Concrete Slab
From Captain of Industry Wiki
The Concrete Slab is a crafted material which is used in the production of Construction Parts. It is created by combining Cement and with either Sand and Slag Crushed, or Sand and Gravel.
Concrete Slab is a good alternative to 
Bricks, particularly mid- to late-game as the higher tier Concrete Mixer offers higher production rates.
Applications in building
In addition to being an ingredient in Construction Parts, Concrete Slabs are also a required material to build the following machines:
Recipes
Below are all the recipes, which contain this item. Note, that some of them may be locked behind Research, and not immediately available in your game.
Production
Tier I:
1
1.5
2
3
6
9
4
6
40 
60 
8
12
Tier I:
1
1.5
2
3
6
9
4
6
40
60
8
12
Tier I:
1
1.5
2
3
6
9
4
6
40
60
8
12
Tier I:
1
1.5
2
3
6
9
4
6
40
60
8
12
Tier II:
1
3
2
6
6
18
4
12
20
60
8
24
Tier II:
1
3
2
6
6
18
4
12
20
60
8
24
Tier II:
1
3
2
6
6
18
4
12
20
60
8
24
Tier II:
1
3
2
6
6
18
4
12
20
60
8
24
Tier III:
2
6
4
12
12
36
8
24
20
60
16
48
Tier III:
2
6
4
12
12
36
8
24
20
60
16
48
Tier III:
2
6
4
12
12
36
8
24
20
60
16
48
Tier III:
2
6
4
12
12
36
8
24
20
60
16
48
:
12
18
2
3
4
6
40
60
8
12
8
12
Consumption
:
3
4.5
3
4.5
4
6
40
60
4
6
:
3
9
3
9
4
12
20
60
4
12
:
2
8
1
4
15
60
4
16
:
3
18
3
18
4
24
10
60
4
24
:
2
12
2
12
4
24
10
60
4
24
:
4
16
2
8
15
60
8
32
:
6
36
6
36
8
48
10
60
8
48
:
4
24
4
24
8
48
10
60
8
48
:
8
32
4
16
15
60
16
64
:
12
72
12
72
16
96
10
60
16
96
:
8
48
8
48
16
96
10
60
16
96
