 |
| Engineering Tips |
After
compilation of Engineering we are not well knowledge about how to work at site,
which type of work is to do first, how to check the quality of work and
workmanship because we are fresher Civil engineer does many work and activities
at construction site and there are many works which are repetitive in nature.
So, some points, tips and tricks which a civil site engineer should most remember
while working on the site for faster calculations as well as quick solutions
and supervision to construction site problems.
The maintaining of an
adequate amount of moisture content and temperature in concrete at early ages
so that it can provide or give the properties the mixture was design to achieve.
Curing begins
immediately after RCC or PCC work and finishing so that the concrete may develop
the desired strength and durability. It is very important step in building
a structure. Because without curing the concrete doesn’t achieve its full
strength. So the strength of concrete is decreased without curing.
adequate amount of moisture content and temperature in concrete at early ages
so that it can provide or give the properties the mixture was design to achieve.
Curing begins
immediately after RCC or PCC work and finishing so that the concrete may develop
the desired strength and durability. It is very important step in building
a structure. Because without curing the concrete doesn’t achieve its full
strength. So the strength of concrete is decreased without curing.
Curing
period is generally having minimum seven days for all member.
period is generally having minimum seven days for all member.
Curing time of RCC
member on the behalf of type of Cement:
member on the behalf of type of Cement:
1.
Concrete
Work:
Concrete
Work:
a. Rapid Hardening Cement
– 7 days
– 7 days
- High
Alumina Cement – 24 hours - Ordinary
Portland Cement – 14 days - Minerals
& Admixture added cement – 14 days - Super
Sulphate cement – 7 days
2.
Brick
Masonry – 10 days
Brick
Masonry – 10 days
3.
Plaster
– 7 days
Plaster
– 7 days
Key Point to remember for Site Engineer
Following are few general points to remember
for civil site engineers to make the construction work easier while maintaining
quality of construction.
for civil site engineers to make the construction work easier while maintaining
quality of construction.
- Lapping of
reinforcement is not less than 50d. - Lapping is
not allowed for the bars having diameters more than 36 mm. - Chair spacing maximum spacing is 3 feet.
- For dowels
rod minimum of 12 mm diameter should be used. - Chairs bar
minimum of 12 mm diameter bars to be used. - Minimum
bars for square column is 4 No’s and 6 No’s for circular column. - Main bars
in the slabs shall not be less than 8 mm or 10 mm (Plain bars) and the
distributors not less than 8 mm and not more than 1/8 of slab thickness. - Minimum
thickness of slab is 125 mm. - Dimension
tolerance for cubes +, – 2 mm. - Free fall
of concrete is allowed maximum to 1.50m. - Water
absorption of bricks should not be more than 15 % while shocked in fresh
water for 24 hrs. - PH value
of the water should not be less than 6. - Brick should give metallic sound while struck with
each other.. - In steel
reinforcement work, binding wire required is 8-10 kg per MT.
De-Shuttering time of RCC
member
member
|
RCC Member
|
De-shuttering
Age |
|
For columns,
walls, vertical form works |
16-24 hrs.
|
|
Soffit
formwork to slabs |
3 days (props
to be re-fixed after removal) |
|
Soffit to
beams props |
7 days (props
to re-fixed after removal) |
|
Beams
spanning up o 4.5m |
7 days
|
|
Beams
spanning over 4.5m |
14 days
|
|
Arches
spanning up to 6m |
14 days
|
|
Arches
spanning over 6m |
21 days
|
Cube
Sample required for the concrete
Sample required for the concrete
Size
of Cube = 150mm * 150mm
of Cube = 150mm * 150mm
|
Quantity of
Concrete |
No. of cubes
required |
|
1 – 5 m3
|
1 No’s
|
|
6 0 15 m3
|
2 No’s
|
|
16 – 30 m3
|
3 No’s
|
|
31 – 50 m3
|
4 No’s
|
|
Above 50 m3
|
4 + 1 No’s of
addition of each 50 m3 |
tags:
Civil Site Engineer’s Tips
Civil Site Engineer’s Tips – – Key Point to Remember for Fresher Civil Site Engineer