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在水泥水化过程中,水泥浆(石)的体积要发生缩减。缩减量依从于水化度,水泥石乃至混凝土的强度发展亦依从于水化度。所以,只要能观测这个体积缩减过程,就可以检测和控制混凝土强度的发展过程。现设1 g水泥的化合水量为23%,水泥比容为0.32cm~3/g,水化物比容为1/2.51=0.398cm~3/g(2.51为水化物密度),则1g水泥在水化反应前后的质量及体积的变化将是:
In the process of cement hydration, the volume of grout (stone) should be reduced. The amount of reduction depends on the degree of hydration, and the strength development of cement stone and even concrete also depends on the degree of hydration. Therefore, as long as the volume reduction process can be observed, the development process of the concrete strength can be detected and controlled. Currently, 1 g cement has a compounded water content of 23%, a cement specific volume of 0.32cm~3/g, and a hydrate specific volume of 1/2.51=0.398cm~3/g (2.51 is the hydrate density), then 1g of cement is The changes in mass and volume before and after the hydration reaction will be: