Reliability of the pull-off test for in situ evaluation of adhesion strength

• Type: Article in International Scientific Journal
• Date: 2012

Authors

N. M. M. Ramos (Author) FEUP; M. L. Simões (Author) FEUP; J. M. P. Q. Delgado (Author) FEUP; V. P. de Freitas (Author) FEUP

Journal

Title: Construction and Building Materials

Vol. 31 No. 1

Pages: 86-93

ISSN: 0950-0618

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 22 Citations

ISI Web of Science

Scopus - 34 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Civil engineering

Other information

Authenticus ID: P-002-9WZ

DOI: 10.1016/j.conbuildmat.2011.12.097

Abstract (EN): The pull-off test is a very popular way of evaluating the adhesion strength of renderings or ceramic tiles. Several standards frame the application of this test and interpretation of its results. In our laboratory, the in situ pull-off test is frequently applied to support the diagnosis of causes for building anomalies. The statistical meaning of the results, however, is clearly different from the one found in laboratory tests and hence reliability issues arise. In this article, 55 case studies based on in situ tests are analysed. The sample was retrieved from 15 test reports conducted by LFC-FEUP. In each of these reports different situations are included in terms of wall components, expected hygrothermal loads and ageing history. This large number of tests supports a discussion on the applicability of the pull-off test regarding its reliability as a tool for two different subjects: decisions on repair strategies and building forensics. Typical variability found in field tests is described and analysed. The reliability of the test is analysed in detail with the help of one specific case where 40 individual pull-offs were conducted in the same building.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8