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I I I I I I I I I I I I I I I I I I I --l TABLE 1 BRIDGE SUPERSTRUCTURES Slightly Aggressive Moderately Extremely Aggressive Component Aggressive Environment Environment Environment and Prestressed Fly Ash and/or Slag, or Slag Elements Type II, Type IP, Type IS, or Type IP (MS) Type I with Fly Ash Cast In Place Type I and/or Slag, Type II, Type II with Fly Ash Type IP, Type IS, or or Slag Type IP (MS) BRIDGE SUBSTRUCTURE, DRAINAGE STRUCTURES AND OTHER STRUCTURES Slightly Aggressive Moderately Extremely Aggressive Component Aggressive Environment Environment Environment Type I with Fly Ash All Elements Type I or Type III and/or Slag, Type II, Type 'I with Fly Ash Type IP, Type IP (MSJ, or Slag or Type IS 346-2.3 Pozzolans and Slag: Use as desired, on an equal weight replacement basis, fly ash, silica fume, meta kaolin, other pozzolans, and slag materials as a cement replacement in all classes of concrete, with the following limitations: (1) Mass Concrete: a. Fly Ash-ensure that the quantity of cement replaced with fly ash is 18% to 50% by weight, except where the expected core temperature is to rise above 1650 F. When the core temperature is expected to rise above 1650 F, the percentage of fly ash is required to be 35% to 50% by weight. b. Slag-ensure that the quantity of cement replaced with slag is 50% to 70% by weight. Ensure that slag is 50% to 55% of total cementitious content by weight of total cementitious materials when used in combination with silica fume and/or metakaolin. c. For Slightly and Moderately Aggressive environments ensure that there is at least 20% fly ash by weight and 40% Portland cement by weight for mixes containing Portland cement, fly ash and slag. (2) Drilled Shaft: a. Fly Ash-ensure that the quantity of cement replaced with fly ash is 33% to 37% by weight. b. Slag-ensure that the quantity of cement replaced with slag is 58% to 62% by weight. (3) For all other concrete uses not covered in (1) and (2) above, a. Fly Ash-ensure that the quantity of cement replaced with fly ash is 18 % to 22 % by weight. b. Slag-ensure that the quantity of cement replaced with slag is 25% to 70% for Slightly and Moderately Aggressive environments, and 50% to 70% by weight when used in Extremely Aggressive environments. Ensure that slag is 50% to 55% of total March 2007 01000-89 03-4122.D