Table 8 Bond coefficient of the BS.

From: Investigation of the shear performance of multi-key block bonding surfaces without connecting reinforcement for precast elements

Category

Type of BS

Roughness

c

µs

1

M3, W

Rt≥4 mm

0.97

2.32

2

M2, T, M1

3 mm ≤ Rt<4 mm

0.69

2.25

3

CJ, PSP

Rt<3 mm

0.54

1.80