How much cement required in 1750 sq.ft for roof slab casting,RCC slab construction cost for 1750 sq.ft slab,in this topic we know about how much cement required in 1750 sq.ft for slab and RCC slab construction cost for 1750 square feet slab we have required Steel ,cement, sand and aggregate quantity calculation and their rates.

for roof cost of 1750 square feet slab we have required standard grade of concrete mix like M20 or M25 .roof casting is done whenever proper curing of brick wall is completed. quantity of cement sand and aggregates calculation and

how much cement required in 1750 sq.ft for slab

**Quantity of cement sand and aggregates for 1750 sq.ft slab**

■ **grade of concrete** :- we can use M20 or M25 grade of concrete for roof casting or slab formation . M stand for mix and number indicates the comprehensive strength of concrete in curing time of 28 days.comprehensive strength of M20 grade of concrete is 20N/mm2 and comprehensive strength of m25 grade of concrete is 25 N/mm2.

◆ **concrete ratio in M20** :- ratio of cement sand and aggregate in M20 mix is ( 1: 1.5 : 3) one part is cement 1.5 part is sand and three part is aggregate.

**Quantity of cement sand and aggregates for 1750 sq.ft slab**

◆ **Concrete ratio in M25**:- ratio of cement sand and aggregate in M25 mix is ( 1: 1 : 2) one part is cement 1part is sand and 2 part is aggregate.

Note:- 1) upto 3 floor building we can use M20 grade of concrete

2) for high rise building structure we can use m25 grade of concrete

**Quantity of steel required for 1750 sqft slab**

■ **Steel bar calculation** :- in roof slab there are two types of Steel bar is used one is main bar and second one is cross bar.

1) **main bar** :- 12 mm diameter of Steel Bar used as main bar . it is shortist span bar usually used at bottom of slab having spacing 4 inch between the two bar and also main bar used in shorter direction.

2) **cross bar** :- 10 mm diameter of Steel used as cross bar ,it is also called longer span or distribution bar are used at top of the main Bar .cross bar is used in longer direction having Centre to Centre spacing is 5 inches between two bar.

◆ **concrete volume calculation for slab**

◆ **given dimension :-**

Thickness of slab = 5″

Length of slab = 50′

Width of slab = 35′

Area of slab = 50′ × 32′ = 1750 sq. ft

Wet volume = area of slab× thickness

1 feet = 12 inches

Wet volume = 1750 sq. ft× 5/12 ft

Wet volume = 729.17 cu.ft

if you want to convert into cubic meter you should divide by 35.32

1 m3 = 35.32 cu. ft

Wet volume = 729.17/35.32 = 20.64 m3

◆ **Dry volume** :- we know that wet volume have air Bubbles and water it can be removed by vibrator or compressor machine. so more quantity of cement sand and aggregate is required and dry volume is increased by 54% of wet volume so we can multiply cofactor 1.54 in wet volume to calculate dry volume

Dry volume = 20.64 m3× 1.54 = 31.78 m3

**Steel reinforcement required for slab of 1750 square feet**

According to Thumb Rule for slab quantity of steel required for slab is about 0.5% to 1% of dry volume of concrete than we take average is 0.75% dry volume of concrete.

Density of steel = 7850 kg/m3

Weight of steel = volume × density

Weight of steel = 0.75/100×(31.78m3×7850kg/m3)

Weight of steel = 1871 kg

1871 kg weight of Steel bar is required for 1750 square feet rcc roof slab

If market rate of steel bar is rs 60 per kg, but it will be very according to quality and brand rs 5 to 10 up and down

Total cost of steel = 1871× 60

Total cost of steel = rs 112262

1871 kg weight of Steel bar is required for 1750 square feet rcc roof slab and their construction cost is rs 112262 for steel

**Quantity of cement required for 1750 sqft slab**

Ratio in M20 grade = 1:1.5:3

Total proportion = 1+ 1.5+3 = 5.5

Part of cement = 1/5.5

Part of sand = 1.5/5.5

Part of aggregate = 3/5.5

**How much cement required in 1750 sq.ft for slab**

1) quantity of cement in M20 grade of concrete for 1750 sq. ft slab and how much cement required in 1750 sq.ft for slab

Weight = volume × density

Density of cement = 1440 kg/m3

Weight = (1× 31.78 m3× 1440 kg/m3)/5.5

Weight of cement = 8320 kg

1 bag cement = 50 kg

No of bags cement = 8320/50 = 166

If market rate of cement bag is rs 350

Than total cost = 166× rs 350

Total cost of cement = rs 58244

166 bags (8320 kg) cement are required for 1750 sqft rcc roof slab and their construction cost is rs 58244 for cement.

**Quantity of sand required for 1750 sqft slab**

quantity and cost of sand in M20 grade of concrete for 1750 sq. ft slab

Part of sand in m20 = 1.5/5.5

1 m3 = 35.32 cuft

Volume of sand in cu. ft

= 1.5/5.5( 31.78× 35.32) = 306 cuft

Volume of sand = 306 cubic feet

Market rate of sand vary according to location and availability rs 40 -80 per cubic feet

If rate of sand is rs 60 per cft than

Total cost of sand = 306 × rs 60

Total cost of sand = rs 18368

306 cuft quantity of sand is required for 1750 sqft rcc roof slab and their construction cost is rs 18368 for sand.

**Quantity of aggregate required for 1750 sqft slab**

**quantity and cost of aggregates in M20 grade of concrete for 1750 sq. ft slab**

Part of aggregates in m20 = 3/5.5

Volume of aggregate in cft

Volume = (3/5.5)× 31.78×35.32

Volume of aggregates = 612 cft

If market rate of aggregate is rs 70 per sq. ft than

total cost of aggregate = rs70× 612

Total cost of aggregates = rs 42840

612 cuft quantity of aggregate is required for 1750 sqft rcc roof slab and their construction cost is rs 42840

**labour cost for 1750 sq. ft slab**

Labour cost for Casting of slab is vary from location to location and availability of labour and season

If labour cost is rs 50 per sq. ft

Total labour cost = rs 50× 1750

Total labour cost = rs 87500

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**RCC slab construction post for 1750 sqft slab**

now total cost of materials for roof cast of 1750 square feet roof slab

Steel cost = rs 112262

Cement cost = rs 58244

Cost of sand = rs 18368

Aggregate cost = rs 42840

Labour cost = rs 87500

Total cost = rs 319214

1871 kg quantity of steel,166 bags (8320 kg) cement,306 cuft quantity of sand and 612 cuft quantity of aggregate is required for roof casting of 1750 sqft rcc slab and their total construction cost of material is rs 319214 including labour cost.

**quantity of cement sand and aggregate in M25 grade of concrete for 1750 sqft slab**

Ratio in M25 grade = 1:1:2

Total proportion = 1+ 1+2 = 4

Part of cement = 1/4

Part of sand = 1/4

Part of aggregate = 2/4

1) quantity of cement in M25 grade of concrete for 1750 sq. ft slab

Weight = volume × density

Density of cement = 1440 kg/m

Weight = (1× 29 m3× 1440 kg/m3)/4

Weight of cement = 10440 kg

1 bag cement = 50 kg

No of bags cement = 10440/50 = 209 bags

If market rate of cement bag is rs 360

Than total cost = 209× rs 360

Total cost of cement = rs 75168

2) quantity and cost of sand in M25 grade of concrete for 1600 sq. ft slab

Part of sand in m25 = 1/4

1 m3 = 35.32 cuft

Volume of sand in cu. ft

= 1/4( 29× 35.32) = 256 cuft

Volume of sand = 256 cubic feet

Market rate of sand vary according to location and availability rs 40 -80 per cubic feet

If rate of sand is rs 60 per cft than

Total cost of sand = 256 × rs 60

Total cost of sand = rs 15364

3) quantity and cost of aggregates in M25 grade of concrete for 1600 sq. ft slab

Part of aggregates in m25 = 2/4

Volume of aggregate in cft

Volume = (2/4)× 29×35.32

Volume of aggregates = 512 cft

If market rate of aggregate is rs 70 per sq. ft than

total cost of aggregate = rs70× 512

Total cost of aggregates = rs 35840

4) labour cost for slab of 1600 sq. ft

Labour cost for Casting of slab is vary from location to location and availability of labour and season

If labour cost is rs 50 per sq. ft

Total labour cost = rs 50× 1600

Total labour cost = rs 80000

■ now total cost of materials for roof cast of 1750 square feet roof slab

Steel cost = rs 102440

Cement cost = rs 75168

Cost of sand = rs 15364

Aggregate cost = rs 35840

Labour cost = rs 80000

Total cost = rs 336812

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