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Select Proportions for Normal Weight Concrete Mix:
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*Referencing ACI 211.1-91 (Reapproved 2009), "Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete", this calculation is to be used for selecting proportions for an initial normal weight concrete mix. |
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Calculation: |
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Designer/Checker: |
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Input: |
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Maximum concrete slump (Slump - in or mm); minimum slump is 1 in (25 mm) |
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Nominal maximum size of course aggregate (Ad - in or mm) (enter decimal form
only - no fractions) |
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Enter the water weight for concrete (W - lb/cy or kg/m^3) |
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Amount of entrapped air (Air - %) |
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Concrete 28 day compressive strength (f'c - psi or MPa) |
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Water-cement or water-cementitious materials ratio (WC) |
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Pozzolanic Materials |
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Pozzolanic materials percentage (PM - %) |
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Specific gravity of pozzolanic materials (Sp); if unknown use 2.4 |
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Unit weight of course aggregate (Aw - lb/cf or kg/m^3); if unknown, use 95 to 120 lb/cf (1522 to 1922 kg/m^3) |
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For Absolute Volume Basis only, enter the specific gravity of course aggregate (CASp) |
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Unit volume of course aggregate per unit volume of concrete (CAV) |
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Fineness modulus of fine aggregate (FA) |
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For Absolute Volume Basis only, enter the specific gravity of fine aggregate (FASp) |
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First estimate of concrete weight (ECW - lb/cy or kg/m^3) |
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Adjustment For Moisture in Aggregate |
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Total moisture content of course aggregate (CAM - %) |
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Total moisture content of fine aggregate (FAM - %) |
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Degree of moisture absorption of course aggregate (CAMA - %) |
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Degree of moisture absorption of fine aggregate (FAMA - %) |
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Water Reducing Admixture |
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Amount of water reducing admixure (WR - %) |
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Water reducting admixture resulting percent reduction of water, as given by manufacturer, (RW - %) |
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Output: |
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Initial Concrete Mix Design Proportions: |
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Water = |
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Cement = |
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Course Aggregate = |
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Fine Aggregate = |
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Pozzolanic Materials = |
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Water Reducing Admixture = |
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