definition
strict definition
cementitious foam
Thermal and acoustic insulation formed from magnesium oxide cement with air pockets introduced during foaming.
Cementitious foam is a form of insulation composed of magnesium oxide cement with air pockets from the blowing process. The magnesium oxide can be derived from seawater. The material is used for thermal and acoustic insulation and is noncombustible. The foam is fragile and usually requires a protective covering.
The cellular cement body is the insulating material. It is distinct from a plastic foam even though both contain many small gas-filled spaces.
The foam can reduce sound transmission as well as heat flow. A covering protects the fragile cellular material from mechanical damage.
Related definitions
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cellulose spray
A mass of fine particulate plant fiber sprayed into wall and roof cavities for thermal insulation. -
phenolic foam
Phenolic polymer foam applied in place within wall or roof cavities for thermal insulation. -
polyethylene foam
Thermal insulation made from polyethylene plastic foam containing gas-filled cavities. -
polyisocyanurate foam
Insulating foam made from polyisocyanurate, a plastic similar to polyurethane. -
polyurethane foam
Insulating foam made from polyurethane and sprayed onto a surface or into a cavity. -
urea-formaldehyde foam
Sprayed insulation consisting of urea-formaldehyde, a yellowish synthetic resin.