Use of fine calcium carbonate in an inorganic mortar system based on aluminous cement to increase load values

US10815157B2 · kind B2 · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Anna Sharmak · Augsburg, DE
• Armin Pfeil · Kaufering, DE
• Friedlinde Götz-Neunhöffer · Erlangen, DE
• Daniel Jansen · Schweinfurt, DE

Key dates

• Filing date: Apr 3, 2018
• Grant date: Oct 27, 2020
• Expiry date: Apr 3, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/00715
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Calcium carbonate which has an average particle size in the range of from 0.5 to 3 μm is used in an inorganic mortar system for a chemical fastening of anchors and post-installed reinforcing bars in mineral substrates. The system includes a curable aluminous cement component A and an initiator component B for initiating the curing process. The component A includes at least one blocking agent selected from phosphoric acid, metaphosphoric acid, phosphorous acid and phosphonic acids, at least one plasticizer, and water. The component B includes an initiator, at least one retarder, at least one mineral filler, and water. Moreover, the calcium carbonate increases load values. Further, a method is used for a chemical fastening of anchors and post-installed reinforcing bars in mineral substrates, such as structures made of brickwork, concrete, pervious concrete or natural stone.