This document provides information on concrete mix ratios and proportions designated as M5, M10, M15, etc. along with cover requirements for reinforcement. It also includes weights of steel reinforcement by diameter, concrete design mixes, conversion factors, and other reference tables for materials quantities and properties used in construction.
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Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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Construction detail
1. -
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
2. 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
Note: Sand = 760 Kg with 2% moisture
(170.80+15.20)
STANDARD CONVERSION FACTORS
INCH = 25.4 MILLIMETRE
FOOT = 0.3048 METRE
YARD = 0.9144 METRE
MILE = 1.6093 KILOMETER
ACRE = 0.4047 HECTARE
POUND = 0.4536 KILOGRAM
3. DEGREE FARENHEIT X 5/9 – 32 = DEGREE
CELSIUS
MILLIMETRE= 0.0394 INCH
METRE = 3.2808FOOT
METRE = 1.0936YARD
MATERIAL CALCULATION:
CEMENT IN BAGS
01. PCC 1:5:10 1440/5*0.45 129.60Kg 2.59
02. PCC 1:4:8(M 7.5) 1440/4*0.45 162.00Kg 3.24
03. PCC 1:2:4(M 15) 1440/2*0.45 324.00Kg 6.48
04. PCC 1:3:6(M 10) 1440/3*0.45 216.00Kg 4.32
05. RCC 1:2:4(M 15) 144/2*0.45 324.00Kg 6.48
06. RCC 1:1.5:3(M 20) 1440/1.5*0.45 32.00Kg
8.64
07. RCC 1:1:2(M 25) 370.00Kg 7.40
08. RCC M 30 410.00Kg 8.20
09. RCC M35 445.00Kg 8.90
10. RCC M40 480.00Kg 9.60
11. Damp Proof Course
CM1:3,20mm tk 1440/3*0.022 10.56Kg 0.21
12. 2"tk precast slab M15 324*0.05 16.20Kg 0.32
13. 3"tk precast slab M15 324*0.075 24.30Kg
0.49
14. GC Masonry CM 1:7 1440/7*0.34 70.00Kg
1.40
15. Brick Work CM 1:6 1440/6*0.25 60.00Kg 1.20
16. Brick Work CM 1:4, 115tk 1440/4*0.25*0.115
10.35Kg 0.21
17. Grano Flooring CC 1:1.5:3 1440/1.5*0.45*0.05
21.60Kg 0.43
18. Plastering CM 1:3, 12mm tk 1440/3*0.014
6.72Kg 0.13
19. Wall Plastering CM 1:4,
12mm tk 1440/4*0.014 5.00Kg 0.10
20. Laying Pressed Tiles Over
a CM 1:4, 20mm tk 1440/4*0.022 7.92Kg 0.16
21. Ceramic Tiles, Marble,
Granite, Caddapah Slab
CM 1:4, 20mm tk 1440/4*0.022 7.92Kg 0.16
22. Hollow Block Masonry
CM 1:6, 200mm tk/m¬2¬ 10.00Kg 0.20
SAND CALCULATION (CFT):
01. Any Concrete Work
(PCC, RCC) 0.45*35.315= 20.00
02. Damp Proof Course
CM `1:3, 20mm tk 1.00
03. 2"tk Precast slab M15 1.00
4. 04. 3"tk Precast slab M15 1.50
05. SS Masonry in CM 1:7 15.00
06. Brick Work in CM 1:6 15.00
07. Brick Work in CM 1:4,115mm tk 2.00
08. Grano Flooring in CC 1:1.5:3 1.00
09. Plastering in CM 1:3, 12mm tk 1.00
10. Wall Plastering CM 1:4, 12mm tk 1.00
11. Laying Pressed Tiles over a CM 1:4, 20mm tk
1.00
12. Ceramic Tiles, Marble, Granite, Cuddapah slab
CM 1:4, 20mm tk 1.00
METAL CALCULATION:
01. Any Concrete Work 32.00 cft
02. Grano Flooring in CC 1:1.5:3, 50mm tk 1.60
cft
03. Grano Flooring in CC 1:1.5:3, 75mm tk 2.40
cft
04. Grano Flooring in CC 1:1.5:3, 100mm tk 3.20
cft
05. Bricks/cum 450.00 Nos
06. Size Stone/ cum 90.00 Nos
07. Rough Stone 10.00 cft
08. Bond Stone/ cum 10.00 Nos
09. Cement Paint/100 Sft 2.00 Kg
10. White Cement/100 Sft 2.00 Kg
11. Janathacem/100 Sft 1.50 Kg
12. Enamel Paint/100 Sft - 2 Coats 1.25 Litre
13. Wall Putty/100 Sft 10.00 Kg
14. Plaster of Paris/100 Sft 25.00 Kg
15. Distember/100 Sft 2.00 Kg
16. Cement Primer 0.60 Litre
0.40 Litre
17. Weathering Course
Lime 12.50 Kg
Brick bats 32.00 Kg
18. Providing Sand Gravel Mix- Cum
Sand 20.00 Cft
Gravel 40.00 Cft
19.WBM - 75mm tk - 1st Layer - 10 Sqm
Metel(60-40 mm) 35.00 Cft
Gravel 10.00 Cft
20. Pressed Tiles - Sqm 20.00 Nos
21. Hollow Block - 200mm tk 14.00 Nos
CONVERSION TABLE:
01. 1 RM 3.28 Rft
02. 1 Sqm 10.76 Sft
03. 1 Cum 35.32 Cft
04. 1 Inch 2.54 cm
