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I <br />TABLE 1 <br />BRIDGE SUPERSTRUCTURES <br />Component <br />Slightly Aggressive <br />Moderately <br />Aggressive <br />Extremely Aggressive <br />Environment <br />Environment <br />Environment <br />and Prestressed <br />Fly Ash and /or Slag, <br />or Slag <br />Elements <br />Type ll, Type IP, Type <br />IS, or Type IP (MS) <br />Type I with Fly Ash <br />Cast In Place <br />Type I <br />and /or Slag, Type II, <br />Type II with Fly Ash <br />Type IP, Type IS, o <br />or Slag <br />Type IP (MS) <br />BRIDGE SUBSTRUCTURE, DRAINAGE STRUCTURES AND OTHER STRUCTURES <br />Component <br />Slightly Aggressive <br />Moderately <br />Aggressive <br />Extremely Aggressive <br />Environment <br />Environment <br />Environment <br />Type I with Fly Ash <br />All Elements <br />Type I or Type III <br />and /or Slag, Type II,Type <br />II with Fly Ash <br />Type IP, Type IP (MS),or <br />Slag <br />or Type IS <br />346 -2.3 Pozzolans and Slag: Use as desired, on an equal weight replacement basis, <br />fly ash, silica fume, metakaolin, other pozzolans, and slag materials as a cement <br />replacement in all classes of concrete, with the following limitations: <br />(1) Mass Concrete: <br />a. Fly Ash - ensure that the quantity of cement replaced with fly ash is <br />18% to 50% by weight, except where the expected core temperature is to rise above <br />165° F. When the core temperature is expected to rise above 165° F, the percentage of <br />fly ash is required to be 35% to 50% by weight. <br />b. Slag- ensure that the quantity of cement replaced with slag is 50% <br />to 70% by weight. Ensure that slag is 50% to 55% of total cementitious content by <br />weight of total cementitious materials when used in combination with silica fume and /or <br />metakaolin. <br />c. For Slightly and Moderately Aggressive environments ensure that <br />there is at least 20% fly ash by weight and 40% Portland cement by weight for mixes <br />containing Portland cement, fly ash and slag. <br />(2) Drilled Shaft: <br />a. Fly Ash - ensure that the quantity of cement replaced with fly ash is <br />33% to 37% by weight. <br />b. Slag- ensure that the quantity of cement replaced with slag is 58% <br />to 62% by weight. <br />!) (3) For all other concrete uses not covered in (1) and (2) above, <br />a. Fly Ash - ensure that the quantity of cement replaced with fly ash is <br />18% to 22% by weight. <br />b. Slag- ensure that the quantity of cement replaced with slag is 25% <br />to 70% for Slightly and Moderately Aggressive environments, and 50% to 70% by weight <br />when used in Extremely Aggressive environments. Ensure that slag is 50% to 55% of total <br />March 2007 01000 -89 03- 4122.D <br />