Highway & QA QC™

CONCRETE GRADE: M5 = 1:4:8 M10= 1:3:6 M15= 1:2:4 M20= 1:1.5:3 M25= 1:1:2 CLEAR COVER TO MAIN REINFORCEMENT: 1.FOOTINGS : 50 mm 2.RAFT FOUNDATION.TOP : 50 mm 3.RAFT FOUNDATION.BOTTOM/SIDES : 75 mm 4.STRAP BEAM : 50 mm 5.GRADE SLAB : 20 mm 6.COLUMN : 40 mm 7.SHEAR WALL : 25 mm 8.BEAMS : 25 mm 9.SLABS : 15 mm 10.FLAT SLAB : 20 mm 11.STAIRCASE : 15 mm 12.RET. WALL : 20/ 25 mm on earth 13.WATER RETAINING STRUCTURES : 20/30 mm WEIGHT OF ROD PER METER LENGTH: DIA WEIGHT PER METER 6mm = 0.222Kg 8mm = 0.395 Kg 10mm = 0.616 Kg 12mm = 0.888 Kg 16mm = 1.578 Kg 20mm = 2.466 Kg 25mm = 3.853 Kg 32mm = 6.313 Kg 40mm = 9.865 Kg 1bag cement-50kg 1feet-0.3048m 1m-3.28ft 1sq.m-10.76sq.f ¬t 1cu.m-35.28cu.f ¬t 1acre-43560sq.f ¬t 1cent-435.6sq.f ¬t 1hectare-2.47ac ¬re 1acre-100cent-4 ¬046.724sq.m 1ground-2400sq. ¬ft 1unit-100cu.ft- ¬2.83cu.m 1square-100sq.f ¬t 1 M LENGTH STEEL ROD I ITS VOLUME V=(Pi/4)*Dia x DiaX L=(3.14/4)x D x D X 1 (for 1m length) Density of Steel=7850 kg/ cub meter Weight = Volume x Density=(3.14/4)x D x D X 1x7850 (if D is in mm ) So = ((3.14/4)x D x D X 1x7850)/(1000x1000) = Dodd/162.27 DESIGN MIX: M10 ( 1 : 3.92 : 5.62) Cement : 210 Kg/ M 3 20 mm Jelly : 708 Kg/ M 3 12.5 mm Jelly : 472 Kg/ M 3 River sand : 823 Kg/ M 3 Total water : 185 Kg/ M 3 Fresh concrete density: 2398 Kg/M 3 M20 ( 1 : 2.48 : 3.55) Cement : 320 Kg/ M 3 20 mm Jelly : 683 Kg/ M 3 12.5 mm Jelly : 455 Kg/ M 3 River sand : 794 Kg/ M 3 Total water : 176 Kg/ M 3 Admixture : 0.7% Fresh concrete density: 2430 Kg/ M 3 M25 ( 1 : 2.28 : 3.27) Cement : 340 Kg/ M 3 20 mm Jelly : 667 Kg/ M 3 12.5 mm Jelly : 445 Kg/ M 3 River sand : 775 Kg/ M 3 Total water : 185 Kg/ M 3 Admixture : 0.6% Fresh concrete density: 2414 Kg/ M 3 Note: sand 775 + 2% moisture, Water185 -20.5 = 164 Liters, Admixture = 0.5% is 100ml M30 ( 1 : 2 : 2.87) Cement : 380 Kg/ M 3 20 mm Jelly : 654 Kg/ M 3 12.5 mm Jelly : 436 Kg/ M 3 River sand : 760 Kg/ M 3 Total water : 187 Kg/ M 3 Admixture : 0.7% Fresh concrete density: 2420 Kg/ M 3 Share to all👉👉