Construction Research & Technology Gmbh

Sika Technology Ag

Tatiana Mitkina

Maxim Pulkin

Alexander Kraus

Frank Dierschke

Klaus Lorenz

Torben Gädt

Luc Nicoleau

Joachim Dengler

Peter Schwesig

Bernhard Feichtenschlager

Mario Vierle

Uwe Gehrig

Sarunas Turcinskas

Madalina Andreea Stefan

Massimo Bandiera

Wolfgang Seidl

Bernhard Sachsenhauser

Michael Melchart

Klaus Hartl

Sabine Himmelein

Farra Ramzi

Davide Carnelli

Johanna Parks

Matthias Klein

Kai Steffen Weldert

Jasveer Ramroo Beni

Torben Gadt

A construction composition comprises a) a cementitious binder comprising one or more calcium silicate mineral phases and one or more calcium aluminate mineral phases; b) optionally, an extraneous aluminate source; c) a sulfate source; d) an ettringite formation controller comprising (i) glyoxylic acid, a glyoxylic acid salt and/or a glyoxylic acid derivative; and (ii) at least one of a borate source and a carbonate source; and e) a polyol in an amount of 0.2 to 2.5 wt.-%, relative to the amount of cementitious binder a). The composition contains 0.05 to 0.2 mol of total available aluminate, calculated as Al(OH), from the calcium aluminate mineral phases plus the optional extraneous aluminate source, per 100 g of cementitious binder a); and the molar ratio of total available aluminate to sulfate is 0.4 to 2.0. The construction composition exhibits high early strength and sufficient open time.

Construction composition

The present invention relates to the use of a cationic copolymer as a rheology modifier in a geopolymer foam formulation, a geopolymer foam formulation comprising a cationic copolymer, a process for preparing a geopolymer foam, a geopolymer foam comprising a cationic copolymer and composition for preparing a geopolymer foam formulation.

Rheology modifier for geopolymer foam formulations

Copolymers that comprise salicylic acid derivative structural units and structural units having free polyether side chains. The copolymers are suitable to plasticize inorganic binder systems, construction chemical compositions comprising the copolymers and the use of the copolymers as a plasticizer for inorganic binder systems. Binder systems with a reduced amount of Portland cement comprising at least one copolymer of the invention provide a better liquefaction and processability as compared to the binder systems without a copolymer of the invention.

Copolymers suitable for plasticizing inorganic binder systems

Proposed is a polycondensation product comprising as monomer components at least one aryl polyoxyalkylene ether, at least one vicinally disubstituted aromatic compound, at least one aldehyde and also optionally further aromatic compounds; processes for preparing same, and also use thereof as dispersant for aqueous suspensions of inorganic binders and as grinding assistant for inorganic binders.

Polycondensation product based on aromatic compounds, method for the preparation and use thereof

The present invention relates to cationic copolymers, a process for the production of these cationic copolymers and the use of these cationic copolymers as dispersants for geopolymer binder systems. These cationic copolymers where the cationic charge is due to the presence of certain cyclic and/or polycationic groups are stable towards Hoffmann elimination that would otherwise occur at very high pH values. Moreover, the dispersing effect of cationic polymers can be further enhanced through the addition of polyvalent anions.

Cationic copolymers

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Traunstein, Germany

Tatiana Mitkina