Author(s)

Birger Gigla

Abstract

A research project within the Sonderforschungsbereich 315 at the University of Karlsruhe is investigating the bond strength of supplementary injection anchors as a repair method in historic masonry. Such anchors are necessary for carrying tensile forces, or for new connections. They basically consist of a tensile element - usually steel - inserted into the slightly larger borehole with the annulus grouted with cement. The solid plug of injection material transfers the tensile forces to the masonry. Specimens under investigation are monolithic blocks and block- work of different stone variety and clay brick walls. Unlike reinforcing steel embedded in concrete, or reinforcing bars inserted in mortar bed joints during n

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