Basis of the tailored interaction in composites of high-modulus polymer fibers and cementitious matrices

Sponsor:
DFG, grant BE 2601/4-1

Funded project partners:
- Technische Universität Dresden, Institute of Construction Materials/ Institut für Baustoffe
- Leibniz-Institut für Polymerforschung Dresden e. V.

Contact persons:
PD Dr. habil. Alla Synytska
Dr. Astrid Drechsler
Dr. Ralf Frenzel

Duration:
05/2016-04/2018

Abstract:
Strain-hardening cement-based composites (SHCC) are cement-based high-performance materials reinforced with polymer fibers. Within the project, relations between the surface properties of high-performance polymer fibers and the performance of the fiber-reinforced cement composites were studied systematically. By chemical bonding of water-soluble aldehydes or adsorption of polyelectrolyte layers, the surface charge and wettability of PVA fibers were varied. Afterwards, their interaction with the cement matrix was investigated. Hydrophobizing the fibers by aldehydes has a strong impact on their adhesion in the matrix; the surface charge plays a minor role in the highly alkaline environment.

Publications:
Curosu, I. ; Liebscher, M. ; Alsous, G. ; Muja, E. ; Li, H. ; Drechsler, A. ; Frenzel, R. ; Synytska, A. ; Mechtcherine, V.
Tailoring the crack-bridging behavior of strain-hardening cement-based composites (SHCC) by chemical surface modification of poly(vinyl alcohol) (PVA) fibers Cement and Conrete
Composites 114 (2020) 103722

Drechsler, A. ; Frenzel, R. ; Caspari, A. ; Michel, St. ; Holzschuh, M. ; Synytska, A. ; Curosu, I. ; Liebscher, M. ; Mechtcherine, V.
Surface modification of poly(vinyl alcohol) fibers to control the fiber-matrix interaction in composites
Colloid and Polymer Science 297 (2019) 1079-1093

Drechsler, A. ; Frenzel, R. ; Caspari, A. ; Michel, St. ; Holzschuh, M. ; Synytska, A. ; Liebscher, M. ; Curosu, I. ; Mechtcherine, V.
Surface modification of polymeric fibers to control the interactions with cement-based matrices in fiber-reinforced composites Key
Engineering Materials 809 (2019) 225-230