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

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.