不同龄期C80混凝土力学性能研究

通过对C80高强商品混凝土力学性能试验,对C80高强商品混凝土不同龄期的力学性能进行研究。研究了龄期为12 h和1,3,7,14,28,90 d时混凝土立方体抗压强度、轴心抗压强度、劈裂抗拉强度、静力受压弹性模量和单轴应力-应变全过程等性能指标,并分析各项性能指标随龄期增长变化规律,探索C80高强混凝土早期强度(7 d前)和超早期强度(3 d前)变化规律,得出各龄期下立方体抗压强度和弹性模量的计算公式。

STUDY ON MECHANICAL PROPERTIES OF C80 CONCRETE AT DIFFERENT AGES

It was studied the mechanical behaviors of C80 high-strength commercial concrete at different ages,based on the test of C80 high-strength commercial concrete specimens.It was also studied a variety of performance indicators such as the cube compressive strength,axial compressive strength,splitting tensile strength,static elastic modulus and the whole process of uniaxial stress-strain of concrete and so on at the age of 12 h,1,3,7,14,28 and90 d.It was analyzed the variation of performance index with age growth and explored the variation of early strength7 d ago) and ultra-early strength 3 d ago of C80 high-strength concrete.At last,the paper obtained formulas of cube compressive strength and elastic modulus of C80 high-strength concrete at any age.