1. Control the quality of concrete raw materials：
The quality of concrete raw materials has a very important influence on the performance of concrete. The performance of raw materials used in the preparation of shrinkage and cracking-resistant concrete must meet the quality requirements of relevant standards. Therefore, high-quality active admixtures can be selected, and fly ash and mineral powder are double-mixed; the quality of aggregate has a great influence on the crack resistance of concrete, and the mud content and mud content should be controlled. Sand and gravel with continuous gradation and small porosity; choose high-performance water reducing agent with high water reducing rate and small shrinkage ratio.
2. Optimizing concrete mix parameters：
The parameters of the concrete mix ratio have a great influence on the crack resistance of the concrete. Therefore, in order to improve the volume stability of the concrete, the mix design rules of the crack-resistant concrete should be followed in the design of the concrete mix ratio: that is, low cement consumption, low water consumption, appropriate Water-cement ratio, maximum aggregate bulk density, and dual blending of active admixtures and superplasticizers, etc. Under the condition of ensuring that the workability required by the design and construction is met, the content of coarse aggregate in the concrete should be increased as much as possible, the sand rate and the content of slurry should be reduced, and the fluidity and uniformity of the concrete should be controlled at the same time.
3. Other measures to optimize concrete crack resistance：
In order to solve the problem of concrete cracking, the anti-cracking performance of concrete can be improved by adding auxiliary anti-cracking materials; surface wet curing can also be carried out for large-area concrete; thermal insulation or cooling measures should be taken for large-volume concrete after formwork removal; on-site construction Avoid carrying out in rainy, snowy and windy weather; for the underground diaphragm wall structure, implement backfilling measures.
