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硫酸镁溶液对应力作用下混凝土抗冻性的影响

张云清,  余红发,  孙伟,  刘俊龙,  张建业

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文章导航 > 交通运输工程学报  > 2010 >  10(6): 15-19
张云清, 余红发, 孙伟, 刘俊龙, 张建业. 硫酸镁溶液对应力作用下混凝土抗冻性的影响[J]. 交通运输工程学报, 2010, 10(6): 15-19. doi: 10.19818/j.cnki.1671-1637.2010.06.003
引用本文: 张云清, 余红发, 孙伟, 刘俊龙, 张建业. 硫酸镁溶液对应力作用下混凝土抗冻性的影响[J]. 交通运输工程学报, 2010, 10(6): 15-19. doi: 10.19818/j.cnki.1671-1637.2010.06.003
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ZHANG Yun-qing, YU Hong-fa, SUN Wei, LIU Jun-long, ZHANG Jian-ye. Effect of magnesium sulfate solution on frost resistance of concrete under stress condition[J]. Journal of Traffic and Transportation Engineering, 2010, 10(6): 15-19. doi: 10.19818/j.cnki.1671-1637.2010.06.003
Citation: ZHANG Yun-qing, YU Hong-fa, SUN Wei, LIU Jun-long, ZHANG Jian-ye. Effect of magnesium sulfate solution on frost resistance of concrete under stress condition[J]. Journal of Traffic and Transportation Engineering, 2010, 10(6): 15-19. doi: 10.19818/j.cnki.1671-1637.2010.06.003
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硫酸镁溶液对应力作用下混凝土抗冻性的影响

doi: 10.19818/j.cnki.1671-1637.2010.06.003
  • 1.

    南京航空航天大学 航空宇航学院, 江苏 南京 210016

  • 2.

    东南大学 材料科学与工程学院, 江苏 南京 211189

  • 3.

    浙江建设职业技术学院 建筑工程系, 浙江 杭州 311231

  • 4.

    中国土木工程集团有限公司, 北京 100038

基金项目: 

国家973计划项目 2009CB623203

中央高校基本科研业务费专项资金项目 NS2010015

江苏省自然科学基金项目 BK2005216

南京航空航天大学博士学位论文创新与创优基金项目 BCXJ07-04

详细信息
    作者简介:

    张云清(1977-), 女, 吉林九台人, 南京航空航天大学工学博士研究生, 从事混凝土结构耐久性研究

    余红发(1964-), 男, 湖北武穴人, 南京航空航天大学教授, 工学博士

  • 中图分类号: TU528

Effect of magnesium sulfate solution on frost resistance of concrete under stress condition

  • 1.

    School of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China

  • 2.

    School of Materials Science and Engineering, Southeast University, Nanjing 211189, Jiangsu, China

  • 3.

    Department of Civil Engineering, Zhejiang College of Construction, Hangzhou 311231, Zhejiang, China

  • 4.

    China Civil Engineering Construction Corporation, Beijing 100038, China

More Information
    Author Bio:

    ZHANG Yun-qing(1977-), female, doctoral student, +86-25-84895233, zhangyunqing@nuaa.edu.cn

    YU Hong-fa(1964-), male, professor, PhD, +86-25-84895233, yuhongfa@nuaa.edu

    摘要
  • 摘要: 制备了掺加20%粉煤灰的高强混凝土(HSC)、复合掺加40%粉煤灰、10%矿渣和5%硅灰的大掺量矿物掺合料混凝土(HVMAC) 和综合运用引气剂、高效减水剂、大掺量矿物掺合料、混杂纤维和膨胀剂技术的高耐久性混凝土(HDC), 采用快冻法测定了混凝土在水和5%MgSO4 (质量分数) 溶液中的抗冻性。在冻融过程中对试件采用三分点加载方式, 设定弯拉应力为破坏应力的35%。分析结果表明: 与水中冻融条件相比, MgSO4溶液分别使HSC和HDC在应力作用下的抗冻性提高了46倍和70%以上, 其抗冻融循环次数分别达到了425次以上和900次以上, 但却使HVMAC在应力作用下的抗冻性降低了67%, 抗冻融循环次数仅为75次。

     

    Abstract: The frost resistances of three kinds of concretes under flexural stress subjected to water and 5% MgSO4 (mass fraction) solution were studied by using accelerated freezing-thawing method. The considered concretes include high strength concrete (HSC) added with 20% fly ash (20% of binder mass), high-volume mineral admixture concrete (HVMAC) added with 40% fly ash, 10% slag and 5% silica fume, and high durable concrete (HDC) added with high-volume mineral admixture, air-entraining agent, superplasticizer, fibres and expansion agent. Third point loading method was applied on the specimens in the process of freezing-thawing cycle, and the enacted flexural stress was 35% of failure stress. Analysis result shows that the frost resistances of HSC and HDC respectively increase 46 times and more than 70% under flexural stress subjected to MgSO4 solution as compared with water, and their anti-freezing-thawing cycles are respectively more than 425 times and 900 times. But the frost resistance of HVMAC decreases by 67% under flexural stress, and its anti-freezing-thawing cycles are only 75 times.

     

    • HTML全文

  • 图  1  HSC试件的相对动弹性模量变化曲线

    Figure  1.  Change curves of relative dynamic elastic modulus for HSC

    下载: 全尺寸图片 幻灯片

    图  2  水中15次冻融循环后HSC试件的断裂破坏

    Figure  2.  Brittle fracture of HSC specimens subjected to water after 15 freezing-thawing cycles

    下载: 全尺寸图片 幻灯片

    图  3  HVMAC试件的相对动弹性模量变化曲线

    Figure  3.  Change curves of relative dynamic elastic modulus for HVMAC

    下载: 全尺寸图片 幻灯片

    图  4  HDC试件的相对动弹性模量变化曲线

    Figure  4.  Change curves of relative dynamic elastic modulus for HDC

    下载: 全尺寸图片 幻灯片

    表  1  原材料化学成分

    Table  1.   Chemical compositions of raw materials %
    下载: 导出CSV

    表  2  纤维的性能指标

    Table  2.   Performance indices of fibres
    下载: 导出CSV

    表  3  混凝土的配合比和性能

    Table  3.   Mixed proportions and properties of different concretes

    混凝土 材料用量/ (kg·m-3) 减水剂/% 坍落度/mm 28 d抗压强度/MPa
    水泥 粉煤灰 矿渣 硅灰 膨胀剂 砂 石子 水
    HSC 304 76 0 0 0 775 1 235 171 0.80* 65 59.5
    HVMAC 270 240 60 30 0 669 1 104 139 0.85** 80 50.7
    HDC 210 240 60 30 60 669 1 104 142 1.20** 100 60.6
    注: “*”代表JM-B型萘系高效减水剂; “**”代表HP400R型聚羧酸缓凝高效减水剂。
    下载: 导出CSV
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  • 收稿日期:  2010-07-11
  • 刊出日期:  2010-12-25

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