Additive building material mixtures containing swellable polymeric formations

Abstract

The present invention relates to the use of base-swellable polymeric formations in hydraulically setting building material mixtures for the purpose of enhancing their frost resistance and cyclical freeze/thaw durability.

Description

Claims

1. Use of polymeric formations in hydraulically setting building material mixtures, characterized in that polymeric formations which are swollen using a base and which comprise one or more crosslinkers and also one or more monoethylenically unsaturated monomers are used.

2. Use of polymeric formations according to claim 1, characterized in that the bases are selected from the group of amines, alkali metal compounds and alkaline earth metal compounds.

3. Use of polymeric formations according to claim 2, characterized in that the bases are NH3, NaOH or NH4OH.

4. Use of polymeric formations according to claim 2, characterized in that swelling takes place in the basic construction mixture.

5. Use of polymeric formations according to claim 1, characterized in that the monoethylenically unsaturated monomers are selected from the group of monomers containing an acid group.

6. Use of polymeric formations according to claim 1, characterized in that emulsifiers are used.

7. Use of polymeric formations according to claim 1, characterized in that polymeric formations of different size are used.

8. Use of polymeric formations according to claim 7, characterized in that polymeric formations of different size, with a diameter of between 10 nm and 500 μm, at least one of the sorts of polymeric formations included in the mixture having a diameter of less than 1000 nm, are included.

9. Use of polymeric formations according to claim 1, characterized in that the polymeric formations have an average particle size of 10 to 10 000 nm.

10. Use of polymeric formations according to claim 9, characterized in that the microparticles have an average particle size of 50 to 5000 nm.

11. Use of polymeric formations according to claim 10, characterized in that the microparticles have an average particle size of 80 to 1000 nm.

12. Use of polymeric formations according to claim 1, characterized in that water-soluble polymers are used.

13. Use of polymeric formations according to claim 1, characterized in that the polymeric formations are used in an amount of 0.01% to 5% by volume, based on the building material mixture.

14. Use of polymeric formations according to claim 1, characterized in that the building material mixtures are composed of a binder selected from the group of cement, lime, gypsum and anhydrite.

15. Use of polymeric formations according to claim 1, characterized in that the building material mixtures are concrete or mortar.