PCA-ch9 - Designing and Proportioning Normal Concrete...

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Designing and Proportioning Normal Concrete Mixtures – ACI 211
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ACI 211 A Properly Proportioned Concrete Mix Should Posses These Qualities. Acceptable Workability of Freshly Mixed Concrete Durability, Strength and Uniform Appearance of the Hardened Concrete Economy
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SLUMP Normally specified Choice based type of construction shown on Table 9-6
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Slump
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WATER CONTENT Approximation based on slump, maximum size of the coarse aggregate, and type of concrete (air-entrained, or non air- entrained)- see Table 9-5 Air contents for AE concrete are normally specified but can also be determined by exposure conditions based on Table 9-5
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WATER-TO-CEMENT RATIO Concrete strength is specified by the design engineer. Based on specified concrete strength and type of concrete (AE or non AE)– see Table 9-3. W/C ratio may be modified due to certain environmental conditions–see Tables 9-1 and 9-2. Concrete strength may also be modified due to special conditions-see Table 9-11
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Water/Cement Ratio
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Cementitious Content Cement Content = Recommended water
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This note was uploaded on 08/27/2011 for the course BCN 3223 taught by Professor Muszynski during the Spring '09 term at University of Florida.

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PCA-ch9 - Designing and Proportioning Normal Concrete...

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