3.8.5.2
Non-destructive tests may be used when permitted to evaluate concrete
where standard molded and cured cylinders have yielded results not meeting
the criteria.
3.8.5.3
Core Tests
When the average compressive strengths of the representative cores are
equal to at least 85 percent of the design strength (f'c) or the required
average test strength (fcr), whichever is higher, and if no single core is
less than 75 percent of t he specified strength (f'c) or the required
average field test strength (fcr), whichever is higher, strength of
concrete is satisfactory.
3.8.6
Inspection
ACI 311.4R. Inspect concrete placed under water with qualified
engineer/divers.
-- End of Section --
SECTION 03311
Page 46
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