【摘要】 介绍了一套高性能混凝土的约束收缩试验方法。用这种方法可以在试验室确定混凝土或砂浆的开裂龄期,以及因收缩被约束而产生的拉应力。试验采用了一套装有应变计的环形装置来分析混凝土在早龄期受拉时的力学行为。文中论述了混凝土约束收缩的测量方法和自生拉应力、弹性应变和徐变的量化的数学计算方法。更多还原

【Abstract】 A test method for restrained shrinkage of high performance concrete is introduced.This test method covers the laboratory determination of the age at cracking and induced tensile stress of mortar or concrete.A ring setup instrument with strain gages was used to evaluate the tensile behaviors of concrete at early ages.The calibration procedure to determine the restrained shrinkage and the mathematical models to quantify the tensile stress,elastic strain and tensile creep are expounded.更多还原