Creep Characteristics of Cement Emulsified Asphalt Mortar under Long-Term Load

被引：0
|
作者：
Song H. [1 ]
Zeng X. [1 ]
Xie Y. [1 ]
Long G. [1 ]
Fu Q. [2 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 02期
关键词：
Cement emulsified asphalt mortar(CA mortar); Concrete; Creep; Load; Stress level;
D O I：
10.3969/j.issn.1007-9629.2020.02.005
中图分类号：
学科分类号：
摘要：
The creep of cement emulsified asphalt mortar(CA mortar) loaded for 3 years was tested continuously. The influence of stress levels on the creep and creep degree of CA mortar was analyzed, and the mechanical properties and pore structure of CA mortar after creep were analyzed. The results show that the creep rate of CA mortar is much faster than that of ordinary concrete. The CA Mortar with a stress level of 0.5 is 3-4 times that of ordinary concrete in 10d, and the degree of creep of CA mortar is several dozen times that of ordinary concrete. The stress level has a serious impact on the creep of CA mortar. When the stress level is low, the creep does not increase after 300d, but at high stress level, the creep still increase significantly in the late stage. The strength of CA mortar after creep has increased, and the deformation ability of type Ⅱ CA mortar has been significantly degraded. The long-term bearing capacity of type Ⅱ CA mortar is only about 40% of the compressive strength. The creep also changes the pore structure of CA mortar, and the stress level has a great influence on the pore structure evolution. This may be related to the viscous flow of asphalt, interface slip, and water migration under long-term load. © 2020, Editorial Department of Journal of Building Materials. All right reserved.
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页码：271 / 278
页数：7
相关论文
共 18 条
  • [11] The Creep of Structural Concrete: Report of a Working Party of the Materials Technology Divisional Committee, (1973)
  • [12] Zhao Z., Creep, relaxation and elasticity of concrete, Acta Mechanica Sinica, 3, pp. 2-11, (1962)
  • [13] Hui R., Creep of Concrete, (1988)
  • [14] Deng D., Civil Engineering Materials, pp. 252-253, (2010)
  • [15] Iwasaki K., Properties of Concrete, pp. 67-68, (1980)
  • [16] Song H., Xie Y., Long G., Advances in cement emulsified asphalt mortar, Materials Review, 32, 5, pp. 836-846, (2018)
  • [17] Chen Z., Zhang Y., Zhou H., Concrete creep model based on equivalent time, Journal of Hohai University(Natural Sciences), 39, 3, pp. 302-305, (2011)
  • [18] Yang X., Research on prediction model of concrete shrinkage and creep, (2004)
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