2016-042 Resolution - Laserfiche WebLink

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previously evaluated or to be established by trial mixes), and with ACI 211.1. In addition, the maximum water -cement ratio (by weight) shall be 0.45 and the minimum cement content shall be 5-1/2 sacks per cubic yard. E. The concrete mix design and relevant quality control data from the concrete supplier shall be submitted to the Engineer for approval prior to beginning of any concrete work. F. Maximum aggregate size shall meet the requirements of ACI 318, Section 3.3. G. Unless otherwise noted or approved, all concrete shall be air -entrained. Air entrainment shall be accomplished through the use of an approved admixture. H. AIR CONTENT: The air content shall be 5 percent. SLUMP: Concrete slump shall be 2 inches minimum to 4 inches maximum. K. Mixing, transporting and placing concrete shall conform to applicable portions of ACI 211, ACI 212 and ACI 304 and as specified herein. 2.06 REINFORCEMENT A. DEFORMED BARS: Deformed reinforcing steel bars shall conform to ASTM A615, Grade 60 unless noted otherwise. Bars shall be tagged with mark number and size before shipment. B. STEEL WIRE: All cold -drawn steel wire for concrete reinforcement shall be in accordance with ASTM A 82. C. ACCESSORIES: Accessories shall conform to CRSI Manual of Standard Practice of Reinforced Concrete Construction. Include all devices necessary for proper placing, spacing, supporting, and fastening steel reinforcement in place. Accessories shall be galvanized after fabrication if underside of concrete will be exposed. 2.07 FORM WORK A. DESIGN: Formwork shall be designed for loads and lateral pressures outlined in Chapter 1, Guide to Formwork for Concrete (ACI 347) and wind loads as specified by the controlling local building code. Formwork design and construction are the responsibility of the Contractor. B. FORMS: Forms shall be constructed of wood, steel, or other approved material. Material shall be chosen based on strength and concrete finish requirements.