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5. When air temperature is between 85 and 90 degrees F, reduce mining and <br />delivery time to 75 minutes. When air temperature is higher than 90 <br />degrees, reduce mixing and delivery time to 60 minutes. <br />3.02 PLACING OF CONCRETE <br />A. Review: No concrete shall be placed until all reinforcing steel, pipes, sleeves, <br />inserts, etc. have been set in place and reviewed by the Owner's representative. <br />Contractor shall notify the Architect of scheduled pours 24 hours prior to <br />pouring. <br />B. Placing: Concrete shall be placed in properly cleaned and prepared forms in <br />accordance with the requirements of ACI -301. Concreting should be carried on at <br />such a rate that the concrete is at all times plastic. <br />C. Conveying: Concrete shall be handled from the mixer to the place of final deposit <br />as rapidly as practicable by methods which will prevent segregation or loss of <br />ingredients and in a manner which will assure that the required quality of the <br />concrete is maintained. All other requirements of ACI -301 shall be followed. <br />D. Depositing: Concrete shall be deposited continuously or in layers of such <br />thickness that. no concrete will he deposited on concrete which is hardened <br />sufficiently to cause the formation of seams or planes of weakness within the <br />section. <br />E. Consolidation: All concrete shall be consolidated by vibration, spading, rodding, <br />or forking so that the concrete is thoroughly worked around the reinforcement, <br />around embedded items, and into corner of forms eliminating all air or stone <br />pockets which may cause honeycombing, pitting, or planes of weakness. <br />F. All slabs on grade are to be Regular 3/4 rock concrete at 3000 psi ultimate strength <br />at 28 days. NO PUMP MIX (pea rock) WILL BE ACCEPTED for any slab on <br />prepared grade. This does not prohibit the pumping of the regular 3/4 rock mix. <br />3.03 JOINTS <br />A. Construction Joints: <br />Locate as shown on the drawings or near points of minimum shear and as <br />approved by Architect/Engineer for beam or slabs. Construction joints shall <br />be straight saw -cut by a walk behind motorized saw, tooled, mechanical or <br />actual cold joints as called out on the plans. <br />2. Locate joints in vertical members, walls at underside of floors or beams, <br />and at tops of footings. <br />03300-5 <br />