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1. A fire-resistant two-component mortar system for a fire-resistant chemical fastening of anchors and post-installed reinforcing bars, comprising: a curable aqueous-phase aluminous cement component A, and an initiator component B in aqueous-phase for initiating a curing process, wherein component A comprises aluminous cement, at least one plasticizer, water, and at least one blocking agent selected from the group consisting of phosphoric acid, metaphosphoric acid, phosphorous acid, and phosphonic acid, and wherein component B comprises an initiator, at least one retarder, at least one mineral filler, and water, the at least one first mineral filler is selected from the group consisting of limestone fillers, sand, corundum, dolomite, alkaline-resistant glass, crushed stone, gravel, pebble, and a mixture thereof; component A and component B are separate; and 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.
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