CHAPTER 9

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

