A method for controlling the volume expansion of a hydraulically setting composition including steel making slag, the method including a step of adding a silica source to the composition. Furthermore, hydraulically setting compositions obtained by such methods and their uses.

A multi-component resin system can be used for producing a mortar composition based on isocyanate amine adducts for the chemical fastening of construction elements. A mortar composition based on isocyanate amine adducts can be produced from the multi-component resin system. A method can be used for the chemical fastening of construction elements in mineral substrates with the mortar composition based on the isocyanate amine adducts.

The invention relates to radiation-treated reinforcement fibers, reinforced asphalt and portland cement concrete, and grout, methods for producing the same and application for their use. The radiation treatment includes exposing reinforcement fibers to electromagnetic energy, e.g., gamma rays, and/or electron-beam (E-beam) radiation. As a result of the treatment, the radiation-treated reinforcement fibers have a modified or deformed surface, e.g., an abraded and/or porous surface, as compared to reinforcement fibers without a radiation treatment.

A reactive resin composition is described, with a resin component, which contains a radical-polymerizable compound, and an initiator system, which contains an α-halocarboxylic acid and a catalyst system, which comprises a nitrogen-containing ligand and Cu(0) or an inorganic Cu(I) compound, as is the use of the same for construction purposes.

A cementitious multi-component mortar system contains granulated blast-furnace slag and an alkali-silicate-based initiator component, and can be used for the chemical fastening of anchoring elements in mineral substrates. The alkali-silicate-based initiator component is particularly suitable for the chemical fastening of galvanized anchoring elements.

The present invention relates to a two-component composition consisting of a component A intended to be mixed, in situ, with a component B in order to form an injectable or pumpable organo-mineral compound, in particular for injection-sealing dynamic anchor bolts, comprising at least one alkali metal silicate, at least one polyisocyanate derivative and at least one cement. The component A further contains at least one polyol having a molecular mass of between 50 and 200 g/mol, at least one polymerisation catalyst comprising at least one polar function and at least one gelling agent and the component B further comprises at least one suitable

A cementitious multi-component mortar system contains finely ground granulated blast-furnace slag with a grinding fineness in the range of from 5,000 to 15,000 cm.sup.2/g. The cementitious multi-component mortar system can be used as an inorganic chemical fastening system for anchoring elements in mineral substrates.

The invention relates to a cementitious multi-component mortar system comprising finely ground Portland cement clinker with a grinding fineness in the range of from 6000 to 12000 cm.sup.2 g, for use as an inorganic chemical fastening system for anchoring elements in mineral substrates.

A multi-component inorganic capsule anchoring system can be used for chemical fastening of anchors, bolts, screw anchors, screw bolts, and post-installed reinforcing bars in mineral substrates. The multi-component inorganic capsule anchoring system contains a curable powdery ground-granulated blast-furnace slag-based component A, and an initiator component B in aqueous-phase for initiating the curing process. The powdery ground-granulated blast-furnace slag-based component A contains further silica dust. The component B contains an alkali- or alkaline earth-hydroxide, alkali- or alkaline earth-carbonate, or alkali-or alkaline earth-sulfate component.

Hardener composition for an addition-polymerisation-curable synthetic fixing mortar system for embedding anchoring means in mortar in holes or crevices, wherein the hardener composition includes oligomeric siloxanes having on average per molecule at least one or preferably two or more organic radicals that carry one or more (secondary or primary) amino and/or thiol groups that react with isocyanate or epoxy groups in the addition reaction and having on average per molecule at least one or more hydrolysable groups, and, in addition, can include one or more further customary additives, to synthetic fixing mortar systems including such a hardener composition, to the use of such synthetic fixing mortar systems for embedding anchoring means in mortar in holes or crevices and to methods of producing and using the synthetic fixing mortar systems and the hardener composition.