AS 1012.14:2018 pdf free
AS 1012.14:2018 pdf free.Methods of testing concrete
Cores shall be liable for rejection if any of the following criteria apply:
(a) The average diameter at each measured cross-section is less than the greater of either 75 mm or three times the nominal size of coarse aggregate.
(b) The average diameter at any measured cross-section deviates by more than 2 mm from either of the other two averaged diameters.
(c) The length of the core (L) after any necessary trimming and/or grinding is less than the diameter (d).
(d) Any edge is broken away in such a manner that the radial or vertical break is more than 10 mm from the edge line and the corresponding circumferential break (or sum of circumferential breaks) exceeds 1 0% of the circumference of the core.
(e) Either end of the core is not at right angles to the axis and the departure from squareness exceeds 2° (approximately 5 mm in 150 mm).
(f) Aggregate or other bulges protrude from either end by more than 2 mm.
(g) Either end of the core is convex or concave by more than 2 mm.
(h) There is an apparent defect likely to affect the test result.
NOTE: The core may be retrimmed to conform with these criteria.
Testing shall be performed in accordance with the following:
(a) Mass per unit volume Testing of the prepared cores shall be performed in accordance with AS 1012.12.1 or AS 1012.12.2，making allowance for any reinforcement that may be present.
(b) Compressive strength Testing of the prepared cores shall be performed in accordance with AS 1012.9, except that rubber caps shall not be used. The max imum applied force, in kN, indicated by the testing machine shall be recorded.
For a group of three cored specimens secured from the same location, cured in similar conditions and tested at 28 days or more, the accuracy expressed as a percentage of the mean of the strengths obtained, is +7% at the 95% probability level, subject to a L/d of 2:1.As this ratio decreases, the repeatability of the test also increases in value.AS 1012.14 pdf free download.
