文档介绍：Foamed Concrete
Major : Structural Engineering
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Types
Properties
Producing
process
Application
Developing direction
Mechanical
property
Composition
Foamed
Concrete
Definition
Foamed concrete is one kind of lightweight porous materials. It makes foaming agent aqueous preparation into foam by physical method, then add the foam into slurry which have mixed cement-based cementitious material, aggregate, admixture, additives and water etc, after that, mixed stirring, casting molding, curing in natural or steam.
Figure 1 Foamed concrete
Figure 2 The sectional view of foamed concrete
Classified by
Cementing Material
Cement
Magnesite
Gypsum
Volcano calcareous cement
Classified by Padding
Coal ash foamed concrete scoria foamed concrete
Straw foamed concrete,etc
Classified by
Function
Temperature retention Temperature retention structural Structural
Classified by
Application
Building
Gardens
Engineering
Industrial
Classified by
Curing Method
natural curing
Steam curing
Steam pressure curing
Cementing Materials
Cement、Coal ash、Kalk、Gypsum
Aggregate
Expanded perlite、Cab-O-sil 、Pumice、Scoria、Light ceramic material 、EPS granule,etc
Additive
Water-reducing agent、waterproofing agent、retarder、coagulant
Fiber
PP fibers、 Alkali-resistant glass fibers 、 High strength and high modulus PVA fibers
Foam
Wet foam: The bubble size is 2~5 mm, and instability relatively;
Dry foam: The bubble size is less than 1 mm, and stability relatively.
Water
Ordinary water
Domestic: Rosin size foaming 、animal’s useless fair foaming、 Aerating Powder 、resin soap foaming、 Norlig foaming, These foaming agents are less function, poor stability and low strength. In recent years, China has developed a number of good solid resin foam agent and protein foaming agent, such as CON-A foaming, CCW-95 solid foaming,U-foaming,HJ-3 sulfonate series microbubble agent
Three important quotas of Aerating Powder
Expansion rate of foam
Subsidence