Concrete Knowledge 100 Questions (1)

1. What is commercial concrete?

Answer: According to the requirements of the demander, concrete mix with cement, water, sand, stone, 

admixture and mineral admixture and other components according to a certain proportion, 

after metering and mixing in the mixing station, sold and transported to the demander's place of 

delivery within the specified time by mixing transport truck.

2. What are general supplies?

A: Strength grade is not greater than C60, slump is not greater than 180mm, quite large stone particle size in 20 ~ 40mm, 

no other requirements of commercial concrete.

3. What are the special products?

Answer: Any index beyond the scope of general supplies or have special requirements of commercial concrete. 

Such as fine stone concrete, pile concrete, impervious concrete, antifreeze concrete, etc.

4. What is the place of delivery?

Answer: The concrete transfer site determined by both parties in the contract is the construction site.

5. What is ex-factory inspection?

A: Inspection of the quality of commercial concrete before it leaves the factory. Such as sampling detection slump, 

strength test block, visual slump, workability, etc.

6. What is delivery inspection?

A: Inspection of commercial concrete at the point of delivery by both the supplier and the supplier together with the supervisor. 

Such as detecting slump, making test blocks, visually measuring slump, workability, etc.