The following statement is true?
A: Pouring concrete can have help surface
B: Miring concrete should be used in 40 minutes
C: Each payment before concrete pouring needs to be signed by the engineer
D: The concrete must be used is minutes after unloading
A: Pouring concrete can have help surface
B: Miring concrete should be used in 40 minutes
C: Each payment before concrete pouring needs to be signed by the engineer
D: The concrete must be used is minutes after unloading
举一反三
- Which of the following is the mostly used type of concrete pavement? A: Jointed plain concrete pavement (JPCP) B: Jointed reinforced concrete pavement (JRCP) C: Continuously reinforced concrete pavement (CRCP) D: Prestressed Concrete Pavements (PCP)
- Which statement is NOT correct about concrete words?? Concrete words are words that you can see, feel, hear, smell, touch and taste.|none of the above|“Honesty,” “pride,” and “patriotism” are concrete words.|Concrete words refer to tangible objects—people, places, and things.
- Reinforced concrete structure is the most used structure in buildings.广泛的
- Comparing with normal concrete, lightweight concretes cannot be used for their thermal insulation.
- Concrete is a polluting material, so all green building materials can be used to replace it. A: 正确 B: 错误