超声面波法在混凝土强度检测中的应用研究
杨道煌, 刘江平, 程飞, 庞凯旋
The application of ultrasonic surface wave method to concrete strength testing
Dao-Huang YANG, Jiang-Ping LIU, Fei CHENG, Kai-Xuan PANG
表3
混凝土强度等级
Table 3
Strength grades of concrete
强度种类
C15
C20
C25
C30
C35
C40
C45
C50
C55
C60
E
c
/GPa
22.0
25.5
28.0
30.0
31.5
32.5
33.5
34.5
35.5
36.0
f
cu
,
k
/MPa
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0