摘   要：通过纤维增韧水泥基复合材料（ECC）单轴拉伸试验，研究了ECC的拉伸应力-应变关系曲线，分析了砂胶比、纤维类型、粉煤灰及矿渣含量等因素对ECC拉伸应变能力的影响规律。试验结果表明，ECC的拉伸应变能力对于组分及配比较为敏感，增加粉煤灰含量可有效提高ECC的拉伸应变能力；增大砂胶比及矿渣含量可以提高材料初裂强度及极限抗拉强度，但不能提高ECC的拉伸应变能力；钢纤维的掺入对于提高材料的应变硬化能力及实现多裂缝开展能力不利。

Abstract: Uniaxial tensile text has been carried out to study the tensile stress-strain relationship of engineering cementitious composites(ECC), and the influence laws of sand-binder ratio, fiber types, fly ash content and slag content on ECC’s tensile strain ability have been analyzed. Experimental results show that the tensile strain ability is sensitive to the ingredients and mixing proportions. The tensile strain ability would be improved effectively with the fly ash content increasing in general. The increase of sand-binder ratio and slag content is helpful to improve the first-crack strength and ultimate tensile strength of ECC, but it can’t improve the tensile strain ability of ECC. Moreover, adding steel fiber is disadvantageous to improve the strain-hardening ability and the development of multi-fractures of ECC.