Multi-component inorganic anchoring system based on fine aluminous cement

Patent metadata

Field	Value
Publication number	US-12077475-B2
Application number	US-201917283596-A
Country	US
Kind code	B2
Filing date	Oct 2, 2019
Priority date	Oct 10, 2018
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A multi-component inorganic anchoring system, for chemical fastening of anchors and post-installed reinforcing bars in mineral substrates, includes a curable powdery aluminous cement component A and an initiator component B in an aqueous phase for initiating a curing process. The powdery aluminous cement component A includes an aluminous cement component based on powdery calcium aluminate cement and component B includes an accelerator constituent and water. Furthermore, at least part of the calcium aluminate cement of component A has an average particle size in the range of from 0.5 to 15 μm. Methods of using the calcium aluminate cement in a multi-component inorganic anchoring system to increase load values and methods for chemical fastening of anchors in mineral substrates can be performed.

First claim

The invention claimed is:

1. A multi-component inorganic anchoring system, comprising:
a curable powdery aluminous cement component A and an initiator component B in an aqueous-phase for initiating a curing process,
wherein the curable powdery aluminous cement component A comprises an aluminous cement component comprising powdery calcium aluminate cement, and
wherein initiator component B comprises an accelerator and water,
wherein at least part of the powdery calcium aluminate cement in component A has an average particle size in a range of from 0.5 to 15 μm.

2. The multi-component inorganic anchoring system according to claim 1 , wherein the powdery calcium aluminate cement having an average particle size in the range of from 0.5 to 15 μm in component A is present in a range of from 10 wt.-% to 100 wt.-%, based on total weight of component A.

3. The multi-component inorganic anchoring system according to claim 1 , wherein the accelerator in component B is present in a range of from 0.01 wt.-% to 30 wt.-%, based on total weight of component B.

4. The multi-component inorganic anchoring system according to claim 1 , wherein initiator component B further comprises a plasticizer.

5. The multi-component inorganic anchoring system according to claim 1 , wherein component A further comprises at least one additional mineral filler.

6. The multi-component inorganic anchoring system according to claim 1 , wherein component B further comprises a carbonate-source in liquid form.

7. The multi-component inorganic anchoring system according to claim 1 , wherein the multi-component inorganic anchoring system is a two-component inorganic capsule anchoring system.

8. The multi-component inorganic anchoring system according to claim 1 , wherein the powdery calcium aluminate cement in component A has an average particle size in a range of from 2.8 to 3 μm.

9. The multi-component inorganic anchoring system according to claim 1 , which is cured.

10. The multi-component inorganic anchoring system according to claim 1 , wherein said accelerator is at least one alkali and/or alkaline metal salt selected from hydroxides, chlorides, sulfates, phosphates, monohydrogen phosphates, dihydrogen phosphates, nitrates and mixtures thereof.

11. A method for chemical fastening, the method comprising:
chemical fastening of an anchor in a mineral substrate with the multi-component inorganic anchoring system according to claim 1 .

12. A method for chemical fastening of anchors and post-installed reinforcing bars in mineral substrates, wherein the method comprises:
fastening of an anchor or post-installed reinforcing bar in a mineral substrate with a multi-component inorganic anchoring system,
wherein the multi-component inorganic anchoring system comprises a curable powdery aluminous cement component A and an initiator component B for initiating a curing process,
wherein the powdery aluminous cement component A comprises an aluminous cement component comprising powdery calcium aluminate cement, and
wherein initiator component B comprises an accelerator and water,
wherein at least part of the powdery calcium aluminate cement in component A has an average particle size in a range of from 0.5 to 15 μm.

13. The method according to claim 12 , wherein the multi-component inorganic anchoring system is a two-component inorganic capsule anchoring system.

14. An anchor or post-installed reinforcing bar fastened in a mineral substrate with an anchoring system according to claim 1 , wherein the anchoring system has been cured.

15. The anchor or post-installed reinforcing bar according to claim 14 , wherein the mineral substrate comprises a structure made of brickwork, concrete, pervious concrete, or natural stone.

Assignees

• Hilti Ag

Inventors

• Pfeil Armin
• Sirch Vanessa
• Schönlein Markus
• Beroll Pascal
• Volkmer Dirk

Classifications

• C04B28/065

  Calcium aluminosulfate cements, e.g. cements hydrating into ettringite · CPC title

• C04B2111/00715

  for fixing bolts or the like · CPC title

• C04B2103/32

  Superplasticisers · CPC title

• C04B2103/12

  Set accelerators · CPC title

• C04B2103/001

  Alkaline earth metal or Mg-compounds · CPC title