纤维增韧水泥基复合材料拉伸性能影响因素研究  

Influence Factors Research on Tensile Property for Engineering Cementitious Composites(ECC)

作　　者：张倩茜[1] 袁广林[1] 张径伟[2] 田露丹[1] 

机构地区：[1]中国矿业大学力学与建筑工程学院,徐州221008 [2]中元国际工程设计研究院上海分院,200127

出　　处：《混凝土与水泥制品》2011年第11期35-38,共4页China Concrete and Cement Products

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。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 muhi-fractures of ECC.

关 键 词：ECC 拉伸性能 砂胶比 粉煤灰 纤维类型 

分 类 号：TU528.572[建筑科学—建筑技术科学]