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strengths equal to those specified.Maximum reduction in weight of cement shall not <br /> exceed 15 percent of specified amount. <br /> G. Admixtures: Admixtures shall conform to ASTM C494 or ASTM C260 and shall not <br /> contain chlorides or thiocyanates. <br /> 1. Water Reducing Admixtures: ASTM C494,Type A. Add to concrete in accordance <br /> with manufacturer's instructions. Eucon WR-75 by Euclid Chemical,Pozzolith 220N <br /> by Master Builders,Plastocrete 160 by Sika Chemical, Prokrete N by Protex <br /> Industries,or WRDA by Grace Construction Products. <br /> 2. Water Reducing,Retarding Admixture: ASTM C494,Type D. Pozzolith 100XR by <br /> Master Builders,Plastiment by Sika Chemical,Eucon Retarder-75 by Euclid <br /> Chemical, Protard by Protex Industries or Duratard 17 by Grace Construction <br /> Products. <br /> 3. High Range Water Reducing Admixture(Superplasticizer): ASTM C494,Type F or <br /> G. Sikament by Sika Chemical,Eucon 37 by Euclid Chemical,WRDA or Daracem <br /> 100 by Grace Construction Products. <br /> 4. Non-Corrosive,Non-Chloride Accelerator: ASTM C494,Type C or E,Accelguard <br /> 80 by Euclid Chemical,or Daraset by Grace Construction Products. <br /> 5. Air-Entraining Admixtures: ASTM C260. Where required air contents are <br /> specified,add in accordance with manufacturer's instructions. Protex AES by Protex <br /> Industries,Air-Mix by Euclid Chemical,Daravair by Grace Construction Products or <br /> Micro-Air by Master Builders. <br /> 6. Prohibited Admixtures: Calcium chloride,thiocyanates or admixtures effectively <br /> containing chloride ions(more than 0.05 percent)are not permitted. <br /> H. Bonding Compound: ASTM C1059,Everbond by L&M Construction Chemicals, <br /> Acrylset by Master Builders or Acryl 60 by Thom. Use to bond toppings to base slab. <br /> 2.2 NORMAL WEIGHT CONCRETE MIXES <br /> A. General: Manufacture and deliver concrete in accordance with ASTM C94 with <br /> exceptions specified herein. <br /> B. Minimum Compressive Strength: Concrete used for footings and all other concrete shall <br /> have minimum compressive strength of 4000 pounds per square inch at 28 days of age <br /> except where indicated otherwise on drawings. <br /> C. Air Entrainment: Exterior exposed concrete shall contain 6 percent entrained air with <br /> maximum tolerance of plus or minus 1.5 percent. <br /> ADDENDUM#1 <br /> 1607.001 - ORONO ICE ARENA (CP-2) Page 03300- 5 <br />