[1]张秀芝,孙伟,张倩倩,等.混杂钢纤维增强超高性能水泥基材料力学性能分析[J].东南大学学报(自然科学版),2008,38(1):156-161.[doi:10.3969/j.issn.1001-0505.2008.01.030]
　Zhang Xiuzhi,Sun Wei,Zhang Qianqian,et al.Mechanical behaviors of hybrid steel fiber reinforced ultra-high performance cementitious composites[J].Journal of Southeast University (Natural Science Edition),2008,38(1):156-161.[doi:10.3969/j.issn.1001-0505.2008.01.030]
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混杂钢纤维增强超高性能水泥基材料力学性能分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第1期
页码:
156-161
栏目:
材料科学与工程
出版日期:
2008-01-20

文章信息/Info

Title:
Mechanical behaviors of hybrid steel fiber reinforced ultra-high performance cementitious composites
作者:
张秀芝1;  孙伟1; 2;  张倩倩1;  戎志丹1
1 东南大学材料科学与工程学院, 南京 211189; 2 江苏省土木工程材料重点试验室, 南京 211189
Author(s):
Zhang Xiuzhi1;  Sun Wei1; 2;  Zhang Qianqian1;  Rong Zhidan1
1 School of Materials Science and Engineering,Southeast University, Nanjing 211189, China
2 Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjng 211189, China
关键词:
超高性能纤维增强水泥基材料;  纤维混杂;  力学性能
Keywords:
ultra-high performance fiber reinforced cementitious composites;  hybrid fiber;  mechanical properties
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2008.01.030
摘要:
采用平直型超细钢纤维与压痕型中长钢纤维混杂,系统研究了混杂比例对超高性能水泥基复合材料(UHPCC)流动性能、力学行为的影响,以及纤维外形对界面粘结力的影响.研究表明,随压痕型钢纤维掺入量增加,新拌浆体的流动度下降; 在纤维体积率一定时,2种纤维等比例混杂,材料的抗压、拉伸、弯曲强度与弯曲韧性等力学性能为最佳; 当水胶比固定时,压痕钢纤维与基体界面粘结力大于平直型超细钢纤维.试验还表明,2种纤维混杂在不同结构、不同尺度和不同时间层次对抑制裂缝的生成和扩展分别发挥作用,两者协同作用使材料总体力学性能显著提升.
Abstract:
An experimental program was carried out to investigate the influence of hybrid fibers(straight steel fiber with smaller diameter and indented steel fiber with lager diameter)on the fluidity and mechanical behaviors of ultra-high performance fiber reinforced cementitious composites(UHPFRCC). The results show that the fluidity of fresh UHPFRCC pastes decreases with the addition of indented fibers at same water-to-binder ratio. The mechanical properties, namely, compressive strength, tensile strength, bending strength and toughness are improved more effectively by hybrid steel fibers as the volume fraction of both fibers are the same. Meanwhile, the cohesive strength between matrix and the crimped fiber is higher than that between matrix and straight fiber at given water-to-binder ratio. The results also suggest that the higher properties of UHPFRCC could be achieved as the multiscale cracks at different ages are resisted by hybrid steel fibers with different diameters and geometrical shapes, provided the volume fraction of hybrid fibers is optimized.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 张秀芝(1974—),女,博士生; 孙伟(联系人),女,教授,博士生导师,中国工程院院士,sunwei@seu.edu.cn.
基金项目: 国家基础科研资助项目(A1420060186).
引文格式: 张秀芝,孙伟,张倩倩.混杂钢纤维增强超高性能水泥基材料力学性能分析[J].东南大学学报:自然科学版,2008,38(1):156-161.
更新日期/Last Update: 2008-01-20