Finely ground portland cement clinker in a cementitious multi-component mortar system for use as an inorganic chemical fastening system

Patent metadata

Field	Value
Publication number	US-12590033-B2
Application number	US-202117997002-A
Country	US
Kind code	B2
Filing date	May 6, 2021
Priority date	May 15, 2020
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A cementitious multi-component mortar system contains finely ground Portland cement clinker with a grinding fineness in the range of from 6,000 to 12,000 cm 2 /g. The cementitious multi-component mortar system can be used as an inorganic chemical fastening system for anchoring elements in mineral substrates.

First claim

The invention claimed is:

1 . A cementitious multi-component mortar system for inorganic chemical fastening of anchoring elements in mineral substrates, comprising:
finely ground Portland cement clinker with a grinding fineness in a range of from 6,000 to 12,000 cm 2 /g, a sulfate carrier selected from the group consisting of calcium sulfate, sodium sulfate, lithium sulfate, magnesium sulfate, and potassium sulfate, wherein the sulfate carrier is a mixture of anhydrite and hemihydrate, silica fume, wherein the cementitious multi-component mortar system is a two-component capsule mortar system, and a mortar prepared from said cementitious multi-component mortar system has an internal strength of 4.5-20.7 N/mm 2 .

2 . The cementitious multi-component mortar system according to claim 1 , further comprising at least one mineral filler selected from the group consisting of quartz, sand, quartz powder, clay, fly ash, granulated blast-furnace slag, a pigment, a titanium oxide, a light filler, a limestone filler, corundum, dolomite, alkali-resistant glass, crushed stone, gravel, pebbles, and a mixture thereof.

3 . The cementitious multi-component mortar system according to claim 1 , wherein the sulfate carrier is present with a grinding fineness in the range of from 6,000 to 12,000 cm 2 /g.

4 . The cementitious multi-component mortar system according to claim 1 , wherein the sulfate carrier is calcium sulfate dihydrate, calcium sulfate anhydrite, calcium sulfate hemihydrate, or a mixture thereof.

5 . The cementitious multi-component mortar system according to claim 1 , wherein the finely ground Portland cement clinker is present in a range of from 1 wt. % to 50 wt. %, based on a total weight of a binder component of the cementitious multi-component mortar system.

6 . The cementitious multi-component mortar system according to claim 1 , wherein the sulfate carrier is present in a range of from 1 wt. % to 6 wt. %, based on a total weight of a binder component of the cementitious multi-component mortar system.

7 . The cementitious multi-component mortar system according to claim 1 , wherein the silica fume is present in a range of from 1 wt. % to 10 wt. %, based on a total weight of a binder component of the cementitious multi-component mortar system.

8 . The cementitious multi-component mortar system according to claim 1 , wherein the sulfate carrier is the mixture of anhydrite and hemihydrate with a wt. % ratio of 1.5:1.

9 . The cementitious multi-component mortar system according to claim 1 , wherein the two-component mortar system comprises:
a powdered A component, comprising the finely ground Portland cement clinker with a grinding fineness in the range of from 6,000 to 12,000 cm 2 /g, a sulfate carrier, and silica fume, and an aqueous B component.

10 . The cementitious multi-component mortar system according to claim 9 , wherein the aqueous B component comprises water and a plasticizer.

11 . A method of increasing load values of an inorganic chemical fastening system for anchoring elements in mineral substrates, the method comprising:
mixing finely ground Portland cement clinker with a grinding fineness in a range of from 6,000 to 12,000 cm 2 /g into a cementitious multi-component mortar system; wherein the cementitious multi-component mortar system further comprises:
a sulfate carrier selected from the group consisting of calcium sulfate, sodium sulfate, lithium sulfate, magnesium sulfate, and potassium sulfate, the sulfate carrier is a mixture of anhydrite and hemihydrate;
and silica fume; and
a mortar prepared from said cementitious multi-component mortar system has an internal strength of 4.5-20.7 N/mm 2 .

12 . The method according to claim 11 , wherein the cementitious multi-component mortar system is a two-component mortar system, wherein the two-component mortar system comprises:
a powdered A component, comprising the finely ground Portland cement clinker with a grinding fineness in the range of from 6,000 to 12,000 cm 2 /g, the sulfate carrier, and the silica fume, and an aqueous B component.

Assignees

• Hilti Ag

Inventors

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

Classifications

• C04B2111/00715

  for fixing bolts or the like · CPC title

• C04B2103/30

  Water reducers, plasticisers, air-entrainers, flow improvers · CPC title

• C04B40/065

  Two or more component mortars · CPC title

• C04B40/0042

  Powdery mixtures · CPC title

• C04B24/2647

  containing polyether side chains · CPC title