Experimental techniques for measuring fibre/matrix interfacial bond shear strength

Experimental techniques for directly obtaining some measure of the shear strength of the interfacial bond between fibrous reinforcements and cemetitious matrices are reviewed. These techniques— essentially single- or multiple-fibre pull-out out tests — are classified according to specimen type and configuration and are then evaluated and compared using a set of criteria adapted by the author for this purpose. None of the techniques are found to satisfy completely all of the criteria, but several probably could be modified to do so. The objective of this state-of-the-art review is to provide a basis for discussion of the possible future standardization of a test technique for determining fibre/matrix interfacial bond shear strength in cementitious matrix composite specimens.