搅拌过程和流变性对水泥基材料中纤维分布及力学性能影响

硅酸盐通报 ›› 2017, Vol. 36 ›› Issue (1): 89-96.

搅拌过程和流变性对水泥基材料中纤维分布及力学性能影响

牛恒茂;郭海青;武文红;李文静;李继军

内蒙古建筑职业技术学院建筑工程学院，呼和浩特 010070; 内蒙古工业大学理学院，呼和浩特 010051;内蒙古建筑职业技术学院建筑工程学院,呼和浩特,010070;内蒙古工业大学信息工程学院,呼和浩特,010051;内蒙古工业大学理学院,呼和浩特,010051

出版日期:2017-01-15 发布日期:2021-01-18
基金资助:
国家自然科学基金项目(11562016)%内蒙古自治区高等学校科学研究项目(NJZY330)%内蒙古工业大学科学研究项目(X201423,X201524)

Effect of Mixing Procedures and Rheology on Fiber Distribution and Mechanical Property of Cementitious Composite (ECC)

NIU Heng-mao;GUO Hai-qing;WU Wen-hong;LI Wen-jing;LI Ji-jun

Online:2017-01-15 Published:2021-01-18

摘要/Abstract

摘要： 纤维增强水泥基设计复合材料( ECC)具有高延性特征，而成型过程影响纤维在水泥基体内分布状态，进而影响ECC获得高延性性能的稳定性。本文综述了ECC搅拌过程和拌合状态下的流变性能对纤维分布的影响，重点分析了塑性黏度和屈服应力对纤维分布及力学性能的影响。结果表明：后加纤维的搅拌过程是ECC成型过程中纤维分布的最优方式；良好的塑性黏度是保证纤维均匀分布的关键，屈服应力影响纤维分布及取向分布；综合调整ECC的流变性可以保证纤维均匀分布，使硬化后ECC获得稳定的高延性。

关键词: 水泥基材料;搅拌过程;纤维分布;塑性黏度;屈服应力

Abstract: Engineered cementitious composite ( ECC) is characterized by high ductility. The processing of fresh ECC plays a key role on fiber distribution and then influences robustness of high ductility of hardened ECC. The effects of fresh ECC mixing procedures and rheological property on fiber distribution were summarized, moreover, the effects of plastic viscosity and yield stress of fresh ECC on ECC fiber distribution and mechanical property were significantly studied. The results show that the fresh ECC mixing procedure with adding fibers finally is the optimal way;good plastic viscosity of fresh ECC leads to fiber uniform distribution, and yield stress is related to fiber distribution and fiber orientation distribution;Good fiber distribution is obtained by adjusting the rheological property, which results in acquiring robust high ductility of hardened ECC.

Key words: cementitious composite;mixing procedure;fiber distribution;plastic viscosity;yield stress

中图分类号:

TU528.62

牛恒茂;郭海青;武文红;李文静;李继军. 搅拌过程和流变性对水泥基材料中纤维分布及力学性能影响[J]. 硅酸盐通报, 2017, 36(1): 89-96.

NIU Heng-mao;GUO Hai-qing;WU Wen-hong;LI Wen-jing;LI Ji-jun. Effect of Mixing Procedures and Rheology on Fiber Distribution and Mechanical Property of Cementitious Composite (ECC)[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2017, 36(1): 89-96.