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引言在美国,聚合物与水泥和混凝土的结合使用早在二次世界大战以前就开始了,但我们则是在1948年左右才开始知道这种用途。水泥和混凝土总是分别地提到的,这是因为:今天很少把聚合物加到混凝土中去,特别对于承受静荷载的混凝土是这样。现在仍然只把聚合物加到水泥中。这并不是说把聚合物加到混凝土中不会得到真正的好处,而是事实上在聚合物改良水泥与聚合物改良混凝土之间无直接联系。此外,混疑土外加剂的试验条件也与水泥外加剂的不同。至于将来,既然选用特种聚合物分散体能够获得特种性质,可以说存在着一种向专门用途发展的趋势。
Introduction In the United States, the use of polymers in combination with cement and concrete began well before World War II, but we did not begin to know it until about 1948. Cement and concrete are always mentioned separately because of the fact that polymers are rarely added to concrete today, especially for concrete under static load. The polymer is still only added to the cement. This is not to say that adding polymer to concrete does not give a real benefit, but in fact there is no direct link between polymer-modified cement and polymer-modified concrete. In addition, the suspect soil admixture test conditions are also different with the cement admixture. In the future, since the selection of specialty polymer dispersions gives access to specialty properties, there is a tendency toward a specialized use.