CONCRETEGRADE:M5 = 1:4:8M10= 1:3:6M15= 1:2:4M20= 1:1.5:3M25= 1:1:2CLEAR COVER TO MAINREINFORCEMENT:1.FOOTINGS : 50 mm2.RAFT FOUNDATION.TOP : 50 mm3.RAFT FOUNDATION.BOTTOM/SIDES : 75 mm4.STRAP BEAM : 50 mm5.GRADE SLAB : 20 mm6.COLUMN : 40 mm7.SHEAR WALL : 25 mm8.BEAMS : 25 mm9.SLABS : 15 mm10.FLAT SLAB : 20 mm11.STAIRCASE : 15 mm12.RET. WALL : 20/ 25 mm on earth13.WATER RETAINING STRUCTURES :20/30 mmWEIGHT OF ROD PER METER LENGTH:DIA WEIGHT PER METER6mm = 0.222Kg8mm = 0.395 Kg10mm = 0.616 Kg12mm = 0.888 Kg16mm = 1.578 Kg20mm = 2.466 Kg25mm = 3.853 Kg32mm = 6.313 Kg40mm = 9.865 Kg1bag cement-50kg1feet-0.3048m1m-3.28ft1sq.m-10.76sq.f¬t1cu.m-35.28cu.f¬t1acre-43560sq.f¬t1cent-435.6sq.f¬t1hectare-2.47ac¬re1acre-100cent-4¬046.724sq.m1ground-2400sq.¬ft1unit-100cu.ft-¬2.83cu.m1square-100sq.f¬t1 M LENGTH STEEL ROD I ITS VOLUMEV=(Pi/4)*Dia x DiaX L=(3.14/4)x D xD X 1 (for1m length) Density of Steel=7850 kg/cub meterWeight = Volume x Density=(3.14/4)xD x D X1x7850 (if D is in mm ) So = ((3.14/4)xD x D X1x7850)/(1000x1000) = Dodd/162.27DESIGN MIX:M10 ( 1 : 3.92 : 5.62)Cement : 210 Kg/ M 320 mm Jelly : 708 Kg/ M 312.5 mm Jelly : 472 Kg/ M 3River sand : 823 Kg/ M 3Total water : 185 Kg/ M 3Fresh concrete density: 2398 Kg/M 3M20 ( 1 : 2.48 : 3.55)Cement : 320 Kg/ M 320 mm Jelly : 683 Kg/ M 312.5 mm Jelly : 455 Kg/ M 3River sand : 794 Kg/ M 3Total water : 176 Kg/ M 3Admixture : 0.7%Fresh concrete density: 2430 Kg/ M 3M25 ( 1 : 2.28 : 3.27)Cement : 340 Kg/ M 320 mm Jelly : 667 Kg/ M 312.5 mm Jelly : 445 Kg/ M 3River sand : 775 Kg/ M 3Total water : 185 Kg/ M 3Admixture : 0.6%Fresh concrete density: 2414 Kg/ M 3Note: sand 775 + 2% moisture,Water185 -20.5 =164 Liters,Admixture = 0.5% is 100mlM30 ( 1 : 2 : 2.87)Cement : 380 Kg/ M 320 mm Jelly : 654 Kg/ M 312.5 mm Jelly : 436 Kg/ M 3River sand : 760 Kg/ M 3Total water : 187 Kg/ M 3Admixture : 0.7%Fresh concrete density: 2420 Kg/ M 3Note: Sand = 760 Kg with 2% moisture(170.80+15.20)M35 ( 1 : 1.79 : 2.57)Cement : 410 Kg/ M 320 mm Jelly : 632 Kg/ M 312.5 mm Jelly : 421 Kg/ M 3River sand : 735 Kg/ M 3Total water : 200 Kg/ M 3Admixture : 0.7%Fresh concrete density: 2400 Kg/ M 3Note: sand = 735 + 2%, Water = 200-14.7 =185.30,Admixture = 0.7%M40 ( 1 : 1.67 : 2.39)Cement : 430 Kg/ M 320 mm Jelly : 618 Kg/ M 312.5 mm Jelly : 412 Kg/ M 3River sand : 718 Kg/ M 3Water Cement ratio : 0.43Admixture : 0.7%Note: Sand = 718 + Bulk age 1%M45 ( 1 : 1.58 : 2.26)Cement : 450 Kg/ M 320 mm Jelly : 626 Kg/ M 312.5 mm Jelly : 417 Kg/ M 3River sand : 727 Kg/ M 3 + Bulk age1%Water Cement ratio : 0.43Admixture : 0.7%M50 ( 1 : 1.44 : 2.23)Cement : 450 Kg/ M 320 mm Jelly : 590 Kg/ M 312.5 mm Jelly : 483 Kg/ M 3River sand : 689 Kg/ M 3 + Bulk age12%Water Cement ratio : 0.36 (188 Kg)Admixture : 1.20%3Micro silica : 30 KgSuper flow 6.7% of cement1 cubic meter contains 500 bricksThe Standard size of the 1st classbrick is 190mmx 90mm x90mm and motor joint should be 10mmthickSo brick with motor=200 x 100 x 100.Volume of 1st class brick = 0.19 x 0.09X 0.09 =0.001539cu.mVolume of 1st class brick with motor=0.2 x 0.1 x0.1=0.002cu.mNo. on bricks per 1cu.m= 1/volumeof1st classbrick withmotor=1/0.002= 500 no’s of bricksSTANDARD CONVERSION FACTORSINCH = 25.4 MILLIMETREFOOT = 0.3048 METREYARD = 0.9144 METREMILE = 1.6093 KILOMETERACRE = 0.4047 HECTAREPOUND = 0.4536 KILOGRAMDEGREE FARENHEIT X 5/9 – 32 =DEGREECELSIUSMILLIMETRE= 0.0394 INCHMETRE = 3.2808FOOTMETRE = 1.0936YARDA rope having length 100cm.You canform anyshape using this rope (Example:Triangle,Rectangle, etc.,). Which shape willcoversmaximum area1 Newton = o.101971 kg1 mm2 = 0.01 cm21 cm2 = 100 mm21 mm2 = 20 N100 mm2 = 2000N1 cm2 = 2000N2000 N = 203.942 kgSo 20 N/ mm2 = 203.942 kg / cm2RATIO IS 1:1.5:3then volume is 1+1.5+3=5.5 and thetotal volumefor using mix=1 hr · Civil Work
Posted on: Wed, 05 Nov 2014 12:01:58 +0000
Trending Topics
Recently Viewed Topics
© 2015