In this work, quick hardening and high early strength engineered cementitious composites (ECC) were developed by using calcium sulfoaluminate (CSA) cement as the matrix material. The optimal mix design of CSA-ECC was studied with emphasis on the fluidity and mechanical properties. It was found that CSA cement incorporated with 2% polycarboxylate-based superplasticizer (PSP), 1% ultra-high-molecular weight polyethylene (UHMWPE) fiber, and with cement to sand ratio of 0.5 shows the best performance in terms of fluidity, flexural strength, and compressive strength. The fracture energy, tensile strength, and strain capacity of CSA cement was significantly improved by proper mixing of UHMWPE fiber. After that, the performance of CSA-ECC in rapid repairing of concrete members was characterized. The experimental results suggest that the CSA-ECC has good bonding strength to the concrete matrix. Compared with plain concrete members, both flexural and compressive strength of concrete members were significantly reinforced after 1, 3, and 28 days when CEA-ECC was applied as rapid repairing coating.

在这项工作中，以硫铝酸钙（CSA）水泥为基质材料开发了快速硬化和高早期强度的工程胶结复合材料（ECC）。研究了CSA-ECC的最佳混合设计，重点是流动性和机械性能。发现掺有2％聚羧酸盐基高效减水剂（PSP），1％超高分子量聚乙烯（UHMWPE）纤维和水泥砂比为0.5的CSA水泥在流动性，挠曲性方面表现出最佳性能强度和抗压强度。适当混合UHMWPE纤维可显着改善CSA水泥的断裂能，抗张强度和应变能力。之后，表征了CSA-ECC在混凝土构件快速修复中的性能。实验结果表明，CSA-ECC对混凝土基体具有良好的粘结强度。与普通混凝土构件相比，将CEA-ECC用作快速修补涂料后1、3和28天，混凝土构件的抗弯强度和抗压强度均得到了显着增强。