目前,美国、加拿大、法国正致力于研究与大量采用廉价的水泥土以代替混凝土。所谓水泥土,就是自然土、硅酸盐水泥和水三者的混合物,其性能相似于混凝土或天然岩石,但它比混凝土便宜,而又具有足够高的强度、耐久性和抗渗性。水泥土作为铺筑建材很早就广泛地应用于公路、街道、机场等地而工程中;而在动力和 At present, the United States, Canada, and France are devoting themselves to researching and using a large amount of inexpensive cement soil instead of concrete. The so-called cement soil is a mixture of natural soil, Portland cement and water. Its performance is similar to that of concrete or natural rock, but it is cheaper than concrete, and it has sufficiently high strength, durability and impermeability. As a building material, cement and soil have been widely used in roads, streets, airports and other places for a long time;