COMPOSITION FOR BUILDING MATERIALS HAVING IMPROVED FREEZE THAW RESISTANCE AND PROCESS FOR THE PRODUCTION THEREOF

摘要

The invention relates to a hydraulically curable composition in particular for producing concrete mortar screed or render having improved freeze thaw resistance which comprises the constituents cement additives organofunctional silicon compounds and optionally aggregates and optionally further constituents and which contains the further constituents fly ash and silica dust in each case independently in an amount based on the weight of cement of from 1 to 25% by weight and the organofunctional silicon compounds in an amount of from 0.1 to 5% by weight based on the weight of cement. The invention further relates to a process for producing the composition and also to the use of the combination of constituents for improving the freeze thaw resistance.