How Much Material is Required for a 100 Square Feet RCC Slab?

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How Much Material is Required For a 100 Square Feet RCC Slab?

475.2 kg cement, 17.5 cft fine aggregate, 35 cft coarse aggregate and 285 kg steel reinforcement is required for a 100 square feet rcc slab of 4 inch thickness with M20 grade of concrete. Read the calculation below to understand in detail.

How Much Material is Required For a 100 Square Feet RCC Slab

Calculation of Materials Required for a 100 Sq Ft RCC Slab (5 Inch)

To calculate the quantity of cement, sand, coarse aggregate and steel required for a 100 square feet slab, we have some requirements and considerations in the slab.

Requirements and Considerations for the Slab

  • Size of Slab = 100 Square Feet
  • Thickness of Slab = 5 Inch
  • Grade of Concrete Used = M20

Volume of Slab (RCC Work) Calculation

Volume of RCC Slab
= Area of Slab × Thickness of Slab
= 100 Square Feet × (5 Inch/12) Feet
41.67 cft
Hence, Total Volume of RCC Work
= 41.67 cft (Wet Concrete).

Dry Volume of Concrete Calculation

  • Ratio of Concrete (M20) = 1:1.5:3 (Cement : Sand : Coarse Aggregate)
  • Shrinkage Factor = 1.54 (54 % extra for dry volume)
  • Total Concrete Ratio (1:1.5:3) = 1+1.5+3 = 5.5
  • Total Volume of Dry Concrete = 1.54 × 41.67 cft = 64.17 cft 

Volume of Cement in RCC Work

= (Ratio of Cement/ Total Ratio of Concrete) × Total Volume of Dry Concrete
= (1/5.5) × 64.17 cft
11.67 cft or 0.33 m³
Since, density of cement is 1440 m³/kg
So, weight of cement is 0.33 m³ × 1440 kg/m³ = 475.2 kg

Volume of Sand (Fine Aggregate) in RCC Work

= (Ratio of Sand/ Total Ratio of Concrete) × Total Volume of Dry Concrete
= (1.5/5.5) × 64.17 cft
17.5 cft

Volume of Coarse Aggregate in RCC Work

= (Ratio of Aggregate/ Total Ratio of Concrete) × Total Volume of Dry Concrete
= (3/5.5) × 64.17
35 cft

Weight of Steel in RCC Work

Considering volume of Steel is 2% of total volume of concrete.
= 64.17 × 2 /100
= 1.283 cft or 0.0363 m³
Density of Steel is 7850 kg/m³ 
Weight of Steel = 7850 × 0.0363 = 285 kg

Material Required for a 100 Square Feet 5 Inch RCC Slab

  • Total Cement Required = 475.2 kg
  • Total Sand Required = 17.5 cft
  • Total Aggregate Required = 35 cft
  • Total Weight of Steel Required = 285 kg

Note: This quantity just for reference and it is based on above assumptions and it may vary depending upon material type and other design changes.

Calculation of Materials Required for a 100 Sq Ft RCC Slab (4 Inch)

To calculate the quantity of cement, sand, coarse aggregate and steel required for a 100 square feet slab, we have some requirements and considerations in the slab. In this, we are considering 4 inch thickness of the slab.

Requirements and Considerations for the Slab

  • Size of Slab = 100 Square Feet
  • Thickness of Slab = 4 Inch
  • Grade of Concrete Used = M20

Volume of Slab (RCC Work) Calculation

Volume of RCC Slab
= Area of Slab × Thickness of Slab
= 100 Square Feet × (4 Inch/12) Feet
33.33 cft
Hence, Total Volume of RCC Work
= 33.33 cft (Wet Concrete).

Dry Volume of Concrete Calculation

  • Ratio of Concrete (M20) = 1:1.5:3 (Cement : Sand : Coarse Aggregate)
  • Shrinkage Factor = 1.54 (54 % extra for dry volume)
  • Total Concrete Ratio (1:1.5:3) = 1+1.5+3 = 5.5
  • Total Volume of Dry Concrete = 1.54 × 33.33 cft = 51.33 cft 

Volume of Cement in RCC Work

= (Ratio of Cement/ Total Ratio of Concrete) × Total Volume of Dry Concrete
= (1/5.5) × 51.33 cft
= 9.33 cft or 0.264 m³
Since, density of cement is 1440 m³/kg
So, weight of cement is 0.264 m³ × 1440 kg/m³ = 380.2 kg

Volume of Sand (Fine Aggregate) in RCC Work

= (Ratio of Sand/ Total Ratio of Concrete) × Total Volume of Dry Concrete
= (1.5/5.5) × 51.33 cft
= 14 cft

Volume of Coarse Aggregate in RCC Work

= (Ratio of Aggregate/ Total Ratio of Concrete) × Total Volume of Dry Concrete
= (3/5.5) × 51.33
= 28 cft

Weight of Steel in RCC Work

Considering volume of Steel is 2% of total volume of concrete.
= 51.33 × 2 /100
= 1.027 cft or 0.0291 m³
Density of Steel is 7850 kg/m³ 
Weight of Steel = 7850 × 0.0291 = 228 kg

Material Required for a 100 Square Feet 4 Inch RCC Slab

  • Total Cement Required = 380.2 kg
  • Total Sand Required = 14 cft
  • Total Aggregate Required = 28 cft
  • Total Weight of Steel Required = 228 kg

Note: This quantity just for reference and it is based on above assumptions and it may vary depending upon material type and other design changes.

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