STABILMAC is an inorganic product in powder form to be used in addition to the other components of concrete for producing shrinkage-compensating concrete. It is a special clinker, burnt at high temperature, rich in free lime and whose minor compounds are calcium silicates, aluminates, ferroaluminates and sulphates. When the calcium oxide comes in contact with the mix water it transforms into calcium hydroxide which causes an expansion. This expansion can be stored by an internal or an external restraint and can thus be used for compensating the subsequent shrinkage of the concrete.
The clinkering temperature of STABILMAC , its particle size and distribution and the presence of the minor compounds coating the calcium oxide enable the hydration rate and therefore, the expansive process to be properly regulated. The suggested dosage rate of STABILMAC is 10 to 40 kg/m3 of concrete. It must be added together with the cement and aggregates and then water and other admixtures. It is compatible with admixtures of the Glenium , Rheobuild , Pozzolith and Micro Air line of products.
The use of superplasticisers is particularly recommended when using Stabilmac as they significantly reduce the water content and thus the potential shrinkage of the concrete to be compensated.
Curing compounds such as Masterkure and concrete floor hardeners such as Mastertop 200 and Mastertop 100 may be used in conjunction with Stabilmac.