冻融作用下混凝土性能的变化规律

通过试验研究不同强度的混凝土在冻融循环下其动弹性模量、静弹性模量和轴心抗压强度随冻融次数的变化规律，并结合理论分析，分析出冻融次数与混凝土梁的曲率、抗弯强度之间的关系。研究显示，冻融作用不仅使混凝土性能从材料层面产生劣化，并且进一步从结构角度上影响着混凝土建筑的使用功能，因此，有必要从材料和结构双方面对混凝土的受冻劣化标准进行规范。

Variation of properties of concretes subjected to freeze-thaw cycles

The variation of properties of concretes including dynamic modulus of elasticity, static modulus of elasticity and axial compressive strength subjected to freeze-thaw cycles was investigated. Combined with theoretical analysis, the ralationship between freeze-thaw cycles, curvature and bending strength of concrete beam were summarized .Research shows, freeze-thaw action not only makes the concrete performance degradation from the material level. Further, the function of concrete construction was also influenced from structural perspective. Therefore,it is necessary to regulate frost deterioration standard of concrete from materials and structures.