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Advances in Materials Science and Engineering
Volume 2014, Article ID 984341, 8 pages
http://dx.doi.org/10.1155/2014/984341
Research Article

A New Pull-Out Technique for In-Place Estimation of Concrete Compressive Strength

1BOVIAR SRL, via Rho 56, 20020 Lainate, Italy
2Department of Civil, Chemical and Environmental Engineering, University of Genoa, Via Montallegro 1, 16145 Genova, Italy

Received 27 May 2013; Revised 6 December 2013; Accepted 19 December 2013; Published 6 February 2014

Academic Editor: Jiangbo Sha

Copyright © 2014 F. Latte Bovio et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A new type of postinstalled wedge anchor (B15G) is presented. A refined geometry of the anchor bolt and a careful choice of all the technical details allow the insert to work also in tensile stress states and to avoid much of the practical uncertainties that affect the commonly used procedures. The calibration of the procedure has been performed on 3 classes of concrete and for 5 stress distributions (medium and low compression, vanishing stress states, inhomogeneous compressive stresses, and inhomogeneous tensile stresses). It has been found that the correlation curves, pull-out force versus compressive strength, are not linear and depend on the stress state; besides, the statistical scattering of the calibration tests never exceeds 7-8% of the average values.