黄志斌,王学志,贺晶晶

设计了坍落度为70-90mm的144个水工高延性混凝土立方体试件进行抗压试验，考虑了水胶比和纤维掺量对其抗压强度的影响。记录了在受压过程中，试件的破坏过程与形态，获得了重要的力学性能指标，分析了各因素对其力学性能的影响规律，结果表明：试件的破坏形态表现分为脆性破坏和延性破坏；随着水胶比的减少，水工高延性混凝土立方体抗压强度逐渐增大；当水胶比为0.4时混掺纤维体积掺率为0.3%聚甲醛纤维与0.1%玄武岩纤维的抗压强度最高，而水胶比为0.45时单掺0.6%的聚甲醛纤维的抗压强度取得最大值。经试验发现水胶比为0.4时即可满足28d水工高延性混凝土的设计强度值，0.35水胶比养护28d抗压强度远大于设计强度，故考虑到经济与环保等方面的因素将其舍去。

水工高延性混凝土；水胶比；坍落度；纤维掺量；抗压强度

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