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Refining the Simple Performance Tester for Use in Routine Practice (2008) / Chapter Skim
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Pages 16-26

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From page 16...
... The equipment specification developed in Phases I and II (10) was revised to specify a device capable of performing the three simple performance tests and developing dynamic modulus master curves using the abbreviated testing protocol developed during this phase of the project.
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From page 17...
... No manufacturer proposed an alternative to the standard glued gage point system with LVDTs for measuring specimen deformations in the dynamic modulus test. Version 2.0 of the specification allows alternatives to be considered provided the manufacturer can demonstrate that the alternative produces deformation measurements that are the same as the standard glued gage point system.
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From page 18...
... When these devices were purchased, it was envisioned that the SPT would be used only for fatigue and rutting evaluations at intermediate and high pavement temperatures. After the abbreviated dynamic modulus master curve testing procedure was developed, it became apparent that the SPT also could serve as equipment for the development of dynamic modulus master curves for pavement structural design.
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From page 19...
... 1. Replacement of the test chamber with an acrylic chamber that provided full view of the specimen, instrumentation, and loading platens.
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From page 20...
... The reaction posts are located in an awkward position, making installation of the instrumentation on the specimen for dynamic modulus testing difficult. The test cell heat exchangers and associated fans are mounted in the top of the test chamber.
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From page 21...
... Summary of specification compliance tests.
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From page 22...
... Incorrect computation of dynamic modulus data quality statistics. Modified software to correct computations.
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From page 23...
... IPC Global also made a modification to improve the holders for the LVDTs for the specimen mounted deformation measuring system used in the dynamic modulus test. The IPC Global SPT is relatively small.
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From page 24...
... User must develop a table of offsets. Confining pressure control did not function properly in the flow number and flow time tests.
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From page 25...
... Figure 20. Overall view of the IPC Global SPT.
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From page 26...
... Figure 24. IPC Global gluing apparatus and membrane stretcher
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Key Terms

  • time test
  • flow time
  • confining pressure
  • specimen deformation
  • dynamic modulus

  • loading platens
  • deformation measuring
  • testing chamber
  • test specimen
  • simple performance

  • performance test
  • data quality
  • environmental chamber
  • advanced asphalt
  • master curve

  • modulus test
  • modulus master
  • loading platen
  • test chamber
  • standard glued

  • test data
  • proposed equipment
  • highway research
  • compliance test
  • ipc global

  • global spt
  • specimen mounted
  • master curves
  • revised simple
  • modified software


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
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