合成纤维增强沿海桥梁混凝土性能研究

Study of Synthetic Fiber to Strengthen Concrete Performance of Coastal Bridge

混凝土中掺加合成纤维能显著提高混凝土的性能,降低混凝土水泥砂浆塑性收缩应力,提高混凝土的抗裂能力,提高抗氯离子渗透能力,提高防冻融能力及抗化学侵蚀能力,从而提高混凝土的耐久性,针对沿海桥梁高性能混凝土开裂原因,提出相应的抗裂措施。

Mixing synthetic fiber into concrete is capable of remarkably increasing the performance of concrete,lowering the plastic shrinkage stress of cement motar of concrete, enhancing the crack - resistance of concrete, the chloride ion＇ s permeability - resistance, the freeze - thaw - resistance, the chemical etching - resistance as well as the druability of concrete. Aiming at reasons for high - performance concrete crack of coastal bridge, the paper presents appropriate measures for crack resistance.