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水泥是一种人造的颗粒胶合材料。与水混合以后,能起水化作用,并放出一定热量,叫做水化热。同时会起理化反应,由可塑性浆体变成坚硬的石状体,并能将散状材料(如砂、石)胶结成具有一定抗压强度的整体,它是最重要的建筑材料之一。水泥的品种很多,最常用的主要有硅酸盐水泥、普通硅酸盐水泥(也称普通水泥)、矿渣硅酸盐水泥(矿渣水泥)、火山灰质硅酸盐水泥(火山灰水泥)和粉煤灰硅酸盐水泥(粉煤灰水泥)。在一些特殊工程中,还使用矾土水泥、快硬水泥、膨胀水泥等等,不过一般都不常用,就不作介绍了。
Cement is a kind of artificial particle cementing material. When mixed with water, it can act as a hydration and release a certain amount of heat called hydration heat. At the same time, it will initiate a physical and chemical reaction. It will change from a plastisol to a hard stone, and it can bind bulk materials (such as sand and stone) into a whole with certain compressive strength. It is one of the most important building materials. . There are many varieties of cement, the most commonly used are mainly Portland cement, ordinary portland cement (also known as ordinary cement), slag portland cement (slag cement), pozzolanic portland cement (pozzolan cement) and pulverized coal. Portland cement (fly ash cement). In some special projects, bauxite cement, fast-hardening cement, expansive cement, etc. are also used, but they are generally not used and will not be introduced.