[1]郭丽萍,陈波,孙伟,等.骨料类型及纤维对高延性水泥基复合材料性能的影响[J].东南大学学报(自然科学版),2017,47(6):1221-1226.[doi:10.3969/j.issn.1001-0505.2017.06.022]
 Guo Liping,Chen Bo,Sun Wei,et al.Effects of aggregate type and fibre on properties of high ductility cementitious composites[J].Journal of Southeast University (Natural Science Edition),2017,47(6):1221-1226.[doi:10.3969/j.issn.1001-0505.2017.06.022]
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骨料类型及纤维对高延性水泥基复合材料性能的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第6期
页码:
1221-1226
栏目:
其他
出版日期:
2017-11-20

文章信息/Info

Title:
Effects of aggregate type and fibre on properties of high ductility cementitious composites
作者:
郭丽萍12陈波3孙伟1谌正凯1张文潇3
1东南大学材料科学与工程学院, 南京 211189; 2东南大学江苏省土木工程材料重点实验室, 南京 211189; 3南京水利科学研究院水文水资源与水利工程科学国家重点实验室, 南京 210029
Author(s):
Guo Liping12 Chen Bo3 Sun Wei1 Chen Zhengkai1 Zhang Wenxiao3
1School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
3State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China
关键词:
骨料 纤维 延性 弯曲韧性 抗冲磨 金刚砂
Keywords:
aggregate fibre ductility toughness abrasion resistance carborundum
分类号:
TV431
DOI:
10.3969/j.issn.1001-0505.2017.06.022
摘要:
为了研究骨料类型及纤维对高延性水泥基复合材料(HDCC)性能的影响,分别采用普通河砂和金刚砂作骨料,添加聚乙烯醇(PVA)纤维,或PVA与微细镀铜钢混杂纤维,制备了4组HDCC,试验研究了HDCC的抗折与抗压强度、弯曲韧性、单轴拉伸性能、抗冲磨性能,并采用扫描电镜观察了HDCC拉伸破坏后PVA纤维的微观形貌.结果表明:骨料对HDCC抗折强度影响较为明显,而对抗压强度、弯曲韧性和抗冲磨性能影响不显著;微细钢纤维对HDCC抗折、抗压强度、弯曲韧性和抗冲磨性能的增强效果比较明显;在不同的HDCC体系中,微细钢纤维对延性影响的规律略有差异,以天然河砂为骨料时,掺加微细钢纤维会降低HDCC的延性,以金刚砂为骨料时,掺加微细钢纤维则会提高HDCC的延性;金刚砂提高了HDCC的抗拉强度,但显著降低了延性.
Abstract:
To investigate the effects of aggregate type and fibre on the properties of high ductility cementitious composite(HDCC), four series of HDCCs were prepared. The HDCCs used ordinary river sand and carborundum as aggregates, and used polyvinyl alcohol(PVA)fibre and PVA and micro-copper-coated steel hybrid fibres as reinforced fibres. The flexural and compressive strength, flexural toughness, uniaxial tensile properties and abrasion resistance were studied. The morphology of PVA fibre of tensile test specimens was observed by the scanning electron microscopy. The results show that the effect of aggregates on flexural strength is obvious, but the effects on compressive strength, bending toughness and abrasion resistance are not significant. Micro-steel fibre has an evident effect on flexural strength, bending toughness and abrasion resistance. The effect of micro-steel fibre on the ductility depends on the aggregate of HDCC. When the natural river sand is used as aggregate, the micro-steel fibre reduces the ductility of HDCC; while the carborundum is used as aggregate, the micro-steel fibre improves the ductility of HDCC. The carborundum increases tensile strength, but significantly reduces the ductility of HDCC.

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备注/Memo

备注/Memo:
收稿日期: 2017-05-18.
作者简介: 郭丽萍(1979—),女,博士,副教授,博士生导师, guoliping691@163.com.
基金项目: 国家重点研发计划资助项目(2016YFC0401610)、国家自然科学基金资助项目(51378113,51438003)、江苏省自然科学基金资助项目(BK20151072)、江苏省六大人才高峰B类资助项目(JZ-004).
引用本文: 郭丽萍,陈波,孙伟,等.骨料类型及纤维对高延性水泥基复合材料性能的影响[J].东南大学学报(自然科学版),2017,47(6):1221-1226. DOI:10.3969/j.issn.1001-0505.2017.06.022.
更新日期/Last Update: 2017-11-20