摘要
在高强混凝土强度检测中 ,重型回弹仪检测结果反映的不是混凝土试件表面硬度与强度关系 ,而是其内部结构与强度的关系 ;增大冲击能量却使回弹值降低·普通回弹仪检测结果反映了混凝土试件硬度与强度间相关关系 ,试验测强曲线具有较好统计特征并与实测值吻合 。
The applicability of the normal and heavy rebound instruments for measuring the strength of high strength concrete were discussed. The difference of the ratio of energy discharge of concrete cubes, especially, obtained from the two types of rebound instruments were thoroughly considered. The rebound values decrease as the pulse energy increases in the tests. The rebound values measured from heavy instruments do not represent the inherent relationship between surface hardness and strength of specimens. The strength rebound regression equation with a lot higher correlation coefficient and precision of high strength concrete in different models shows that the applicability of a normal rebound instrument for measuring the strength of high strength concrete is fully confirmed.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第5期474-476,共3页
Journal of Northeastern University(Natural Science)
基金
辽宁省科学技术基金资助项目 (962 160 )
关键词
高强混凝土
回弹法
重型回弹仪
普通回弹仪
回归统计
测强曲线
high strength concrete
rebound method
heavy rebound instrument
light rebound instrument
regression analysis
strength-rebound values regression equation
