Use of a calcium carbonate of high purity and having a high specific surface area in an inorganic mortar system based on aluminous cement to increase load values

Abstract

A method is developed for increasing the load value of an inorganic mortar system that incorporates a calcium carbonate into the inorganic mortar system. The inorganic mortar system includes a curable aluminous cement component A and an initiator component B. The calcium carbonate has a crystalline calcite content determined by XRD of greater than 80% and a specific surface area of greater than 15 m/g. Component A includes at least one blocking agent selected from the group consisting of boric acid, phosphoric acid, metaphosphoric acid, phosphorous acid and phosphonic acids, at least one accelerator, and water, and component B includes an activator, at least one retarder, at least one mineral filler and water. A method is developed for the fastening of anchors and post-installed reinforcing bars in mineral substrates in the inorganic mortar system.