According to the testing and studying, ultimate strength, elongation and shrinkage on cross section of two kinds of steel bar were determined.

通过测试研究还得到两种钢筋的极限强度、延伸率和断面收缩率等其他高温力学性能参数。

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Research results show that the relationship between autogenous shrinkage at early ages and ultimate tensile strain can be approximately figured by a quadric equation.

研究结果表明，混凝土早期自收缩大小与相应的极限拉伸应变具有显著的二次曲线关系；

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