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TxDOT – Standard and Criteria for Reinforcement Couplers TEXAS DEPARTMENT OF TRANSPORTATION AUTHORIZATION ACCEPTANCE CRITERIA FOR MECHANICAL COUPLERS FOR REINFORCING STEEL under DMS-4510   TEXAS DOT   Type of Test Required Why ! (Purpose of the test) What is the Criteria ? Static tensile strength test Tensile strength of the Rebar joint (Rebar to Coupler Splice) joint   >1.25Fy   Slip Test   Used to make sure that the plastic movement (slip) between the reinforcement bars with in the Mechanical Splice, when Loaded in tension   <=0.010 inch  after applying  0.5fy  loading   Fatigue Loading Low Cycle Fatigue Test   The purpose of this test is to evaluate the performance of the splice reinforcement following significant  inelastic stress reversal fati...

Coupler testing Specification, Criteria and Standards as per BS 8110 British Code - BS 8110  - Structural use of concrete BS 8110 Type of Test Required Why ! (purpose of the test) What is the Criteria ? Static tensile strength test Tensile strength of the Rebar joint (Rebar to Coupler Splice) joint   > 1.15fy & Bar break (100%fu)   Slip Test   Used to make sure that the plastic movement (slip) between the reinforcement bars with in the Mechanical Splice, when Loaded in tension <=0.10mm  after applying  0.6fy  loading   Maximum % Elongation     0.1 mm after applying 0.6 fy loading   BS 8110 British Code has lower acceptance criteria as compared to the ACI code,  It specifies tensile testing and slip test for the joint for acceptance of the sample.

CALTRANS – Standard and Criteria for Reinforcement Coupler CALIFORNIA DEPARTMENT OF TRANSPORTATION AUTHORIZATION ACCEPTANCE CRITERIA FOR MECHANICAL COUPLERS ON ASTM A706 and ASTM A615 REINFORCING STEEL   CALTRANS   Type of Test Required Why ! (Purpose of the test) What is the Criteria ? Static tensile strength test Tensile strength of the Rebar joint (Rebar to Coupler Splice) joint   >1.25Fy   Slip Test   Used to make sure that the plastic movement (slip) between the reinforcement bars with in the Mechanical Splice, when Loaded in tension   <=0.010 inch after applying 0.5fy loading   Uniform Cyclic Load Test (Seismic Elastic)   Used to make sure how a mechanical splice performs when subjected to alternating tension and compression loads for a given number of cycles. ...

ISO 15835–1:2018 - Standard - Steel for the reinforcement of concrete – Reinforcement couplers for mechanical splices of bars ISO 15835 & NF 350-20   IS O 15835 & NF 350-20   Type of Test Required Why ! (Purpose of the test) What is the Criteria ? Static tensile strength test Tensile strength of the Rebar joint (Rebar to Coupler Splice) joint   >ReH(Rm/ReH) ReH - Refers to beginning of yield point elongation Rm - Tensile Strength     Slip Test   Used to make sure that the plastic movement (slip) between the reinforcement bars with in the Mechanical Splice, when Loaded in tension   <=0.10 mm after applying A minimal force of 0.7ReH (=bar’s nominal yield stress) is used to measure slip at the splice ReH - Refers to beginning of yield point elongation   Uniform Cyclic Load Test ...

American Concrete Institute (ACI) Building Code 318 - Building code Requirements for Structural Concrete and Commentary ACI 318 / ACI 133 A CI 318 / ACI 133 Type of Test Required Why ! (purpose of the test) What is the Criteria ? Static tensile strength test Tensile strength of the Rebar joint (Rebar to Coupler Splice) joint   > 1.25fy for Type 1 100% fu & >1.25fy for Type 2   Fu = Ultimate Strength of bar Fy = Yield Strength of bar   Slip Test   Used to make sure that the plastic movement (slip) between the reinforcement bars with in the Mechanical Splice, when Loaded in tension   The bar-splice assembly shall be loaded in tension to nominal zero load, not exceeding 4Mpa (600 psi).   The bar-splice assembly then be loaded in tension with a loading rate between 70 Mpa/min to 690 Mpa/min.   ...