DESIGN MIX (R.C.C) & CO-EFFICIENT FOR PAINTING
Design Mix Concrete*
M-10 (1 : 3.92 : 5.62)
- Cement : 210 Kg/ M3
- 20 mm Jelly : 708 Kg/ M3
- 12.5 mm Jelly : 472 Kg/ M3
- River sand : 823 Kg/ M3
- Total water : 185 Kg/ M3
- Fresh concrete density: 2398 Kg/M3
M-20 ( 1 : 2.48 : 3.55)
- Cement : 320 Kg/ M3
- 20 mm Jelly : 683 Kg/ M3
- 12.5 mm Jelly : 455 Kg/ M3
- River sand : 794 Kg/ M3
- Total water : 176 Kg/ M3
- Admixture : 0.7%
- Fresh concrete density: 2430 Kg/ M3
M-25 ( 1 : 2.28 : 3.27)
- Cement : 340 Kg/ M3
- 20 mm Jelly : 667 Kg/ M3
- 12.5 mm Jelly : 445 Kg/ M3
- River sand : 775 Kg/ M3
- Total water : 185 Kg/ M3
- Admixture : 0.6%
- Fresh concrete density: 2414 Kg/ M3
- Note: sand 775 + 2% moisture, Water 185 -20.5 = 164 Liters,
- Admixture = 0.5% is 100ml
M-30 ( 1 : 2 : 2.87)
- Cement : 380 Kg/ M3
- 20 mm Jelly : 654 Kg/ M3
- 12.5 mm Jelly : 436 Kg/ M3
- River sand : 760 Kg/ M3
- Total water : 187 Kg/ M3
- Admixture : 0.7%
- Fresh concrete density: 2420 Kg/ M3
- Note: Sand = 760 Kg with 2% moisture (170.80+15.20)
M-35 ( 1 : 1.79 : 2.57)
- Cement : 410 Kg/ M3
- 20 mm Jelly : 632 Kg/ M3
- 12.5 mm Jelly : 421 Kg/ M3
- River sand : 735 Kg/ M3
- Total water : 200 Kg/ M3
- Admixture : 0.7%
- Fresh concrete density: 2400 Kg/ M3
- Note: sand = 735 + 2%, Water = 200- 14.7 = 185.30,
- Admixture = 0.7%
M-40 ( 1 : 1.67 : 2.39)
- Cement : 430 Kg/ M3
- 20 mm Jelly : 618 Kg/ M3
- 12.5 mm Jelly : 412 Kg/ M3
- River sand : 718 Kg/ M3
- Water Cement ratio : 0.43
- Admixture : 0.7%
- Note: Sand = 718 + Bulkage 1%
M-45 ( 1 : 1.58 : 2.26)
- Cement : 450 Kg/ M3
- 20 mm Jelly : 626 Kg/ M3
- 12.5 mm Jelly : 417 Kg/ M3
- River sand : 727 Kg/ M3+ Bulkage 1%
- Water Cement ratio : 0.43
- Admixture : 0.7%
M-50 ( 1 : 1.44 : 2.23)
- Cement : 450 Kg/ M3
- 20 mm Jelly : 590 Kg/ M3
- 12.5 mm Jelly : 483 Kg/ M3
- River sand : 689 Kg/ M3 + Bulkage 12%
- Water Cement ratio : 0.36 (188 Kg)
- Admixture : 1.20%3
- Micro silica : 30 Kg
- Super flow 6.7% of cement
WEIGHT OF MATERIALS
- 50 mm J bolt : 751 No’s / 52 Kg
- 40 mm J bolt : 883 No’s / 54 Kg
- 2” nails : 385 No’s / Kg
- 3” nails : 118 No’s / Kg
- 4" nails : 72 No’s / Kg
- Binding wire : 170 rings /Kg
SIMPLEX FORMULA:-
- U = (N /L) x {(W x H) / (1 + S)} x Sq.rt {(L/50)}
- U = Ultimate load in tones
- N = Number of blows
- L = Pile length in feets
- W = Weight of hammer in tones
- H = Height of fall in feet.
- S = Set for 1 blows in Inch
- Safe load = (ultimate load/ 2.5)
- Factor of safety = 2.5
- 10 blows = below 10 MM
Thread couplers: - (For Column lapping)
- Couplers for reinforcing bars 20 mm to 28 mm crimped sleeve
Slump IS 456
- Lightly reinforced 25 – 75 mm
- Heavily reinforced 75 – 100 mm
- Trench fill (insitu & Tremie) 100 – 150 mm
- (For Termie vibrator not required)
Durability:-
- The Environment
- Cover to Steel
- Type and quality of the constituent material
- Cement content and Water Cement ratio.
- Workmanship to obtain full compaction.
- Compaction and efficient curing.
Accuracy of measuring equipment in batching plant.
- Cement: + 2%
- Aggregate: + 3%
- Admixture: + 3%
- Water: + 3%
- Mixing time: 2 minutes for one mixing. (Site Mixing)
CO-EFFICIENT FOR PAINTING:-
- Partly paneled and glazed doors : 0.80 times the door or window area.
- Collapsible gates : 1.50
- Corrugated sheeted steel doors : 1.25
- Rolling shutters : 1.10
- Expanded metal hard drawn steel : 1.00
- Open palsied fencing and gates, brace, rails : 1.00
- Corrugated iron sheeting : 1.14
- A.C corrugated sheeting : 1.20
- A.C Semi corrugated sheeting : 1.10
- Wire gauged shutters : 1.00
- Paneled framed and braced doors, windows : 1.30
- Ledged and battened doors and windows : 1.30
- Flush doors : 1.20
- Partly paneled doors : 1.00
- Fully glazed doors : 0.80
- Fully louvered : 1.80
- Trellis work : 2.00
- Curved or enriched : 2.00
- Weather boarding : 1.20
- Wooded single roofing : 1.10
- Boarding with cover tilets and match boarding : 1.05
- Tile and slate battering : 0.80
- Plain sheet steel : 1.10
- Fully glazed steel : 0.50
Tags:
Civil Engineering