Method for restoring a cementitious system

Patent metadata

Field	Value
Publication number	US-9670102-B2
Application number	US-201314759366-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Jan 7, 2013
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

Described is a method for restoring a cementitious system, the method having the following steps: a) securing a filling body provided with holes at a distance from the cementitious system to be restored, b) applying mortar to the cementitious system to be restored and to the filling body provided with openings, and c) introducing a cement containing an alkali storage system into the filling body provided with openings so that the cement containing an alkali storage system is in contact with the mortar. A corresponding cementitious system is also described.

First claim

The invention claimed is:

1. Method for restoring a cementitious system, comprising the following steps:
step a) securing a filling body provided with openings at a distance from said cementitious system to be restored;
step b) applying mortar to the cementitious system to be restored and to said filling body provided with openings, wherein the filling body provided with the openings is completely embedded in the mortar; and
step c) introducing a cement containing an alkali storage system into the filling body provided with the openings so that the cement containing an alkali storage system is in contact with the mortar.

2. Method according to claim 1 , wherein the cementitious system is mortar or concrete.

3. Method according to claim 1 , where the filling body provided with openings is a filling body with holes.

4. Method according to claim 1 , wherein the mortar used in step b) complies with the technical rules of the GGWU, working page W 300 (June 2005), working page W 270 (November 2007), and working page W347 (May 2006), and the GCRC guideline (October 2001).

5. Method according to claim 1 , wherein a cement suspension is used as the cement containing the alkali storage system.

6. Method according to claim 1 , wherein, in the cement, all particles exhibit a size of less than 20 μm.

7. Method according to claim 1 , wherein the cement is based on Portland cement or blast furnace cement.

8. Method according to claim 1 , wherein a compound containing calcium, is used as the alkali storage system.

9. Method according to claim 1 , wherein, after step b) and before step c), a customary effective surface is made available.

10. Method according to claim 1 , wherein the mortar to be applied in step b) of the invention-specific method is applied in a Colgunite process, in a dry spraying process or by manual application.

11. Method according to claim 1 , wherein the cement containing an alkali storage system is inserted in step c) using an injection technique.

12. Method according to claim 1 , wherein the cementitious system is subjected to long-duration moisture loading.

13. Method according to according to claim 1 , wherein the cementitious system is an inner surface of water containers, or an inner surface of waste water structures.

14. Cementitious system, obtainable by means of a method according to claim 1 .

Assignees

• Sika Tech Ag

Inventors

• Dünne Thomas

Classifications

• C04B2111/72

  Repairing or restoring existing buildings or building materials · CPC title

• C04B41/009 Primary

  characterised by the material treated · CPC title

• C04B41/52

  Multiple coating or impregnating {multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation} · CPC title

• E04H7/18

  mainly of concrete, e.g. reinforced concrete, or other stone-like material · CPC title

• C04B41/70

  for obtaining at least two superposed coatings having different compositions · CPC title