介绍了聚环氧丙烷类高抗收缩剂的收缩机理和制备方法，并且对其进行了抗压强度及抗拉强度的性能测试。
The reaction mechanism, method of synthesis and property testing of polyoxypropylene series compounds as shrinkage reducing agents in cement concrete are introduced in this paper.
本夹具在固定蝶形试样上下两端，使之成垂直状，搭配环压试验机可测试竖压强度。
This grip is working with ring crush tester to test the column compression strength.
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