Time-dependent Early-age Behaviors of Concrete under Restrained Condition

武汉理工大学学报-材料科学版(英文版), 2007, 22(2): 350-353.

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150006, China

2.Department of Applied Chemistry, Harbin Institute of Technology,Weihai 264209, China

3.Department of Civil Engineering, University of Toronto, Toronto M5S1N4, Canada

4.Department of Civil Engineering, University of Toronto, Toronto M5S1N4, Canada

5.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150006, China

基金项目: 国家自然科学基金(50678054)

Time-dependent Early-age Behaviors of Concrete under Restrained Condition

Keywords： shrinkage

To investigate the early-age behaviors of concrete under a restrained condition, a set of apparatus was developed. In this way, the tensile creep and other early-age properties can be investigated in depth. By measuring the modulus of elasticity of concrete, synchronous shrinkage of concrete and steel rings and free shrinkage of concrete, the deformations of concrete ring can be quantified respectively. The experimental results show the tensile stress in concrete is time-dependent, and the stress at cracking is much lower than the tensile strength at that age; the tensile creep plays an important role in relaxing the tensile stress and postponing the cracking of concrete.

参考文献

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Time-dependent Early-age Behaviors of Concrete under Restrained Condition

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