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Construction-Materials-Unit-Factors

Useful Information of Civil Engineering

 

Grades of Concrete:

GRADE OF CONCRETE

MIX RATIO (C:S:A)

M5

1:4:8

M10

1:3:6

M15

1:2:4

M20

1:1.5:3

M25

1:1:2

Unit Weight of Civil Engineering Materials:

MATERIALS

UNIT WEIGHT (KG/M3)

Cement

1440 Kg/m3

P.C.C

2400 Kg/m3

R.C.C

2500 Kg/m3

Cement Plaster

2000 Kg/m3

Bitumen

1340 Kg/m3

Glass

2500 Kg/m3

Water

1000 Kg/m3

Standard Conversion Factors:

1 meter

3.28 feet

1 meter

39.37 inches

1 meter

100 centimeter

1 meter

1000 millimeter

1 foot

12 inches

1 inch

2.54 centimeter

1 inch

8 soot

Standard Cover for Different R.C.C Structures:

STRUCTURE

STANDARD COVER

Foundation

75 millimeter

Raft Foundation

Top – 50 millimeter

Bottom & Sides – 75 millimeter

Strap Beam

50 millimeter

Beam

25 millimeter

Column

40 millimeter

Flat Slab

20 millimeter

Slab

15 millimeter

Unit Weight of Steel Per Meter:

DIAMETER OF STEEL

WEIGHT (KG/M)

6 mm

0.222 Kg/m

8 mm

0.395 Kg/m

10 mm

0.660 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

Basic Area Unit:

AREA UNIT

SQFT/M

1 Kanal

20 Marla

1 Marla

272.24 Sqft

1 Kanal

502 Meter Sqm

1 Marla

25.10 Sqm

1 Hectare

1000 Sqm

1 Acre

43560 Sqft

Grades of OPC:

OPC (Ordinary Portland Cement)

33 Grade

33 N/mm2

43 Grade

43 N/mm2

53 Grade

53 N/mm2

Setting Time of Cement:

TYPE OF CEMENT

INITIAL SETTING TIME

FINAL SETTING TIME

OPC (Ordinary Portland Cement)

30 Min

600 Min

Portland Blast Furnace Cement

30 Min

600 Min

RHC (Rapid Hardening Cement)

30 Min

600 Min

LDC (Low Heat Cement

60 Min

600 Min

Water Absorption of Bricks: 

1st Class Brick

15% by dry weight

2nd Class Brick

20% by dry weight

3rd Class Brick

22% by dry weight
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