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4D <br />4P <br />SECTION 3D - CAST -IN-PLACE CONCRETE <br />PART i -MATERIAL REQUIREMENTS: <br />l . Cast -In -Place Concrete shall tneet the following requirements. <br />A. PORTLAND CEMENT. American Standard Brand per ASTM C-159, <br />Type 1. <br />B. FINE AGGREGATE: Shall he sharp, clean passing a ##S sieve meeting <br />ASTM C-33. <br />C. COARSE AGGREGATE: ASTM C-33 gravel or crushed stone. Size <br />graded from l" down. Size for column and beam pours shall be 112" and <br />down, <br />D. WATER: Shall be potable quality. <br />E. STRENGTH: 3000 PSI at 213 days for columns and beams: 2500 PSI for <br />foundations, slabs, and walks unless shown otherwise on the Drawings. <br />PART 2 - FINISHES <br />1, Force coarse aggregate from surface, screed level and Moat, machine trowell <br />71 smooth finish. Add broom texture and edge finish. <br />2. PLACE concrete as near to final position as possible to avoid segregation from <br />excessive handling. <br />3. MECHANICAL. vibrator shall be employed to work concrete around reinforcing <br />steel, embedments and corners. <br />4. PARTIALLY hardened or retempered concrete shall not be used in any part of the <br />project. Water shall not be added to_the design nuix without written approval of <br />the Inspecting Engineer. Concrete so altered shall he removed and necessary <br />repairs made to replace same at no additional expense to the Owner. <br />5. l3nncycombing or pl an ; of weakness apparent in the expozscd 4tmctviv %York shad <br />be patched or removed and replaced at the discretion of the owner. Such repai s <br />shall be made at no additional cost to the Owner. <br />b. Continuous pipe screeds shall be employed by Contractor to ensure even and <br />uniform slopes as shown on the Drawings. <br />7. Exposed concrete shall he hand rubbed tea u1111i0rm appearance, all voids Ilaxuc 1 <br />