The reason:
(1) air diversion superplasticizer dosage is too large, so that the concrete containing gas is too large;
(2) the vibration is not enough after mixing the air-induced water reducing agent;
(3) Water is not reduced or the water-cement ratio is increased.
(4) water reducer quality is not required, such as the content of active ingredients is too low.
The solution:
(1) Use other reinforcement measures or re-pouring;
(2) Strengthen the vibration after pouring;
(3) Take measures for the aforementioned reasons;
(4) To identify this batch of water reducing agent.
