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.., . II . f' e (t) = Average Core Strength at time t (psi) ,.., t = time compressive strength was measured (days) . 346-11.6.3 Slag-Cement Concrete: Equivalent 28-day compressive strength = f'e (28), where: f'e (28) = 0.794x f'e (t)x )7.~6r06 f'e (28) = 0.730x f'e (t)x )6.~2r747 (Type I Cement) r-, . .., . (Type II Cement) ..., ..., . f'e (28) = 0.826 x f'e (t)x )2.~6r72 (Type III Cement) f'e (t) =Average Core Strength at time t (psi) . .., . t = time compressive strength was measured (days) 346-11.7 Calculating Pay Adjustments: The Engineer will determine payment reductions for low strength concrete, accepted by the Department and represented by either cylinder or core strength test results below the specified minimum strength, in accordance with the following: Reduction in Pay is equal to the reduction in percentage of concrete cylinder strength (specified minimum strength minus actual strength divided by specified minimum strength) . For the elements that payments are based on the per foot [meter] basis, the Engineer will adjust the price reduction from cubic yards [cubic meters] basis to per foot [meter] basis, determine the total linear feet [meter] of the elements that are effected by low strength concrete samples and apply the adjusted price reduction accordingly. .., . r-. . 1""1 . .., . ,..., 347 PORTLAND CEMENT CONCRETE - CLASS I (NONSTRUCTURAL). (REV 8-3-05) (FA 8-9-05) (1-06) . r'1 SECTION 347 (Pages 301-304) is deleted and the following substituted: . .., SECTION PORTLAND CEMENT CONCRETE - CLASS I (NONSTRUCTURAL) 347 . r"1 . 347-1 Description. The requirements of this Section are applicable to concrete designated as Class I (Nonstructural), hereinafter referred to as concrete. Use concrete composed of a mixture of portland cement, aggregates, and water, with or without chemical admixtures, slag, or pozzolanic materials. Deliver concrete to placement site in a freshly mixed, unhardened ,.., . ...... . .., 09/09 01000-108 03-4122.F -