Properties of Foam Concrete

Characteristic
Type of foam concrete (cast density)
Unit
Cast density
400
500
600
700
800
900
1,000
1,200
1,400
1,600
kg/m3
Cube compressive strength (28 days)
0.5
1.0
2.0
2.5
3.0
3.5
4.0
6.0
8.0
10.0
N/mm2
- attainable maximum (28 days)
1.3
2.0
3.0
3.0
4.5
5.5
6.5
10.0
12.0
16.0
N/mm2
Tensile strength (28 days)
0.05
0.10
0.20
0.25
0.30
0.35
0.40
0.60
0.80
1.0
N/mm2
- attainable maximum (28 days)
0.10
0.20
0.30
0.35
0.45
0.55
0.65
1.10
1.2
1.6
N/mm2
Flexural strength (28 days)
0.10
0.15
0.35
0.44
0.50
0.60
0.70
1.10
1.45
1.85
N/mm2
Modulus of elasticity
(compression, 28 days)
300
650
1,200
1,850
2,200
2,800
3,700
5,800
8,400
11,500
N/mm2
Shrinkage (laboratory)
5.5
5.5
4.5
4.5
4.0
4.0
3.5
2.5
2.0
1.5
%
Shrinkage (in actual practice)
1.5
1.3
1.2
1.2
1.2
1.1
1.1
1.0
1.0
1.0
%
Water absorption*
75
50
33
22
15
10
7
5
5
5
kg/m2
Water vapour diffusion resistance factor
- between 50% - 100% RH
2.5
3.5
4.0
4.5
5.5
6.0
6.5
9.0
13.0
18.0
-
- between 70% - 100% RH
5.0
6.0
7.0
8.0
9.0
10.0
12.0
18.0
24.0
34.0
-
Heat conduction on coefficient
- absolutely dry material
0.09
0.10
0.12
0.14
0.17
0.20
0.23
0.30
0.40
0.50
W/mk
- at 70% RH
0.11
0.13
0.15
0.18
0.22
0.26
0.30
0.40
0.55
0.70
W/mk
- at 95% RH
0.14
0.17
0.20
0.23
0.27
0.31
0.35
0.50
0.55
0.80
W/mk

* The guide value indicates the total quantity of water (in kg), that permeates a 1m2 foam concrete surface over ten years, if this surface is constantly exposed to (ground)water with the same pressure as a one metre water column.