Patent DE-102009061053-A1 (DE)
Title: Pressed dry mortar mold body comprises a mineral binder, a demolition means, a porous, relatively brittle, dry lightweight aggregate granule, a pressing aid, a mineral aggregate, and a further mineral
Inventor: BOENKENDORF ULF
IPC: C04B40/00
Filed: 2009-12-10
Abstract: The pressed dry mortar mold body comprises a mineral binder, a demolition means, a porous, relatively brittle, dry lightweight aggregate granule with grain compressive strength of 20-65 kN, a pressing aid, a mineral aggregate, and a further mineral in the pressing cut compressible aggregate, where the mortar mold body is produced under usage of a lightweight aggregate granule, which has a maximum grain size that is greater than the maximum grain size of the mineral during the press cut in compressible aggregate. The pressed dry mortar mold body comprises a mineral binder, a demolition means, a porous, relatively brittle, dry lightweight aggregate granule with grain compressive strength of 20-65 kN, a pressing aid, a mineral aggregate, and a further mineral in the pressing cut compressible aggregate, where the mortar mold body is produced under usage of a lightweight aggregate granule, which has a maximum grain size that is greater than the maximum grain size of the mineral during the press cut in compressible aggregate. The lightweight aggregate granule exists in the form of calcium silicate hydrate-granules and/or aerated concrete-granules and/or foam concrete and/or expanded perlite and/or expanded vermiculite and/or pumice and/or clay pebbles as the pressing aid. The mineral binder exists as cement and/or lime and/or gypsum and/or granulated blast furnace slag and/or pozzolan in a quantity of 15-35 wt.%. A further aggregate exists as rock sand and/or rock flour such as quartz sand and/or quartz powder and/or limestone and/or limestone sand in a quantity of 60-80 wt.%. An additive exists as setting regulator and/or flow agents and/or air-entraining agent, water retention agent and/or re-dispersion powder in a quantity of 0.05-1 wt.%. The pressing aid has a residual moisture content of 1 wt.% and exists in a quantity of 2-30 wt.%. The pressing aid has a grain compressive strength of 3-30 kN and a grain size of 2 mm. A further pressing aid is contained in the form of a sheet silicate such as talc and/or clay minerals such as bentonite (0.2-5 wt.%) and/or in the form a stearate such as calcium and/or magnesium stearate (0.2-3 wt.%). The mold body contains burnt lime and/or burned dolomite as the demolition means and a material (0.05-0.5 wt.%) forming with water gas as a further demolition means. The burnt lime has a particle distribution expressed as sieve residue or sieve material, which consists of greater than 0.2 mm less than 0.1 wt.% of residue and/or greater than 0.09 mm less than 5 wt.% residue as fine lime and 6.3 mm less than 5 wt.% of residue and/or 4 mm less than 20 wt.% of residue and/or 1 mm less than 20 wt.% of passage and/or 0.5 mm less than 15 wt.% of passage as a granular lime with high reactivity. A lime burned as burnt lime (0.5-5wt.%) with t 6 0value has a wet quenching curve of 1 minute. The further demolition means is aluminum powder. An independent claim is included for a method for producing pressed dry mortar mold body.