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ultimate tensile strength of the control bar associated with the sample splice. In addition, necking of the bar, as defined in
<br /> California Test 670,shall be evident at rupture regardless of whether the bar breaks inside or outside the affected zone.
<br /> • The affected zone is the portion of the reinforcing bar where any properties of the bar, including the physical,
<br /> metallurgical,or material characteristics,have been altered by fabrication or installation of the splice.
<br /> • The ultimate tensile strength shall be determined for all control bars by tensile testing the bars to rupture,regardless
<br /> of where each sample splice ruptures. If 2 control bars are tested for one sample splice, the bar with the lower ultimate
<br /> tensile strength shall be considered the control bar.
<br /> 52-1.08C(3)(a) Production Test Requirements for Ultimate Butt Splices
<br /> • Production tests shall be performed for all ultimate butt splices used in the work. A production test shall consist of
<br /> testing 4 sets of sample splices and control bars removed from each lot of completed splices, except when quality assurance
<br /> tests are performed.
<br /> • After the splices in a lot have been completed, and the bars have been epoxy-coated when required,the QCM shall
<br /> notify the Engineer in writing that the splices in this lot conform to the specifications and are ready for testing. Except for
<br /> hoops, sample splices will be selected by the Engineer at the job site. Sample splices for hoops will be selected by the
<br /> Engineer either at the job site or a fabrication facility.
<br /> • After notification has been received,the Engineer will randomly select the 4 sample splices to be removed from the
<br /> lot and place tamper-proof markings or seals on them. The Contractor shall select the adjacent control bar for each sample
<br /> splice bar, and the Engineer will place tamper-proof markings or seals on them. These ultimate production sample splices
<br /> and control bars shall be removed by the Contractor,and tested by an independent qualified testing laboratory.
<br /> • At least one week before testing, the Contractor shall notify the Engineer in writing of the date when and the
<br /> location where the testing of the samples will be performed.
<br /> • A sample splice or control bar from any set will be rejected if a tamper-proof marking or seal is disturbed before
<br /> testing.
<br /> • The 4 sets from each production test shall be securely bundled together and identified with a completed sample
<br /> identification card before shipment to the independent laboratory. The card will be furnished by the Engineer. Bundles of
<br /> samples containing fewer than 4 sets of splices shall not be tested.
<br /> • Before performing any tensile tests on production test sample splices,one of the 4 sample splices shall be tested for,
<br /> and shall conform to, the requirements for total slip. Should this sample splice not meet these requirements, one retest, in
<br /> which the 3 remaining sample splices are tested for total slip,will be allowed. Should any of the 3 remaining sample splices
<br /> not conform to these requirements,all splices in the lot represented by this production test will be rejected.
<br /> • If 3 or more sample splices from a production test conform to the provisions in Section 52-1.08C(3),"Ultimate Butt
<br /> Splice Test Criteria,"all splices in the lot represented by this production test will be considered acceptable.
<br /> • Should only 2 sample splices from a production test conform to the provisions in Section 52-1.08C(3), "Ultimate
<br /> Butt Splice Test Criteria," one additional production test shall be performed on the same lot of splices. Should any of the
<br /> 4 sample splices from this additional test fail to conform to these provisions, all splices in the lot represented by these
<br /> production tests will be rejected.
<br /> • If only one sample splice from a production test conforms to the provisions in Section 52-1.08C(3), "Ultimate Butt
<br /> Splice Test Criteria,"all splices in the lot represented by this production test will be rejected.
<br /> • If a production test for a lot fails, the Contractor shall repair or replace all reinforcing bars from which sample
<br /> splices were removed,complete in place,before the Engineer selects additional splices from this lot for further testing.
<br /> • Production tests will not be required on repaired splices from a lot, regardless of the type of prequalified ultimate
<br /> mechanical butt splice used to make the repair. However,should an additional production test be required,the Engineer may
<br /> select any repaired splice for the additional production test.
<br /> 52-1.08C(3)(b) Quality Assurance Test Requirements for Ultimate Butt Splices
<br /> • For the first production test performed, and for at least one, randomly selected by the Engineer, of every
<br /> 5 subsequent production tests, or portion thereof, the Contractor shall concurrently prepare 4 ad4itional ultimate quality
<br /> assurance sample splices along with associated control bars.
<br /> • Each time 4 additional ultimate quality assurance sample splices are prepared, 2 of these quality assurance sample
<br /> splice and associated control bar sets and 2 of the production sample splice and associated control bar sets, together, shall
<br /> conform to the requirements for ultimate production sample splices in Section 52-1.08C(3)(a),"Production Test Requirements
<br /> for Ultimate Butt Splices."
<br /> • The 2 remaining quality assurance sample splice and associated control bar sets, along with the 2 remaining
<br /> production sample splice and associated control bar sets shall be shipped to the Transportation Laboratory for quality
<br /> assurance testing. The 4 sets shall be securely bundled together and identified by location and contract number with
<br /> weatherproof markings before shipment. Bundles containing fewer than 4 sets will not be tested.
<br /> • Quality assurance testing will be performed in conformance with the requirements for ultimate production sample
<br /> splices in Section 52-1.08C(3)(a), "Production Test Requirements for Ultimate Butt Splices."
<br /> Contract No. 10-OM7104
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