soundness test of cement

5:14

13:02

4:38

4:20

17:17

3:20

9:16

10:59

2:29

3:10

3:05

2:56

2:23

3:13

2:30

2:46

2:54

2:16

3:21

4:05

2:42

1:48

3:28

2:07

3:43

7:37

1:41

3:19

4:01

2:26

4:32

2:57

2:04

2:21

21:18

3:20

6:33

4:17

1:33

2:28