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
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■ 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
please explain m40 design mix concrete
Excellent explanation