中文摘要：

采用国产聚乙烯醇纤维及天然河砂，设计制备了满足桥面连接板修补应用的高延性水泥基复合材料（HDCC），并对其工作性能、力学性能、弯曲韧性、延性和早期抗裂性能进行了试验研究。结果表明，HDCC拌合物的扩展度为190mm，28d抗折与抗压强度分别为15．5MPa和54．4MPa，弯曲跨中最大挠度10mm，极限延伸率为2．5％，对早龄期抗裂改善率为100％。并将所制备的HDCC应用在某桥面连接板修补工程中．取样测试结果表明，施工现场制备的HDCC满足设计要求，使用效果良好。

英文摘要：

The domestic polyvinyl alcohol fiber and natural river sand were used to prepare high ductility cementitious composite （HDCC） for bridge deck link slab repairing. Workability, mechanical properties, bending toughness, ductility and early age cracking resistance properties of the HDCC were tested. The results show that the slump flow is 190mm. At age of 28 days, flexural strength and compressive strength are 15.5MPa and 54.4MPa, respectively. The maximum bending deflection is 10mm and ultimate elongation is 2.5%. The early age cracking improvement rate is 100%. The application of HDCC in the repair of. one bridge deck link slab was earried out. The test results of in-situ sampling show that the HDCC meets the design requirements and the application effects are satisfied.