How much do you know about building materials

1. Clear and coarse aggregate should be used with clean gravel with reasonable granulation, good granular shape, uniform texture, and small line expansion coefficient. It can also be broken pebbles or pebbles, and sandstone crushing should not be used.

2. Fine ingredients and ingredients should be selected with a clean and solid, low -water absorption rate, and a small gap rate with a uniform texture, a uniform texture, a low water absorption rate, and a small gap rate. Sea sand.

3. Cement cement is a powder -like hard -inorganic gel material. Add water and stir in the air or hardened in water, and firmly tie the sand, stone and other materials together. The concrete made of fragmented stones is not only stronger after hardening, but also can resist the erosion of fresh water or saline.

4. Gyllah ash is the fine ash captured from the flue gas after the coal burning. The powder and coal ash are the main solid waste discharged by the coal -fired power plant. The use of the gel effect of flour ash instead of the use of cement in construction engineering can reduce environmental pollution and waste use.

5. External additives are mainly high -efficiency alkali water, which is used to improve concrete performance.

6. Mine powder is used to make the ore crushed products to improve the performance of concrete.