Group

W/B

Cracking area (mm²)

Number of cracks (条)

The maximum width of cracks (mm)

Average cracking area A (mm²/条)

The number of cracks in unit area B (条/m²)

Total area of the cracks in the unit area C (mm²/m²）

WB36

0.36

370.2

19

0.32

9.74

40

386

JZ

0.33

274.9

21

0.24

6.55

44

286

WB30

0.30

210.0

24

0.24

4.38

50

219