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山东大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (5): 42-48.doi: 10.6040/j.issn.1672-3961.0.2013.303

• 土木工程 • 上一篇    下一篇

冻融循环条件下水泥稳定风化集料抗剪强度试验研究

杨俊1,2, 杨志1,2   

  1. 1. 三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北 宜昌 443002;
    2. 三峡大学土木与建筑学院, 湖北 宜昌 443002
  • 收稿日期:2013-10-28 修回日期:2014-06-26 发布日期:2013-10-28
  • 作者简介:杨俊(1976-), 男, 湖北武汉人, 副教授, 博士, 主要研究方向为特殊土路基处理, 路面新材料开发与利用, 建筑垃圾与工业垃圾的路用性能研究.E-mail:wangjing750301@163.com
  • 基金资助:
    湖北省教育厅自然科学研究重点资助项目(D20131304)

Experimental study on shear strength of cement-treated weathered sand under the condition of freeze-thaw cycles

YANG Jun1,2, YANG Zhi1,2   

  1. 1. Collaborative Innovation Center of Geological Hazards and Ecological Environment in Three Gorges Area in Hubei Province, China Three Gorges University, Yichang 443002, Hubei, China;
    2. Civil and Architectural Institute, China Three Gorges University, Yichang 443002, Hubei, China
  • Received:2013-10-28 Revised:2014-06-26 Published:2013-10-28

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摘要： 选取质量分数分别为3%、5%、7%、9%的水泥,掺入到风化集料中,标准条件下养护7 d后,将冻融试验箱的温度调节在-15～15 ℃范围, 分别进行1、3、5、7、9次冻融循环,并在应变式直剪仪上进行直接剪切试验,得到了不同掺量的水泥稳定三峡库区风化集料内摩擦角和粘聚力经过不同次数的冻融循环作用后的变化规律。采用库仑理论计算出不同上覆荷载作用下,水泥稳定风化集料的抗剪强度变化规律,以期为三峡库区风化集料用作道路基层提供理论依据和试验指导。

关键词: 粘聚力, 内摩擦角, 水泥, 风化集料, 冻融循环, 抗剪强度

Abstract: Different content of cement was put into the weathered aggregate with the mass ratio of 3%, 5%, 7%, 9% respectively. The freezing-thawing cycles test was done 1,3,5,7,9 times separately in the freeing test chamber after 7days' standard conditions maintenance at the temperature during -15～15 ℃. Then the direct shear test was done on the strain-controlled direct shear apparatus, and the angle of internal friction and cohesive force change law was obtained for cement stabilization with weathered aggregate in China Three Gorges reservoir area after different times of freezing-thawing cycles test. Based on the Coulomb theory, the change law of shear strength of cement stabilization with weathered aggregate was calculated, which could provide theoretical basis and experiments directions for the weathered aggregate used for the subgrade in China Three Gorges reservoir area.

Key words: cohesive force, shear strength, weathered sand, freeze-thaw cycles, cement, angle of internal friction

中图分类号: 

  • TU411.3
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