How to calculate cement bags in 1 cubic metre | calculate the cement quantity in 1 cubic metre of concrete.

Concrete is blended mixture of Portland cement, sand, aggregate and water with some additive admixture. Cement is one of the most important adhesive and Binder ingredient of concrete that binds the sand and aggregate together to increase the compressive strength of concrete. In concrete sand act as filler material, it fill the voids present between the coarse aggregate.

During the preparation of concrete generally 1 part of cement is mixed with 2 parts of sand with 3 parts of aggregate or gravel with required amount of water. It means one bucket of cement mix with two buckets of sand and 3 buckets of aggregate, so nominal mix ratio for concrete is 1:2:3 (1cement : 2 sand : 3 aggregate).

In India, generally a sack or a bag of cement comes in 50 kg weight and their density is about 1440 kg/m3. When water is added in mix cement sand and aggregate, then voids present between sand and aggregates are evaporated then output of concrete mix is decrease about 34%, so total output of concrete mix after adding water is about 66%.

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**How to calculate cement bags in 1 cubic metre**

**To calculate the cement quantity or bags in 1 cubic metre of concrete you should follow the following steps:-**

● consider nominal mix is 1:2:3

● total proportion = 1+2+3 = 6

● parts of cement = 1/6

● output of mix after adding water = 66%

● to achieve 1 cubic metre output we need 1/0.66 = 1.52 m3 concrete, consider 2 percent wastage of cement, then add wastage, 1.52 + 0.02 = 1.54m3.

● cement quantity in cubic meter = 1/6 × 1.54 = 0.256 m3

● cement quantity in cubic meter = 0.256 × 35.3147 = 9 cubic feet

● cement quantity in kg = 1/6 × 1.54m3 × 1440 kg/m3 = 370 kg

● cement quantity in bags = 370 ÷ 50 = 7.4 bags

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Thus you need 7.4 bags of 50 kg cement in 1 cubic metre of of concrete by using nominal mix of 1 part of cement 2 parts of sand with three parts of aggregate with required amount of water at standard condition.