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针对巴东长江大桥桥面铺装层厚80mm的C40防水混凝土的设计要求,进行了微膨胀聚丙烯纤维混凝土的配合比设计、性能试验和桥面铺装施工措施研究。结果显示,采用UEA-I膨胀剂补偿收缩和聚丙烯纤维增强的混凝土具有优良的抗裂、抗渗、耐磨、抗冲击和抗疲劳等性能。选定的微膨胀聚丙烯纤维混凝土配合比在巴东长江大桥桥面铺装层中进行了全面施工应用,效果十分理想。
According to the design requirements of C40 waterproofing concrete with a thickness of 80mm in the pavement of Badong Yangtze River Bridge deck, the mix proportion design, performance test and deck pavement construction measures of the micro-expansive polypropylene fiber concrete are studied. The results show that the concrete with shrinkage compensating and polypropylene fiber reinforced with UEA-I expansive agent has excellent properties such as crack resistance, impermeability, abrasion resistance, impact resistance and fatigue resistance. Selected micro-expansive polypropylene fiber concrete mix in the pavement of the pavement of Badong Yangtze River Bridge for a comprehensive construction application, the effect is very satisfactory.