1. Cement is hydraulic because ettringite and calcium silicate gel, the main reaction products of cement hydration, are insoluble in water, while calcium hydroxide is slightly soluble in water, and its strength gradually develops with the hydration reaction. The water in the surrounding environment will not damage the strength development.
2. Hydraulicity of cement means that after cement (Portland cement) is mixed with water, cement reacts with water to set and harden. This coagulation and hardening process can be carried out under water or in a humid environment.
3. Generally, the curing of cement and concrete test blocks is in wet environment or limewater to make them reach the ideal label. It is a powdery inorganic mineral material, which has strong chemical activity with water and forms a whole with certain strength after solidification. Cement reacts with water to set and harden, which can be carried out under water or in wet environment.
Extended data:
Characteristics of cement:
1, rapid setting and hardening, good frost resistance, high early strength and high hydration heat.
2. High early strength, high hydration heat and good frost resistance.
3. Corrosion resistance, good water resistance, good heat resistance, low hydration heat, rapid development of steam curing strength and high later strength. Mass concrete engineering above ground, underground and in water; Steam curing concrete members; Items with anti-corrosion requirements,
Baidu Encyclopedia-Cement Coagulation