Construction Research & Technology Gmbh

Heidelbergcement Ag

Dirk Schmitt

Gerhard Albrecht

Klaus Lorenz

Mohsen Ben Haha

Christoph Hesse

Luc Nicoleau

Mario Vierle

Michael Kutschera

Hubert Leitner

Sabrina Montero Pancera

Thomas Wohlhaupter

Reinhard Dorfner

Siegfried Zuern

Daniel Fridrich

Marc Rudolf Jung

Simon Nord

Torsten Freund

Maciej Zajac

Frank Bullerjahn

Anca Itul

Eva Jetzlsperger

Hans-Peter Kaub

Tina Schröder-Grimonpont

Barbara Batog

Gerd Bolte

Nicolas Spencer

Linda Irbe

Michael Braeu

Siegfried Zürn

Michael Tebbe

Michael Bräu

Michael BRÄU

Martin Walter

Eva Scholz

Macie Zajac

Ingrid Mikanovic

The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound and by reaction of a calcium compound with a silicon dioxide containing component under alkaline conditions, in both cases the reaction being carried out in the presence of a polycondensate containing at least one structural unit consisting of an aromatic or heteroaromatic moiety bearing a polyether side chain and at least one structural unit consisting of an aromatic or heteroaromatic moiety bearing at least one phosphoric acid ester group and/or its salt. The invention concerns a composition of calcium silicate hydrate and the polycondensate, its use as hardening accelerator and for the reduction of the permeability of hardened compositions.

Hardening accelerator composition containing phosphated polycondensates

The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound and a process for the preparation of a hardening accelerator composition by reaction of a calcium compound with a silicon dioxide containing component under alkaline conditions, in both cases the reaction of the water-soluble calcium compound with the water-soluble silicate compound being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticizer for hydraulic binders. The invention concerns also a composition of calcium silicate hydrate and comb polymer, its use as hardening accelerator and for the reduction of the permeability of hardened compositions.

Plasticizer-containing hardening accelerator composition

Identification and quantification of mass-produced goods in articles, a dye-containing polymer dispersion having been added to the mass-produced goods. The polymer dispersions contain particles which are coded by a mixture of dyes, and the polymer dispersion particles are quantitatively determined.

Method for qualitatively and quantitatively identifying bulk goods

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Leimen St. Ilgen, Germany

Dirk Schmitt