Multi-component inorganic capsule anchoring system based on ground-granulated blast-furnace slag

Patent metadata

Field	Value
Publication number	US-12252447-B2
Application number	US-202117997702-A
Country	US
Kind code	B2
Filing date	May 6, 2021
Priority date	May 15, 2020
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A multi-component inorganic capsule anchoring system can be used for chemical fastening of anchors, bolts, screw anchors, screw bolts, and post-installed reinforcing bars in mineral substrates. The multi-component inorganic capsule anchoring system contains a curable powdery ground-granulated blast-furnace slag-based component A, and an initiator component B in aqueous-phase for initiating the curing process. The powdery ground-granulated blast-furnace slag-based component A contains further silica dust. The component B contains an alkali- or alkaline earth-hydroxide, alkali- or alkaline earth-carbonate, or alkali- or alkaline earth-sulfate component.

First claim

The invention claimed is:

1. A two-component inorganic capsule anchoring system for chemical fastening of anchors, bolts, screw anchors, screw bolts, and post-installed reinforcing bars in mineral substrates, comprising:
a curable powdery ground-granulated blast-furnace slag-based component A, and
an initiator component B in aqueous-phase for initiating a curing process,
wherein the powdery ground-granulated blast-furnace slag-based component A comprises silica dust,
wherein component B comprises an alkali- or alkaline earth-hydroxide, alkali- or alkaline earth-carbonate, or alkali- or alkaline earth-sulfate component,
wherein components A and B are present in a capsule and are separated within the capsule to inhibit reaction between components A and B,
wherein the capsule is a two-component inorganic plastic or foil capsule that is a capsule-in-capsule or foil-in-foil system,
wherein the A and B components are kept separate by walls or foil bags,
wherein components A and B react during the chemical fastening, and
wherein component B does not contain a filler.

2. The two-component inorganic capsule anchoring system according to claim 1 , wherein the ground-granulated blast-furnace slag-based component A comprises ground-granulated blast-furnace slag in a range of from about 10 wt.-% to about 70 wt.-%, based on a total weight of component A.

3. The two-component inorganic capsule anchoring system according to claim 1 , wherein component A further comprises a mineral filler selected from the group consisting of a limestone filler, sand, quartz, corundum, dolomite, crushed stone, gravel, pebbles, and a mixture thereof.

4. The two-component inorganic capsule anchoring system according to claim 1 , wherein component B comprises the alkali- or alkaline earth-hydroxide, alkali- or alkaline earth-carbonate, or alkali- or alkaline earth-sulfate component, which is selected from the group consisting of lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, lithium carbonate, sodium carbonate, potassium carbonate, potassium sulfate, sodium sulfate, a mixture thereof, and an aqueous solution thereof.

5. The two-component inorganic capsule anchoring system according to claim 1 , wherein component B comprises the alkali hydroxide, and wherein the alkali hydroxide is an aqueous solution of potassium hydroxide.

6. The two-component inorganic capsule anchoring system according to claim 1 , wherein the A and B components are kept separate by foil bags.

7. The two-component inorganic capsule anchoring system according to claim 1 , wherein components A and B are present in a two-component inorganic capsule anchoring system including two foil bags to inhibit reaction between components A and B.

8. The two-component inorganic capsule anchoring system according to claim 1 , wherein component A does not include an initiator component.

9. The two-component inorganic capsule anchoring system according to claim 1 , which is a foil-in-foil system including two foil bags for separating components A and B.

10. The two-component inorganic capsule anchoring system according to claim 1 , which is a plastic capsule-in-capsule system.

11. The two-component inorganic capsule anchoring system according to claim 1 , wherein component B consists of the initiator.

12. The two-component inorganic capsule anchoring system according to claim 1 , which consists of component A and component B in the capsule.

13. A chemical anchor for chemical fastening of an anchor in a mineral substrate, obtained by mixing component A and component B of the two-component inorganic capsule anchoring system according to claim 1 .

14. A method, comprising:
chemically fastening an anchor or a post-installed reinforcing bar in a mineral substrate, with the two-component multi component inorganic capsule anchoring system according to claim 1 .

15. A method of activating a powdery ground-granulated blast-furnace slag-based component for chemical fastening of an anchor in a mineral substrate, comprising:
mixing an alkali- or alkaline earth-hydroxide, alkali- or alkaline earth-carbonate, or alkali- or alkaline earth-sulfate based liquid component with the powdery ground-granulated blast-furnace slag-based component,
wherein the components are present in the two-component inorganic capsule anchoring system according to claim 1 and are separated within the capsule to inhibit reaction between components.

16. The method according to claim 15 , wherein the alkali- or alkaline earth-hydroxide, alkali- or alkaline earth-carbonate, or alkali- or alkaline earth-sulfate component is selected from the group consisting of lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, lithium carbonate, sodium carbonate, potassium carbonate, potassium sulfate, sodium sulfate, a mixture thereof, and an aqueous solution thereof.

17. A two-component anchoring system, comprising:
a curable powdery ground-granulated blast-furnace slag-based component A, and an initiator component B in aqueous-phase for initiating a curing process,
wherein the powdery ground-granulated blast-furnace slag-based component A comprises silica dust, and
wherein component B comprises an alkali- or alkaline earth-hydroxide, alkali- or alkaline earth-carbonate, or alkali- or alkaline earth-sulfate component,
wherein components A and B are present in a multi-chamber device and are separated within the device to inhibit reaction between components A and B,
wherein components A and B react during the chemical fastening, and
wherein the multi-chamber device is a plastic capsule-in-capsule or foil-in-foil, system, and
wherein component B does not contain a filler.

18. The two-component anchoring system according to claim 17 , wherein the multi-chamber device is a multi-chamber cartridge, a multi-chamber cylinder, and/or a multi-chamber capsule.

19. The two-component anchoring system according to claim 17 , wherein component A does not include an initiator component.

20. The two-component anchoring system according to claim 17 , which consists of component A and component B in the multi-chamber device.

Assignees

• Hilti Ag

Inventors

• Whittaker Mark
• Schönlein Markus

Classifications

• C04B40/0039

  Premixtures of ingredients · CPC title

• C04B28/082

  Steelmaking slags; Converter slags · CPC title

• C04B14/06

  Quartz; Sand · CPC title

• C04B7/1535

  with alkali metal containing activators, e.g. sodium hydroxide or waterglass · CPC title

• Y02P40/10

  Production of cement, e.g. improving or optimising the production methods; Cement grinding · CPC title