Two-component mortar system based on aluminous cement and use thereof

Patent metadata

Field	Value
Publication number	US-11214519-B2
Application number	US-201615764897-A
Country	US
Kind code	B2
Filing date	Oct 19, 2016
Priority date	Oct 20, 2015
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A two-component mortar system, which includes a component A; and a component B, which is in aqueous-phase for initiating a curing process. Component A comprises water, aluminous cement, at least one plasticizer, and at least one blocking agent selected from the group consisting of phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphoric acid. Component B includes an initiator, at least one retarder, at least one mineral filler, and water.

First claim

The invention claimed is:

1. A two-component mortar system, comprising:
a component A; and
a component B, which is in aqueous-phase for initiating a curing process,
wherein component A comprises water, aluminous cement, at least one plasticizer, and at least one blocking agent selected from the group consisting of phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphonic acid and
wherein component B comprises an initiator, at least one retarder, at least one mineral filler, and water, and wherein
i) the initiator comprises a mixture of at least two members selected from the group consisting of an alkali metal salt, an alkaline earth metal salt, and a combination thereof,
ii) the at least one retarder is selected from the group consisting of citric acid, tartaric acid, lactic acid, salicylic acid, gluconic acid, and a mixture thereof,
iii) the at least one mineral filler is selected from the group consisting of a limestone filler, sand, corundum, dolomite, alkaline-resistant glass, crushed stone, gravel, pebble, and a mixture thereof,
iv) component A is a curable composition, and

component A and component B are separate,
wherein
the two-component mortar system has an initial set time of at least 10 min.

2. The two-component mortar system according to claim 1 , wherein
the initiator comprises a mixture of at least two lithium metal salts.

3. The two-component mortar system according to claim 1 , wherein
at least one retarder is citric acid, tartaric acid, or a mixture thereof.

4. The two-component mortar system according to claim 1 , wherein
the at least one mineral filler has an average particle size of not more than 500 μm.

5. The two-component mortar system according to claim 1 , wherein
the at least one mineral filler is a limestone filler or a mixture of at least two limestone fillers.

6. The two-component mortar system according to claim 1 , wherein
the water to aluminous cement ratio (W/CAC) or water to calcium sulfoaluminate cement (W/CAS), in the product obtained by mixing components A and B, is lower than 1.5.

7. The two-component mortar system according to claim 1 , wherein
the shelf life of component A and component B is at least six months.

8. The two-component mortar system according to claim 1 , wherein
component A and component B are in form of a slurry or paste.

9. The two-component mortar system according to claim 1 , wherein
the pH-value of component B is above 10.

10. A two-component mortar system, comprising:
a component A; and
a component B, which is in aqueous-phase for initiating a curing process,
wherein component A comprises water, aluminous cement, at least one plasticizer, and at least one blocking agent selected from the group consisting of phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphonic acid and
wherein component B comprises an initiator, at least one retarder, at least one mineral filler, and water, and wherein
i) the initiator comprises a mixture of at least two members selected from the group consisting of an alkali metal salt, an alkaline earth metal salt, and a combination thereof,
ii) the at least one retarder is selected from the group consisting of citric acid, tartaric acid, lactic acid, salicylic acid, gluconic acid, and a mixture thereof,
iii) the at least one mineral filler is selected from the group consisting of a limestone filler, sand, corundum, dolomite, alkaline-resistant glass, crushed stone, gravel, pebble, and a mixture thereof,
iv) component A is a curable composition, and

component A and component B are separate,
wherein
component B comprises
0.1 wt.-% to 4 wt.-% of lithium hydroxide,
0.1 wt.-% to 5 wt.-% of lithium sulfate or lithium sulfate monohydrate,
0.05 wt.-% to 5 wt.-% of citric acid,
0.05 wt.-% to 4 wt.-% of tartaric acid,
35 wt.-% to 45 wt.-% of a first mineral filler,
15 wt.-% to 25 wt.-% of a second mineral filler,
10 wt.-% to 20 wt.-% of a third mineral filler,
0.01 wt.-% to 0.5 wt.-% of a thickening agent, and
15 wt.-% to 25 wt.-% of water based on a total weight of component B.

11. The two-component mortar system according to claim 10 , wherein
the first mineral filler, the second mineral filler, and the third mineral filler are three different calcium carbonate fines.

12. A method of chemically fastening an anchor in a mineral surface, the method comprising:
setting the anchor in the mineral surface in the presence of the two-component mortar system according to claim 1 ; and
curing the two-component mortar system.

13. The method according to claim 12 , wherein
the anchor is at least one member selected from the group consisting of an anchor rod, a threaded anchor rod, a bolt, and a steel reinforcement bar.

14. The method according to claim 12 , wherein
the mineral surface is at least one member selected from the group consisting of brickwork, concrete, pervious concrete, and natural stone.

Assignees

• Hilti Ag

Inventors

• Falger Christian
• Pfeil Armin

Classifications

• C04B14/28 Primary

  of calcium · CPC title

• C04B28/06

  Aluminous cements (monolithic refractories or refractory mortars C04B35/66) · CPC title

• C04B22/16

  containing phosphorus in the anion, e.g. phosphates · CPC title

• Y02W30/91

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

• C04B24/06

  containing hydroxy groups · CPC title