Rheology-active additives in OPC based formulations - From nano/micro-scale structures to macro scale properties -

Applicants Professor Dr. Jürgen Neubauer
Friedrich-Alexander-Universität Erlangen-Nürnberg
GeoZentrum Nordbayern
Lehrstuhl für Mineralogie
Professor Dr. Dietmar Stephan
Technische Universität Berlin
Institut für Bauingenieurwesen
Fachgebiet Baustoffe und Bauchemie

Subject Area Construction Material Sciences, Chemistry, Building Physics
Structural Engineering, Building Informatics and Construction Operation
Term since 2017
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Projekt number 386869775

Project Description

Two substantial goals are pursued in this proposal.Initially the highly time resolved (ca. 10 min) evolution of the relevant rheology determining parameters during the early cement hydration will be traced and evaluated. Here the evolution of the specific surface area of the clinker phases, the evolution of the morphology and the amount of the forming hydrate phases as well as the availability and amount of the residual unbound and rheology active water fraction play a significant role. These parameters and others will be traced and quantified by a combination of different physical, chemical and rheological analytic methods. Important to highlight that most of the proposed analytic methods provide overlapping information, allowing a cross validation in order to confirm the consistency of the measured results.In the second part the influence of different rheology active additives on the above mentioned parameters will be evaluated. Thereby important information on the effect of building additives and the fundamental working mechanisms of the superimposition of cement hydration and the development of rheological properties over time are expected. These information are compulsory for further in deep understanding of the rheology in fresh concretes. 
DFG Programme Priority Programmes


TU Dresden
Institute of Construction Materials
01062 Dresden, Deutschland