using sand and cement ratio

1:03

3:55

5:36

6:58

2:35

3:06

6:14

10:46

7:06

8:14

4:10

4:40

7:16

5:16

13:42

15:27

5:41

4:35

3:20

7:51

3:49

8:20

8:27

9:31

9:04

1:38

6:26

7:39

7:06

3:35

3:36

12:05

9:34

10:44

10:42

2:56

5:55

00:29

11:07

6:31

2:34

5:24

1:48

7:53

9:02

7:28

15:03

14:30

4:05

8:34

10:46

13:42

5:36

4:10

1:35

14:04

7:01

8:18

5:27

5:33