Specimen item

Slump (mm)

Ununiformity

Average cracking area (mm²/piece)

Per unit crack number (piece/m²)

Per unit total cracking area (mm²/m²)

J4

240

0.14

28

20.8

590

Z0

200

0.36

9

16.7

149

Z10

200

0.08

5

8.3

43

Z30

200

0.20

11

23.2

315

Z50

200

0.45

19

25.0

486