ASTM D7949-14
Standard Test Methods for Thermal Integrity Profiling of Concrete Deep Foundations

Standard No.

ASTM D7949-14

Release Date

2014

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7949-14

Scope

5.1 Temperature measurements taken from a thermal probe lowered into access ducts in the deep foundation element, or from embedded thermal sensors distributed along the length, can be used to assess the homogeneity and integrity of concrete both inside and outside the reinforcing cage, as well as placement of the cage relative to the center of the curing concrete.3, 4

Note 4: If flaws are detected, then further evaluation and potential remediation may be warranted to determine if the flaw is a defect. Any interpretation is qualitative and possibly relative to the particular deep foundation element material, construction characteristics of the tested structure, and the apparatus used. Interpretation therefore should contain proper engineering judgment and experience.

1.1 These test methods provide procedures for measuring the temperature profile within a deep foundation element constructed using cast-in-place concrete, such as bored piles, drilled shafts, augered piles, diaphragm walls, barrettes, and dams, and alike. The thermal profile induced by the curing concrete can be used to evaluate the homogeneity and integrity of the concrete mass within the deep foundation element.

1.2 Two alternative procedures are provided:

1.2.1 Method A uses a thermal probe lowered into access ducts installed in the deep foundation element during construction.

1.2.2 Method B uses multiple embedded 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values shall conform to the guidelines for significant digits and rounding established in Practice D6026, unless superseded by this standard.

1.3.1 The procedures used to specify how data are collected/recorded and calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that should generally be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.

1.4 This standard provides minimum requirements for thermal profiling 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 ......

ASTM D7949-14 Referenced Document

• ASTM D3740 Standard Practice for Minimum Requirements for Agencies Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• ASTM D6026 Standard Practice for Using Significant Digits in Geotechnical Data
• ASTM D653 Standard Terminology Relating to Soil, Rock, and Contained Fluids

ASTM D7949-14 history

• 2014 ASTM D7949-14 Standard Test Methods for Thermal Integrity Profiling of Concrete Deep Foundations