随着现代混凝土技术的发展,混凝土组分的多元化已成为一种趋势。除波特兰水泥、粗细集料及水外,现代混凝土还一定包括两种重要的外掺料,即以新型高效减水剂、缓凝剂等为代表的化学外加剂和以矿粉、粉煤灰为代表的矿物掺合料。北京东方建宇混凝土科学技术研究院等单位在充分 With the development of modern concrete technology, the diversification of concrete components has become a trend. In addition to Portland cement, coarse aggregate and water, modern concrete must also include two kinds of important external admixture, that is, a new type of superplasticizer, retarder and other chemical additives represented by slag, pulverized coal Gray as a representative of mineral admixtures. Beijing Dongfang Jian Yu Concrete Science and Technology Research Institute and other units in full