Influence of Polymers on the Nucleation of Calcium Silicate Hydrates

Andreas Picker (1) , Luc Nicoleau (2) , André Nonat (3) , Christophe Labbez (3) , Helmut Cölfen (1)

1 University of Konstanz
2 BASF CONSTRUCTION CHEMICALS GmBH
3 ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne

Calcium silicate hydrates (C-S-H), the main components of hydrated cement, are known for being responsible of its cohesion. In this respect, they act as "glue" for the other solid components of mortar or concrete and thus strongly influence the mechanical properties of the outcoming material. Given the scarce knowledge about the influence of polymers on the growth and nucleation of C-S-H, this work focuses on the investigation of ongoing processes in the pre- and postnucleation stage of C-S-H precipitation. With the help of titration in combination with ion selective electrodes, effects of additives on the formation of C-S-H can be monitored and quantified resulting in new insights into the C-S-H formation in the presence of additives. Thus, this work can be regarded as a step towards a facilitated design of tailor-made C-S-H, which might result in superior cementitious materials on the long term.

Domaines: Chimie-Physique [physics.chem-ph]

Andreas Picker, Luc Nicoleau, André Nonat, Christophe Labbez, Helmut Cölfen. Influence of Polymers on the Nucleation of Calcium Silicate Hydrates. 2021. ⟨hal-03836392⟩