ASTM WK34326

    New Test Method for Integrity Testing of Concrete Deep Foundations by Thermal Profiling

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    Developed by Subcommittee: D18.11 | Committee D18 | Contact Staff Manager



    WK34326

    1. Scope

    1.1 This test method covers procedures for assessing the integrity of concrete in cast-in-place deep foundation elements such as bored piles, drilled shafts, or augered piles. This test method can also be extended to diaphragm walls, barrettes, dams, and so forth. In this test method, all the above will be designated deep foundation elements. The test method measures the temperature of the concrete resulting from heat of hydration and uses this information to evaluate the entire concrete volume (for example, concrete both inside and outside the reinforcing cage). 1.2 Two alternative procedures are provided: 1.2.1 Procedure A uses probes in access ducts installed in the deep foundation element during construction. 1.2.2 Procedure B uses wires containing multiple thermal sensors attached to the reinforcing cage installed in the deep foundation element during construction. 1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026. 1.4 This test method provides minimum requirements for thermal testing of concrete deep foundation elements. Plans, specifications, and/or provisions prepared by a qualified engineer, and approved by the agency requiring the test, may provide additional requirements and procedures as needed to satisfy the objectives of a particular test program. 1.5 The text of this test method references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. The word shall indicates a mandatory provision and the word should indicates a recommended provision. Imperative sentences indicate mandatory provisions. 1.6 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.7 The method used to specify how data are collected and recorded in this test method is not directly related to the accuracy to which the data can be applied in the design. How one uses the results obtained using this standard is beyond its scope. 1.8 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 1.9 Limitations-Proper installation of the access ducts is essential for effective testing and interpretation. The test method does not give the exact type of defect (for example, inclusion, honeycombing, lack of cement particles, and so forth) but rather only that a defect exists. The test method is limited primarily to testing the concrete during the early curing process. 1.10 This test method may involve hazardous materials, operations, and equipment. 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.

    No current standard exists for this method. It will be adopted by government agencies and consulting engineers as a method to assure quality for cast-in-place foundations.


    Keywords

    barrette; bored pile; thermal testing; drilled shaft; integrity test; concrete curing; heat of hydration

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:
    08-03-2011

    Technical Contact:
    Garland Likins

    Item:
    022

    Ballot:
    D18 (14-03)

    Status:
    In Balloting