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In: Civil Engineering

A concrete mix was designed for thin core walls in a tall building. A 28-day strength...

A concrete mix was designed for thin core walls in a tall building. A 28-day strength of 32 MPa is required. The exposure classification for durability purposes is for B2 and C. One hundred laboratory test results on the controlling mix show a standard deviation of 5.3 MPa (k=1.65). The density of uncrushed coarse aggregate is 2850 kg/m3 and its dry rodded density is 1600 kg/m3 and the maximum size to be used is 10 mm. The density of fine aggregate is 2750 kg/m3 and its fineness modulus is 3.0. The high early strength cement used has a density of 3150 kg/m3.

Find the weight (in kg) of cement, water, fine and coarse aggregate for this mix, required to make a 2.4 m high x 1.2 m wide x 120 mm thick concrete wall using the ACI Method.                                                                                            

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Expert Solution

Complete mix design is shown below as per ACI code.

Ally Wells answered 2 years ago
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