1 水泥混凝土方面 a)球状水泥 它是用特殊破碎机使水泥颗烂呈所规定细度的球体而成。用它配制的混凝土流动性大,抗压强度增长10％～50％,并且耐久性高,超致密性好。 b)MDF 它是由水泥空隙中填入水溶性高分子而得到的一种超高强水泥。据研究者发现,该水泥可用波特兰水泥和聚丙烯酰胺或高铝水泥和聚乙烯醇(部分皂化聚醋酸乙烯)配成,但用后种原料拌制,抗压强度达到30O MPa。它的应用领域很广,不仅用于建筑,还可用于机械等领域。 1 Cement Concrete a) Spherical Cement It is a special crusher to make the cement particles rot to a specified fineness sphere. The concrete prepared with it has a large flowability, a compressive strength increase of 10% to 50%, and high durability and super compactness. b) MDF It is an ultra-high strength cement obtained by filling water-soluble polymers into the voids of cement. According to the researchers, the cement can be blended with Portland cement and polyacrylamide or high-aluminum cement and polyvinyl alcohol (partially saponified polyvinyl acetate), but with the latter materials, the compressive strength reaches 30O MPa. Its application area is very wide, not only for construction, but also for machinery and other fields.