CONCRETE MIXING RATIOS
G15 means compressive strength of 15 N/mm2 @ MPa.
G20 means compressive strength of 20 N/mm2 @ MPa.
G25 means compressive strength of 25 N/mm2 @ MPa.
G30 means compressive strength of 30 N/mm2 @ MPa.
G40 means compressive strength of 40 N/mm2 @ MPa.
G50 means compressive strength of 50 N/mm2 @ MPa.

ASTM C 31 = Standard Practice for Making and Curing Concrete Test Specimens in the Field
ASTM C 39 = Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens

However, we can use the following ratios for small jobs.
ratio
cement, 50kg per bag
sand, m3
stone, m3
1 : 1.5 : 3
9.5
0.5
1.0
1 : 2 : 4
7.0
0.5
1.0
1 : 2.5 : 5
6.0
0.5
1.0
1 : 3 : 6
5.0
0.5
1.0


REBAR
Deformed Bar was previously called Y-Bar e.g., Y12, Y16, etc.,
but through product improvements the tempcore strength was increased (now 500Mpa),
and is now denoted as N-Bar e.g., N12, N16, N20, N24, N28, N32, N36, etc.
The diameter of N12 is 12 mm.

I BEAM



BUILDING
pile, pile cap

grade beam

footing, column, beam


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