Various tests conducted for Rebar
In rebar pieces, the following items are generally found :-
X stands for diameter of rebar in mm as for instance 20.
ABCD stands for brand of rebar ranging from TATA TISCON, SAIL, JSPL etc.
Y stands for yield stress of rebar as for example 500 signifies Fe500 having yield stress similar to 500 Mpa
Chemical composition test
LSA or ladle sample analysis is performed in LD and details are noted.
TPA or test piece analysis is performed at chemical lab.
The chemical composition analysis should be adhered to Amend 1 of Cl. 4.2 of IS 1786-2008
Main physical property tests for a specific rebar are provided below :
1. Tensile test : Numbers of rebar sample =4, length of rebar sample =about 600 mm
2. Bend test : Numbers of rebar sample =4, length of rebar sample =about 500 mm
3. Rebend test : Numbers of rebar sample =4, length of rebar sample =about 500 mm
Individual Sample: In order to work out the nominal mass of an individual sample, ascertain the mass of any individual sample selected arbitrarily as mentioned in 11.1 and divide the same with the actual length of the sample. The length of the sample should not be under 0. 5m
Batch: The nominal mass of a batch is computed from the mass of the test specimens selected as mentioned in 11.1 and divide it with the genuine total length of the specimens. The length of each specimen should not be under 0.5 m
Existing Inputs :
1. Length of sample = L
2. Weight of sample = w
A = w/0.00785L mm2
[According to Cl. 6.3.1 of IS 1786-2008 given at right]
Gauge length for a rebar of dia D mm = 5D mm
The rebar sample is marked at (5D/2) mm locations.
To get more clear information, go through the following article engineeringcivil.com