Control of Composite Properties and Durability of Fiber-Reinforced Concrete Based on Fibers from Recyclable Polymers and Sustainable Matrices

Sponsor:
German Research Foundation (DFG); SY 125/17-1

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

Duration:
04/2021 – 03/2024

Abstract:
By reinforcing cementitious materials by polymer short fibers, strain-hardening cement composites can be created. In a previous project it was shown that surface modification of the fibers allows to control the properties of the composite. Goal of the project at hand is a bio-inspired surface modification of fibers made of recyclable polymers (P.E, PP, PET) and their application on composites with sustainable cementitious matrices. By creating a broad spectrum of different fiber surface properties (unpolyr, acidic, alkaline) and the variation of mixing parameters the fiber-matrix interaction can be specifically adjusted. This serves as basis for an empirical model of composite formation. Furthermore we aim for an improvement of the chemical stability of the fibers in the alkaline matrix and of the durability of the composites.

Publications:
Rezaie, A. B. ; Liebscher, M. ; Ranjbarian, M. ; Simon, F. ; Zimmerer, C. ; Drechsler, A. ; Frenzel, R. ; Synytska, A. ; Mechtcherine, V.
Enhancing the interfacial bonding between PE fibers and cementitious matrices through polydopamine surface modification
Composites Part B 217 (2021) 108817