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Bonding and Interfacial Microstructure in Cementitious Matrices Reinforced by Woven Fabri

Published online by Cambridge University Press:  21 February 2011

A. Peled ,
D. Yankelevsky  and
A. Bentur
A. Peled
Affiliation:
National Building Research Institute, Faculty of Civil Engineering, Technion, Israel Institute of Technology, Haifa, Israel
D. Yankelevsky
Affiliation:
National Building Research Institute, Faculty of Civil Engineering, Technion, Israel Institute of Technology, Haifa, Israel
A. Bentur
Affiliation:
National Building Research Institute, Faculty of Civil Engineering, Technion, Israel Institute of Technology, Haifa, Israel
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Abstract

High performance cementitious composites can be produced by reinforcement with a high volume of aligned fibers. One practical method of production of such composites would be based on the use of woven fabrics, where the bonding may be different from that predicted from evaluation of continuos aligned fibers. The present paper presents the study of the pull-out behavior of a fabric from a cementitious matrix. The influence of various fabric parameters were evaluated by comparing the pull-out of straight yams (fibers), crimped yams untied from the fabric and the fabric itself The influence of initial tensioning of the yams, which is an essential step in the production process, was also evaluated. SEM observations were carried out to interpret the pull-out curves in terms of microstructural characteristics. The crimped nature of the yam was found to be an important factor in enhancing the bond of the fabric, as it generated anchoring effects. Tensioning of the yam was detrimental to bond as it straightened the yarn and caused Poisson effects which damaged the interface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 370: Symposia Va/Vb – Microstructure of Cement-Based Systems/Bonding and Interfaces in Cement... , 1994 , 549
Copyright
Copyright © Materials Research Society 1995

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References

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