Procedure to calculate materials required for concrete 1:2:4 ratio and a online calculator
Procedure to calculate materials required for concrete 1:2:4 ratio and a online calculator
Calculation of materials required is to be done by a site engineer in order to purchase the materials like cement, sand, course aggregates well before work starts. This is one of the basic question asked by interviewers .
Consider 1 m3 volume of concrete
Ratio of concrete = 1:2:4
Add 30% for allowance for shrinkage after adding water and voids in concrete
Total volume = 1+(1*30/100) =1.3 m3
Cement = 1.3/(1+2+4) = 0.186 m3 = ( cement = 1440 kg/m3) so 267 kg = 5.35 no of 50 kg bags
Sand =0 .186 * 2 =0.371 m3
Course aggregates = 0.186 * 4 =0.743 m3
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