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To prevent cracking and peeling reduce waterproof effect. Water pouring 12 to 24 hours , can be carried out maintenance, covering

Time is not less than 14 hours . Initial curing shall Exalted , concrete conservation is extremely important fine stone concrete waterproofing layer to the most

After a process . Early concrete curing bad cause dehydration , not only reduces the strength of concrete , but also due to shrinkage caused

Concrete cracks in the surface of the sand from inside , so impermeability significantly reduced. Second, the main technical points of construction control

( A ) concrete mix control optional low shrinkage cement , with a reasonable level and mix cement strength

The relationship between the intensity level concrete . Selection of well-graded coarse and fine aggregate, coarse aggregate in non-super flakiness stones

Standard, fine aggregate can not use sand , clay content strictly controlled within specifications. Try to use a small shrinkage

Aggregate. Aggregate summer temperature is high, the use of sprinkler and other cooling measures , slowing the hydration reaction speed, reduce