Pull-out tests on injected anchors in tuff masonry elements

In this paper the results of pull-out tests on several types of injected anchors embedded in masonry elements made of yellow tuff are described and compared. Several bonded lengths and configuration of the masonry elements were considered in the tests. In particular, pull-out tests of anchors installed in single tuff stones were carried out in order to investigate the effect of masonry block dimensions on the activation of the splitting failure. Conversely, pull-out tests of anchors installed in masonry walls made of similar tuff stones were carried out in order to simulate real applications. Finally, the experimental results were compared with literature formulations in case of splitting failure, bond interface failure and masonry cone shaped failure