LIGHT-WEIGHT CONCRETE
L. Dvorkin and O.Dvorkin
Lightweight concrete is concrete with density up to 2000 kg/m3. Lightweight
concrete is divided by structure on dense, aerated, no-fine concrete and cellular
concrete.
9.1. Concrete on non-organic porous aggregates
Lightweight concrete by purpose is divided on heat insulating, structural-heat
insulating and structural (Tab.9.1). There are also special types of lightweight
concrete according to conditions of their performance – heat resistant,
decorative, corrosively resistant, etc.
Table 9.1
Technical characteristic of lightweight concrete
Density,
Compressive Heat conductivity,
Concrete
Purpose
kg/m3
strength, MPa
W/m·0C
Heat insulating
300-500
1.5-2.5 0.12-0.24 For heat insulation
Structural-heat
500-1400
3.5-10 0.17-0.40
For enclosing structures
insulating
For load-carrying
Structural 1400-1800 15-50 0.58-0.4 structures
171
Density of lightweight concrete can be expressed by the formula:
V
ρ = ρ ϕ + 1−
v
ϕ −
ρ