Quality of Construction
* Quantity of water
Note :- Water should be free from silt, clay,soil, salt, acid etc.
Chloride maximum = 1 - 40%
Sulphate maximum = 1 - 50%
Salted water maximum = 1 - 50%
Ph - value maximum = 6.5 - 8.5
* Course Aggregate ( stone )
20 mm and 10 mm
if should be free from dust.
* D.P.C. ( Damp Proofing Course )
* Types of stone
(a) Marble
(b) Granite
(c) Kota stone
(d) Sand stone
(e) Lime stone
(f) Slate
* Types of steel
(a) Mild steel
It is fully round without any line and structure on the surface of steel.
(b) T M T steel
It has line on the steel surface. It is used in buildings.
* Ratio of concrete
M 20 = 1 : 1.5 : 3
* Use of water in concrete
With vibrator
25 ltr.( water ) / bags
Without vibrator
28 - 30 ltr.( water ) / bags
* During casting
Height of reinforcement should be 25 - 30 mm to the bottom level.
Ratio 1 : 1.5 : 3
1 = one bag cement
1.5 = 1.5 bag sand
3 = 3 bag aggregates
You have any dought, let me know.