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

Patent metadata

Field	Value
Publication number	US-12503397-B2
Application number	US-202117998254-A
Country	US
Kind code	B2
Filing date	May 6, 2021
Priority date	May 15, 2020
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A multi-component inorganic capsule anchoring system can be used for chemically fastening 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 a curing process. The powdery ground-granulated blast-furnace slag-based component A contains further silica dust. The component B contains an alkali-silicate component and optionally a plasticizer.

First claim

The invention claimed is:

1 . A multi-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 component A comprises silica dust, wherein component B comprises an alkali-silicate-based component and, optionally, a plasticizer, wherein component A and component B are present in a multi-chamber device, and wherein the multi-chamber device is a multi-chamber cartridge, a multi-chamber cylinder, and/or a multi-chamber capsule.

2 . The multi-component inorganic capsule anchoring system according to claim 1 , wherein 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 multi-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 multi-component inorganic capsule anchoring system according to claim 1 , wherein the alkali silicate-based component comprises an alkali metal silicate selected from the group consisting of sodium silicate, potassium silicate, lithium silicate, a modification thereof, a mixture thereof, and an aqueous solution thereof.

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

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

7 . The multi-component inorganic capsule anchoring system according to claim 6 , wherein the two-component inorganic capsule anchoring system is in a form of a glass capsule.

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

9 . A method, comprising:
chemically fastening an anchor or post-installed reinforcing bar in a mineral substrate, with a multi-component inorganic capsule anchoring system, wherein the multi-component inorganic capsule anchoring system comprises: 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 component A comprises silica dust, and wherein component B comprises an alkali-silicate-based component and, optionally, a plasticizer.

10 . The method according to claim 9 , wherein the multi-component inorganic capsule anchoring system is a two-component inorganic capsule anchoring system.

11 . The method according to claim 10 , wherein the two-component inorganic capsule anchoring system is in a form of a glass capsule.

12 . The method according to claim 9 , wherein component A and component B are in a multi-chamber device.

13 . The multi-component inorganic capsule anchoring system according to claim 6 , wherein component A and component B are in different chambers in the two-component inorganic capsule.

14 . The multi-component inorganic capsule anchoring system according to claim 1 , wherein component A and component B are in different chambers of the multi-chamber device.

15 . The multi-component inorganic capsule anchoring system according to claim 14 , wherein the multi-chamber device is a multi-chamber capsule.

16 . The multi-component inorganic capsule anchoring system according to claim 15 , wherein the multi-chamber device is a two-component inorganic capsule including two foil bags which separate components A and B.

17 . The method according to claim 10 , comprising mixing together the contents of the capsules by inserting the inorganic anchoring system into a borehole, thereby destroying the capsule and mixing component A and B.

18 . A multi-component inorganic capsule 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 component A comprises silica dust, wherein component B comprises an alkali-silicate-based component and, optionally, a plasticizer, wherein component A and component B are present in a multi-chamber device, and wherein component A comprises 1 to 10 wt. % of silica dust and 20 to 60 wt. % of ground-granulated blast furnace slag, and 10 to 70 wt. % of a mineral filler, based on the total weight of component A.

19 . The multi-component inorganic capsule anchoring system according to claim 18 , wherein the mineral filler comprises sand and quartz powder.

20 . The multi-component inorganic capsule anchoring system according to claim 19 , wherein the alkali silicate-based component is an aqueous solution of potassium silicate and potassium hydroxide.

Assignees

• Hilti Ag

Inventors

• Schönlein Markus
• Pfeil Armin
• Middendorf Bernhard
• Schade Tim
• Wetzel Alexander

Classifications

• C04B2111/00715

  for fixing bolts or the like · CPC title

• C04B40/065 Primary

  Two or more component mortars · CPC title

• Y02P40/10

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

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C04B28/006 Primary

  containing mineral polymers, e.g. geopolymers of the Davidovits type · CPC title