Tensile strength Test of Rebar Coupler
The tensile strength test of rebar coupler carried out in accordance with IS 1608. A tensile test on an un-spliced specimen from the same bar used for the preparation of spliced specimen shall be performed to establish the actual tensile strength of the reinforcing bar. For the calculation of stresses, the effective cross-sectional area of the reinforcing bar shall be used.
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| Tensile strength Test of Rebar Coupler | Coupler testing Standards |
Percentage Elongation at Maximum Force
The gauge length for determining percentage elongation at maximum force for both spliced and unspliced specimens shall be the same. In both spliced and un-spliced specimen, it shall be located outside the length of the mechanical splice in both the bars.
The percentage elongation at maximum force shall be tested and measured according to IS 1608 outside the length of the mechanical splice on both sides of the connection. Both values shall be recorded and the largest shall be used to assess conformity.
Test Result:
Each individual test report on both the spliced and unspliced specimens shall include at least the following information:
a) Tensile strength,
b) Total percentage elongation at maximum force,
c) Load-extension curve to the smaller of 2 percent strain or the strain at a specified tensile strength of the reinforcing bar, and
d) Location of failure, that is within the mechanical splice length or outside the mechanical splice length
The location of failure shall be deemed to be in the bar, if it is outside the length of the mechanical splice. Where a requirement of bar break is specified by the purchaser/user, a failure located inside the length of the mechanical splice shall be recorded
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