欢迎访问《建筑材料学报》编辑部网站！

引用本文:	杨博瀚,翁兴中,刘军忠,寇雅楠,付婕,姜乐,李洪磊.改性聚丙烯纤维和水泥加固黄土的力学性能[J].建筑材料学报,2016,19(4):694-701

【打印本页】【下载PDF全文】【查看/发表评论】【EndNote】【RefMan】【BibTex】

←前一篇|后一篇→

过刊浏览高级检索

本文已被：浏览 524次下载 0次	码上扫一扫！
分享到：微信更多字体:加大+\|默认\|缩小-
改性聚丙烯纤维和水泥加固黄土的力学性能
杨博瀚¹, 翁兴中¹, 刘军忠¹, 寇雅楠¹, 付婕², 姜乐¹, 李洪磊¹
1.空军工程大学机场建筑工程系,陕西西安710038;2.空军勤务学院航空军需系,江苏徐州221000

摘要:

为研究改性聚丙烯纤维和水泥加固黄土的力学性能，通过无侧限抗压强度试验和劈裂抗拉强度试验，对不同纤维掺量、水泥掺量、养护龄期和纤维长度的试件在浸水和未浸水条件下的力学性能进行研究.结果表明：改性聚丙烯纤维和水泥的共同加固作用对提高黄土的早期无侧限抗压强度贡献最大，3d龄期的无侧限抗压强度达365～599MPa；随着水泥掺量的增大，试件呈现明显的脆性破坏特征，纤维的掺入可改善试件的脆性破坏模式；随着纤维掺量的增大，试件破坏特征呈现由脆性破坏向延性、塑性破坏过渡的趋势；改性聚丙烯纤维加筋水泥稳定土的最佳纤维掺量为030%～045%（质量分数），最佳纤维长度为12mm.由破坏性状分析可知，水泥稳定土试件受压易产生脆裂破坏，改性聚丙烯纤维在水泥稳定土中的“桥梁”连接作用使得加固试件受压破坏时的整体性较好.

关键词: 纤维加筋土水泥稳定土黄土力学性能破坏性状

DOI：103969/j.issn1007 9629201604015

分类号:

基金项目:国家自然科学基金资助项目（51478462）；横向科研基金资助项目（050101）

Mechanical Properties of Modified Polypropylene Fibre Reinforced Cement Stabilized Loess

YANG Bohan¹, WENG Xingzhong¹, LIU Junzhong¹, KOU Yanan¹, FU Jie², JIANG Le¹, LI Honglei¹

1.Department of Airfield and Building Engineering, Air Force Engineering University, Xian 710038, China;2.Department of Aviation Military Supplies, Air Force Service Academy, Xuzhou 221000, China

Abstract:

In order to investigate the strength properties of modified polypropylene fibre reinforced cement stabilized loess, the unconfined compressive strength（UCS） test, the splitting tensile strength（STS） test had been carried out with different fibre content, cement content and curing period in dry or soaking condition. The results show that the consolidation of fibre and cement makes the biggest contribution to improve the early strength of loess and the strength can reach 365MPa to 599MPa after 3d curing period; the optimum fibre content should be 030%045%（by mass） and the optimum fibre length is 12mm, at which point the modified polypropylene fibre reinforced effect on unconfined compressive strength and tensile strength can be the best; with the increase of cement content, the loess specimens show a clear brittle failure, but the fibre inclusion can change the cement stabilized loess failure mode from brittle failure to ductile and plastic one. The failure shape and properties analysis show that the fibre plays the role of the bridge and the connection effect can keep the compression broken specimen integrated.

Key words: fibre reinforced soil cement stabilized loess loess mechanical property failure shape and property