Transfer Project T9

Modelling and Development of Load-Adapted Textile Reinforcements for Concrete

Director

Prof. Dr.-Ing. habil. Dipl.-Wirt. Ing. Chokri Cherif
Institute of Textile Machinery and High Performance Material Technology

Staff

Dr.-Ing. Jan Hausding
Dipl.-Ing. Ulrike Berger
Dipl.-Ing. (FH) Thomas Engler

Projektpartner

SGL Technologies GmbH
Karl Mayer Malimo Textilmaschinenfabrik GmbH

Objectives

The project T9 centers on load-adapted textile reinforcements for concrete made of carbon fiber heavy tows (CFHT). CFHT reduces energy and labor input and therefore the costs for practical implementation. To reap the maximum benefits provided by non-crimp laid scrims, it is necessary to improve the fabric manufacturing process and streamline the online coating technology. The primary aim of the project is to establish the necessary scientific and technical principles for application. The project concentrates on the influence of machine and process parameters on the finished laid scrims and examines textile reinforced concrete composites.

For a high quality CFHT product, improvements on the yarn guide and yarn transport on the warp-knitting machine are necessary. In addition, it is important that the yarn quality, yarn geometry and the position of the yarn remain intact until the warp-knitting position is reached.

In addition to various other approaches, high-tensile carbon yarns to be used as binding threads are planned to improve the bond between the textile grid and concrete. The yarn creates ”ribs“ on the surface of the fabric, which serves as additional mechanical ”anchors.“ The advances in coatings and application technology strengthen the internal bonds and interface between the fabric and matrices.

A further development to be explored as a means to improve the bond, is enhanced stitch-bonding process with the needle shift. This technique enables the production of symmetrical textiles in just one process step. The grid structures produced with the enhanced stitch-bonding technique maximize the effective bonding surface area.

Based on the acquired knowledge, standard reinforcement non-crimp textiles will be designed for practical construction applications, technologically developed and prepared for further examination and testing.

Publications

2011

Berger, U.; Hausding, J.; Quinones, V.; Plaggenborg, B.; Zeidler, G.; Cherif, Ch.; Weiland, S.: Production concepts for textile reinforcements made of 50K carbon filament yarn for civil engineering applications. In: SAMPE Europe SEICO 11. Paris, 2011

2010

Berger, U; Cherif, Ch.: Textile Hochleistungswerkstoffe zur Betonbewehrung. In: 2. Anwendertagung Textilbeton, Dresden, 1.10.2010, S.18, CD-Rom.
Berger, U.; Hausding, J.; Jesse, F.; Plaggenborg, B.; Cherif, Ch.: High performance textile reinforcements based on carbon fiber heavy tows. In: ACI 2010 Fall Convention. Pittsburgh, Pennsylvania, USA, October 24-28, 2010