AS 1012.24:2015 Methods of testing concrete
6.6 Validity of the test result
For each test location, the load at failure is valid for all combinations of failure type, except where an abnormal failure occurs. An abnormal failure is where the adhesive layer fails prematurely; in this event the tensile bond strength for that location shall not be calculated.
NOTE: Abnormal failures may suggest the adhesive is unsuitable for use with the repair product or system under test and the manufacturer’s advice should be obtained.
The tensile bond strength for the repair or strengthening system shall then be determined by obtaining the mean of a minimum of three normal test results. If many abnormal failures occur, as defined in Clause 6.5, further sites shall be prepared and tested until the required minimum number of test results is obtained.
8 REPORT
The test report shall include the following information:
(a) The concrete structure, location, date and time of sampling and testing.
(b) Identification of the type, origin and designation of the repair product or system under test.
(c) The thickness of repair mortar.
(d) The age and type of the concrete substrate.
(e) The diameter, thickness and the material of the dolly used and the type of adhesive.
(f) A description of the pull-off test equipment, stating the make, type, load capacity and measurement range.
(g) The maximum failure load, in newtons, to the nearest newton.
(h) The mean diameter at failure, in millimetres, for each location.
(i) The tensile bond strength of the concrete repair or strengthening system, in megapascals, to the nearest 0.1 MPa.
(j) Type of failure, and if appropriate, percentage of each type.
(k) Photographs of the failure surfaces.
(l) Any anomalies or points of note recorded during testing.
(m) Reference to this test method, i.e. AS 1012.24.