(A) Use water-reducing admixture or high-range water-reducing (HRWR) admixture (superplasticizer) in concrete as required for placement and workability. Unless otherwise permitted herein, chemical admixtures shall be dispensed at the batch plant. Use (HRWR) admixture in pumped concrete.
(B) Use air-entraining admixture in exterior concrete exposed to weather. Add air-entraining admixture at manufacturer’ s prescribed rate to result in concrete at point of placement having total air content specified above.
(C) Use admixtures for water reduction and set control (accelerators and retarders) in strict compliance with manufacturer’ s directions.
(Ord. 16-2020, passed 12-7-20)