The cracking causes of cast in place concrete slab was discussed on three aspects: concrete materials, concrete slab construction and design. And some corresponding precautions are suggested.
从混凝土材料本身、施工、设计三个方面分析了混凝土现浇楼盖产生裂缝的原因，并提出了相应的预防控制措施。
This paper deals with materials, design parameters. construction batch strength and design of mix proportion for underwater concrete cast in a major diameter cast in place pile.
论述大直径灌注桩水下浇注混凝土时的材料选择、设计参数选择、施工配制强度及配合比设计。
The structural strength of the cast-in-place and assembly concrete can change with time. There are corresponding requirements for the concrete strength in different construction stages.
现浇或装配式混凝土结构强度随时间而变化，不同施工阶段对混凝土强度都有相应的要求。
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