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1.1 This test method covers procedures for checking the homogeneity and integrity of concrete in a deep foundation such as bored piles, drilled shafts, concrete piles or augercast piles. This method can also be extended to diaphragm walls, barrettes, dams etc. The test measures the propagation time and relative energy of an ultrasonic pulse between parallel access ducts installed in the pile or structure. This method is most applicable when performed between tubes that are installed during pile construction.
1.2 Similar techniques with different excitation sources or single access ducts, or both, exist, but these techniques are outside the scope of this test method.
1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026.
1.3.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.
1.4 LimitationsProper installation of the access ducts is essential for effective testing and interpretation. The method does not give the exact type of defect (for example, inclusion, honeycombing, lack of cement particles, etc.) but rather only that a defect exists. The method is limited primarily to testing the concrete between the access ducts and thus gives little information about the concrete outside the reinforcement cage to which the access ducts are attached when the tubes are attached to the inside of the reinforcement cage.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1143 Test Method for Piles Under Static Axial Compressive Load
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
D4945 Test Method for High-Strain Dynamic Testing of Deep Foundations
D5882 Test Method for Low Strain Impact Integrity Testing of Deep Foundations
D6026 Practice for Using Significant Digits in Geotechnical Data
ICS Number Code 91.080.40 (Concrete structures)