(A) Mix and deliver concrete in accordance with ASTM C94 using the design mix.
(B) Provide concrete with the following characteristics:
(1) Twenty-eight-day compressive strength: 4,000 psi for all concrete unless otherwise shown or specified;
(2) Air content.
(a) For concrete exposed to weather: 5% plus or minus 1.5%.
(b) For concrete not exposed to weather: not to exceed 5%.
(3) Slump for conventionally placed concrete: not to exceed five inches plus or minus one inch;
(4) Slump for pumped concrete: not to exceed six inches at the point of discharge from the pipe or hose after pumping. High-range water-reducing admixture (superplasticizer) required;
(5) Temperature shall be in the range of 50° to 90°F.
(Ord. 16-2020, passed 12-7-20)