ASTM D7949-14 PDF Download

ASTM D7949-14 standard provides procedures for measuring the temperature profile within deep foundation elements constructed using cast-in-place concrete. These elements can include bored piles, drilled shafts, augered piles, diaphragm walls, barrettes, and dams. The temperature profile induced by the curing concrete can be used to evaluate the homogeneity and integrity of the concrete mass within the deep foundation element.

The standard provides two alternative procedures for conducting the measurements. Method A involves using a thermal probe that is lowered into access ducts installed in the deep foundation element during construction. Method B uses multiple embedded thermal sensors attached to the reinforcing cage that is installed in the deep foundation element during construction.

The standard specifies that any flaws detected during the test may indicate a defect in the deep foundation element and may require further evaluation and potential remediation. The interpretation of the temperature profile data should be done with proper engineering judgment and experience, taking into consideration the specific material and construction characteristics of the tested structure.

The standard also provides guidelines for significant digits and rounding in the observed and calculated values, as well as limitations and considerations for installation of the access ducts or thermal sensors. It should be noted that the standard does not consider significant digits used in analysis methods for engineering design. Additional requirements and procedures may be specified by qualified engineers in the plans, specifications, and provisions of a particular test program.