USE OF A CALCIUM SULFATE COMPRISING 2-K MORTAR SYSTEM BASED ON ALUMINOUS CEMENT IN ANCHORING APPLICATIONS TO INCREASE LOAD VALUES AND REDUCE SHRINKAGE

摘要

The present invention pertains to a use of a calcium sulfate comprising 2-K mortar system for a chemical fastening of anchoring means in mineral surfaces. Besides the calcium sulfate, the mortar system comprises a curable aluminous cement component A and an initiator component B for initiating the curing process, component A further comprising at least one blocking agent selected from the group consisting of phosphoric acid, metaphosphoric acid, phosphorous acid and phosphonic acids, at least one plasticizer and water, and component B comprising an initiator, at least one retarder, at least one mineral filler and water. Due to the presence of the calcium sulfate the hardened mortar exhibits increased load values and reduced shrinkage. The mortar system is used for chemical fastening of anchoring means, preferably of metal elements, in mineral surfaces, such as structures made of brickwork, concrete, pervious concrete or natural stone.