WO2018185072 (A1)

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

(22) 03.04.2018

(43) 11.10.2018

(57) The present invention pertains to a use of calcium carbonate having an average particle size in the range of from 0.5 to 3 μm, preferably of from 1 to 3 μm, in an inorganic mortar system for a chemical fastening of anchors and post-installed reinforcing bars in mineral substrates, comprising 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 and at least one plasticizer and water, and component B comprising an initiator, at least one retarder, at least one mineral filler and water. Moreover, the present invention pertains to a use of calcium carbonate having an average particle size in the range of from 0.5 to 3 μm, preferably of from 1 to 3 μm, in an inorganic mortar to increase load values as well as to a method for a chemical fastening of anchors and post-installed reinforcing bars, preferably of metal anchors and post-installed reinforcing bars, in mineral substrates, such as structures made of brickwork, concrete, pervious concrete or natural stone.

(71) Hilti AG (LI)

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