Method for producing cement grouts with decreased shrinkage and the cement grout with decreased shrinkage

摘要

The purpose of the notification is to provide for the production of reduced -shrinking cement and reduced -shrinking cement starters. That way is,that the cement was gone,with silicon material MCM -41,the quantity of which is from 1 to 2% in relation to the total weight of cement,i.e. per kilogram of cement falls 0,01 -0,02 kg of silicon material MCM -41. In addition to the dry mixture of cement and silicon material MCM -41, the commercial (aqueous) water in such quantity is added,that the ratio of the water mass to the cement (w /c) is 0,4 to 0,5 -positive 0,5,i.e. per kilogram of cement falls 0,4 -0,5 kg of water -favourable 0,5 kg;then mixes and thickens the cement beginning. The cement start contains cement ground with silicon material MCM -41 in quantities from 1%to 2% in relation to the mass of cement in the cement start,i.e. per kilogram of cement falls 0,01 -0,02 kg of silicon material MCM -41,and tap water in such quantity,that the ratio of the water mass to the cement (w /c) is 0,4 to 0,5 -positive 0,5,i.e. per kilogram of cement falls 0,4 -0,5 kg of water -favourable 0,5 kg.