找到达到这个强度所需的时间，对于指导混凝土配合比设计和混凝土施工有着重要的意义。
It is very important for concrete designer and for concrete construction to know the time of the concrete grows this critical strength.
施工单位在做塔吊基础的时候，一定要确保地耐力符合设计要求，钢筋混凝土的强度至少达到设计值的80%。
The construction unit when the tower crane foundation, must ensure that the endurance meets the design requirements, the strength of reinforced concrete at least the design value of 80%.
高性能混凝土是在大幅度提高普通强度混凝土性能的基础上以耐久性设计作为主要指针的一种新型高技术混凝土。
High performance concrete (HPC) is new high-tech concrete, which is on the basis of improving of the property and aimed at the durability design.
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