剂的研究试验工作,取得了很大发展。中国科学院工程力学研究所进行了三 I. Introduction With the vigorous development of socialist construction, the amount of railway infrastructure projects has been on the increase. In terms of railway infrastructure projects, the number of concrete projects accounts for a large amount. Chairman Mao instructed us to “build socialism more efficiently and economically.” In the railway concrete engineering, how to adapt to the rapid construction of concrete to improve the quality of concrete and cement requirements, is an important issue in the construction of concrete. Since the Great Proletarian Cultural Revolution, great progress has been made in the research and experiment of using chemical additives in concrete engineering. Institute of Engineering Mechanics, Chinese Academy of Sciences conducted three