Example 3 Raw material calculation for a given concrete mix ratioA concrete mix has a proportion of 1:0.4:1.8:2.5 (P:W:S:G). In the powder content, 90% percentis Portland cement and 10% is solid silica fume (SF). The concrete also uses 0.25% retarder and1.5% superplasticizer. The absorption for sand is 1.2% and for coarse aggregate is 0.9%. The MC(OD) is 2.5% for sand and 0.4% for coarse aggregate. The solid content is 35% in retarder and 40%in superplasticizer. The SF used is a slurry with 50% of water. To cast 5 beams (100 × 100 ×500 mm) and 18 cylinders (100 × 200 mm), how much of each individual ingredient should beused (consider 5% extra amount)?Assuming the unit weight of concrete is 2400 kg/m3

A concrete mix has a proportion of 1:0.4:1.8:2.5 (P:W:S:G). In the powder content, 90% percent is Portland cement and 10% is solid silica fume (SF). The concrete also uses 0.25% retarder and 1.5% superplasticizer. The absorption for sand is 1.2% and for coarse aggregate is 0.9%. The M (OD) is 2.5% for sand and 0.4% for coarse aggregate. The solid content is 35% in retarder and 40% in superplasticizer. The SF used is a slurry with 50% of water. To cast 5 beams (100 × 100 × 500 mm) and 18 cylinders (100 × 200 mm), how much of each individual ingredient should be

A concrete mix has a proportion of 1:0.4:1.8:2.5 (P:W:S:G). In the powder content, 90% percent is Portland cement and 10% is solid silica fume (SF). The concrete also uses 0.25% retarder and 1.5% superplasticizer. The absorption for sand is 1.2% and for coarse aggregate is 0.9%. The M (OD) is 2.5% for sand and 0.4% for coarse aggregate. The solid content is 35% in retarder and 40% in superplasticizer. The SF used is a slurry with 50% of water. To cast 5 beams (100 × 100 × 500 mm) and 18 cylinders (100 × 200 mm), how much of each individual ingredient should be

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concrete was mixed with the following ingredients: 20.7 kg of cement, 39.2 kg of sand,60.9 kg of gravel, and 14.6 kg of water. The sand has a moisture content of 3.3% andan absorption of 4.7%. The gravel has a moisture content of 3.6% and an absorptionof 4.5%. Since water absorbed in the aggregate does not react with the cement or improve the workability of the plastic concrete, what is the water–cement ratio of this mix according to the American Concrete Institute’s weight mix design method? If a water–cement ratio of 0.5 is required using the same materials and ingredients but different amount of mixing water, what is the weight of the mixing water to use?
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