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Unformatted text preview: 1 CGN 3501 TEST NO. 2 NAME _______________________ 10/20/2008 THIS IS A CLOSED-BOOK TEST. NO CALCULATOR WITH TEXT MEMORY IS ALLOWED. PART I – MIX DESIGN PROBLEMS A concrete mix is specified to have a water-cement ratio of 0.42 based on strength and durability requirements. The required slump for the fresh concrete is 1-2 inches. The concrete is to be non-air-entrained . The properties of the aggregates to be used are given below. Proportion the ingredients for one cubic yard of concrete using the Absolute Volume Method. Write a mix summary and compute the unit weight of the designed concrete. Use the tables on the next page for this problem. (40 pts.) (Please write on the back of the test paper if you need more space.) Properties of aggregates : Coarse Agg. Fine Agg. Dry Bulk Specific Gravity 2.37 2.60 Absorption 4.0% 0.3% Natural Moisture 3.5% 1.2% Nominal Maximum size 3/4 inch - Fineness Modulus - 2.4 Dry-Rodded Unit Weight 98 pcf - 2 PART II – QUESTIONS...
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- Fall '10
- pts, concrete mix, fresh concrete, fiber saturation point, hardened concrete