 Civil Engineering

# Basic Practical Knowledge for civil Engineers

## Basic Practical Knowledge for civil Engineers

### Basic Practical Knowledge for Civil Engineers.

In this Article i am going to tell u the basic practical knowledge to Calculate Material on the construction site. This Information is very important for New Comers. ### A = For One m3 of Concrete Mix 1:2:4 (M15)

Add 50% for the wet concrete = 1.50 m3

= 1.50/(1+2+4) = 0.214 m3

For One m3 = 30 bags of the Cement required (1440/50) say 30 bags.
Cement = 0.214 x 30 = 6.42 bags.

Sand = 0.214 x Two = 0.428 m3

Aggregate = 0.214 x Fore = 0.856 m3

#### B = Wall plastering in the CM 1:4 of 12-mm thick for 100 m2.

Volume = 100 x (12/1000) = 1.20 m3

Add 30 to 35% as bulking of the sand = 0.36 m3

Add 20 as wastage of the sand = 0.312 m3

Total = 1.872 m3 = (1.872/1+4) = 0.374-m3

Cement = 0.374 x 30 = 10.77 bags.

Sand = 0.374 x 4 = 1.496 m3

## Thumb Rules For Cement Masonry and Plastering Quantity

### C = For 100 m3 of the solid Block masonry in CM 1:6 mix 8” Thick.

Volume = 100 x 0.2 (Thickness of the wall) = 20 m3

No. of the blocks required = 20/(0.4 x 0.2 x 0.2) = 12502 No’s

Volume of the mortar = 20-{0.39 x 0.19 x 0.19 x 1250} = 20 – 17.598 = 2.40 m3

Note: 200mm – 10 mm for the mortar thickness = 190 mm

Blocks =17.598/(0.4 x 0.2 x 0.2) =1100 No’s Add Two % wastage = 22 Total = 1122 No’s

Increase by 25% for dry mortar = Three M3

= Three/ (1+6) = 0.429 M3

Cement = 0.429 x 30 = 12.50 bags.

Sand = 0.429 x Six = 2.57 M3

Blocks =1122 No’s.