Basic Important Point for Civil/Site Engineer

 Basic Important Point for Civil/Site Engineer

Bellow are some info & Standards that help for civil, Design, Site Engineers

1-     Concrete Grade:

Concrete Grade:	Mix Ratio
M5 or M50	1 : 4 : 8
M10 or M100	1 : 3 : 6
M15 or M 150	1 : 2 : 4
M20 or M200	1 : 1.5 : 3
M25 or 250	1 : 1 : 2
M30 or M300	1 : 0.75 : 1.5

 For the Calculation, the procedure follows bellow link Step 4: Step 3: Calculation of Cement, Sand, Aggregate in Concrete.

2-     Concrete Grade Mixture:

2.1. M5 or M50  (1:4:8):

M50 = 50 Mpa = 725 Psi

Cement = 141 Kgr

Water = 70.5 Liter

2.2. M10 or M100 (1 : 3 : 6):

M50 = 50 Mpa = 1450 Psi

Cement = 226 Kgr

Water = 87 Lit

2.3. M15 or M 150 (1 : 2 : 4):

M50 = 50 Mpa = 2175 Psi

Cement = 320 Kgr

Sand = 717.8 Kgr

Water = 161 Liter

2.4. M20 or M200 (1: 1.5: 3):

M20 = 200 Mpa = 2900 Psi

Cement = 403 Kg

Water: 201 Lit

Sand & Other = 672 Kgr

2.5. M25 or 250 (1 : 1 : 2):

M25 = 250 Mpa = 3625 Psi

Cement = 565 Kg = 7 Bigs

Water: 282 Kgr

Sand, Agg & Other: 565 Kgr

2.5. M30 or M300 (1 : 0.75 : 1.5):

M30 = 300 Mpa

M30 = 4350 Psi

Cement = 452 Kgr

Water = 282 Lit

3-     Reinforcement Concrete Cover:

Footing	50 mm
Raft Foundation Top	50 mm
Raft Foundation Bottom/ Sides	50 - 75 mm
Strap Beam	50 mm
Grade Slab	20 mm
Column	40 mm
Shear Wall	25 mm
Beams	25 mm
Slabs	15 mm
Flat Slab	20 mm
Staircase	15 mm
Retaining Wall	20 – 25 mm
Water Retaining Wall	20 – 30 mm

4-     Stripping Time (De-Shuttering) of Reinforcement Concrete.

Vertical Form Work (Wall, Columns, etc.)	1 – 2 Days
Soffit Formwork to Slabs	3 Days (Props to be refixed after removal)
Soffit to beams props	7 Days Props to refix after removal
Spanning Up to 4.5 m	7 Days
Spanning Over 4.5 m	14 Days
Arches Spanning up to 6 m	14 Days
Arches Spanning Over 6 m	21 Days

 

5-     Weight of Engineering Materials (Density of Some Construction Materials).

Bitumen	1340 Kg/Cu M
Cement	1440 Kg/Cu M
Stone	2850 to 2960 Kg/Cu M
Water	1000 Kg/Cu M
PCC	2200 to 2250 Kg/Cu M
RCC	2420 Kg/Cu M – for 2% steel
Bricks	1600 to 1920 Kg/Cu M
Cast Iron	7650 Kg/Cu M
Steel	7850 Kg/Cu M
Ice	913 Kg/Cu M
Petrol	690 Kg/Cu M

 For more Materials follow this link: Density of Construction Materials:

6-     Weight of Steel Bar Per Meter:

6 mm	0.222 Kg/M
8 mm	0.395 Kg/M
10 mm	0.616 Kg/M
12 mm	0.888 Kg/M
16 mm	1.578 Kg/M
20 mm	2.466 Kg/M
25 mm	3.853 Kg/M

Formula Weight Per Meter = L.D2/162.

For Calculation follow this link How to find steel Bars weight per meter

7-     Standard Conversion Factors:

1 Kilo Meter	1000 Meter
1 Kilo Meter	0.62 Mile
1 Meter	100 Centimeter
1 Meter	3.28 Feet
1 Meter	1.093 Yard
1 Meter	1000 Millimeter
1 Centimeter	10 millimeters
1 Centimeter	0.393 Inch
1 Inch	2.54 Centimeter
1 Foot	0.305 Meter
1 Yard	0.913 Meter