A fire-resistant two-component mortar system, which includes a component A and a component B, which is in an aqueous-phase for initiating a curing process. Component A includes water, aluminous cement, a mineral filler, a plasticizer, and a blocking agent selected from phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphonic acid. Component B includes an initiator, a retarder, a mineral filler, and water,

A long-term stabilized aqueous initiator composition, which includes components for curing of a two-component mortar system composition. The long-term stabilized aqueous initiator composition includes an activator component that has an alkali and/or alkaline earth metal salt, an accelerator component that has a water-soluble alkali and/or alkaline earth metal salt, a retarder selected from citric acid, tartaric acid, lactic acid, salicylic, gluconic acid, and a mixture of these components, a mineral filler selected from a limestone filler, corundum, dolomite, alkaline-resistant glass, crushed stone, gravel, pebble, and a mixture of these components, a thickening agent, and water.

A two-component mortar system, which includes a component A; and a component B, which is in aqueous-phase for initiating a curing process. 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 phosphoric acid. Component B includes an initiator, at least one retarder, at least one mineral filler, and water.

Use of a stable indole-nitroxide radical as a stabilizer and/or inhibitor for resin mixtures and reactive resin mortars is described on the basis of radically curable compounds. Resin mixtures and reactive resin mortars may be made stable in storage very effectively using the indole nitroxide radical and the pot life of mortar compositions can be adjusted in a targeted manner.

A multi-component inorganic anchoring system, for chemical fastening of anchors and post-installed reinforcing bars in mineral substrates, includes a curable powdery aluminous cement component A and an initiator component B in an aqueous phase for initiating a curing process. The powdery aluminous cement component A includes an aluminous cement component based on powdery calcium aluminate cement and component B includes an accelerator constituent and water. Furthermore, at least part of the calcium aluminate cement of component A has an average particle size in the range of from 0.5 to 15 ?m. Methods of using the calcium aluminate cement in a multi-component inorganic anchoring system to increase load values and methods for chemical fastening of anchors in mineral substrates can be performed.

A reactive resin contains at least one accelerator with high reactivity and at least one accelerator with low reactivity. A combination of at least one accelerator with high reactivity and at least one accelerator with low reactivity can be used in a reactive resin system. An accelerator composition can be used for a reactive resin system containing at least one accelerator with high reactivity and at least one accelerator with low reactivity.

An inorganic mortar system includes a curable aluminous cement component A and an initiator component B for initiating the curing process, as well as a calcium carbonate with a crystalline calcite content determined by XRD of greater than 80% and a specific surface area of greater than 15 m.sup.2/g in component A and/or component B. Component A further 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. Moreover, the calcium carbonate accelerates calcium aluminate cement hydration. A method for the chemical fastening of anchors and post-installed reinforcing bars in mineral substrates is developed.

An inorganic mortar system for a chemical fastening of an anchor in a mineral surface includes calcium sulfate, a component A, and a component B for initiating a daring process. Component A includes water, aluminous cement, at least one plasticizer, and at least one blocking agent selected from phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphonic acid. Component B includes an initiator, at least one retarder, at least one mineral filler, and water. Component A is also a curable composition.

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.sup.2/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.

Cementitious binder compositions for cementitious products including a hydraulic cement-based reactive powder blend, an inorganic flow control agent, and a metal-based dimensional movement stabilizing agent including at least one member of the group of lithium salt and lithium base, and methods for making the cementitious binder compositions.