院报 ›› 2017, Vol. 34 ›› Issue (9): 145-149.DOI: 10.11988/ckyyb.20160523

• 水工结构与材料 • 上一篇    下一篇

水泥砂浆受硫酸钠侵蚀时力学特性的尺寸效应研究

熊良宵1, 2, 3, 陈聪4   

  1. 1.中国电建集团中南勘测设计研究院有限公司 水能资源利用关键技术湖南省重点实验室, 长沙 410014;
    2.成都理工大学 地质灾害防治与地质环境保护国家重点实验室, 成都 610059;
    3.宁波大学 建筑工程与环境学院, 浙江 宁波 315211;
    4.武汉地铁集团有限公司, 武汉 430070
  • 收稿日期:2016-05-25 出版日期:2017-09-01 发布日期:2017-09-28
  • 作者简介:熊良宵(1982-),男,江西九江人,副教授,博士,主要从事岩石与混凝土材料力学的研究工作,(电话)028-84078874(电子信箱)xionglx1982@126.com。
  • 基金资助:
    水能资源利用关键技术湖南省重点实验室开放研究基金项目(PKLHD201405)

Size Effect on Mechanical Properties of Cement MortarCorroded by Sodium Sulfate Solution

XIONG Liang-xiao1, 2, 3, CHEN Cong4   

  1. 1.Hunan Provincial Key Laboratory of Hydropower Development Key Technology, Power China ZhongnanEngineering Corporation Limited, Changsha 410014, China;
    2.State Key Laboratory of GeohazardPrevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;
    3.Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China;
    4.Wuhan Metro Group Co., Ltd.,Wuhan 430070, China
  • Received:2016-05-25 Online:2017-09-01 Published:2017-09-28

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摘要： 为了解水泥砂浆试件经海水侵蚀时的尺寸效应,分别采用3种尺寸的正方体试件放在硫酸钠溶液中侵蚀,后每隔一定时间取出部分试件进行单轴压缩试验,分析不同尺寸试件的单轴抗压强度、峰值应变和弹性模量的差异。研究结果表明试件经硫酸钠侵蚀时强度的尺寸效应存在一个临界值,随着试件尺寸的增加,侵蚀对强度的影响效应会呈现增加后减小的规律;不同尺寸的试件经硫酸钠侵蚀时,其峰值应变和弹性模量的差异没有强度的差异明显。

关键词: 水泥砂浆, 硫酸钠, 尺寸效应, 抗压强度, 峰值应变

Abstract: To study the size effect on the mechanical properties of cement mortar corroded by sodium sulfate solution, uniaxial compression tests were carried out on cement mortar specimens of three different sizes being corroded for a certain time in sodium sulfate solution. The differences of specimens in uniaxial compressive strength, strain at peak stress and elastic modulus were analyzed. The research result shows that the effect of erosion on the uniaxial compressive strength increased first and then decreased with the size of specimen reaching a critical value. The differences of strain at peak stress and elastic modulus were less significant than uniaxial compressive strength.

Key words: cement mortar, sodium sulfate, size effect, compressive strength, strain at peak stress

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