Thermal Integrity Profiling (TIP) Testing per ASTM 7949, Standard Test Methods for Thermal Integrity Profiling of Concrete Deep Foundations, is an automated, non-destructive test method for assessing the integrity of deep foundation elements constructed on-site from concrete or grout such as drilled shafts or auger cast piles.FTG was one of the first consulting firms to utilize TIP Testing as an alternate method of deep foundation integrity testing.
Used either stand alone or in combination with CSL testing, TIP testing utilizes wires with thermistors on 1 ft intervals to determine the temperature gradient within the foundation element. The testing method uses temperature buildup measurements of the curing concrete, to identify necking, bulging, cage eccentricities, pile shape, and variations in concrete cover. TIP can be utilized to access the initial curing of the concrete foundation to determine the potential for presence of defective zones early in the post installation process. The lower temperature zones can be related to decreased concrete cover or no cover (void or washed out zone). By utilizing the volumetric placement of concrete in the shaft, the TIP data can give an indication as to the presence of bulges in the concrete, zones of leaning cages or of insufficient concrete cover.
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During the analysis and reporting phase FTG leads from the front, rather than just noting the presence of an anomaly or defect, we seek to determine how it occurred, how to prevent its reoccurrence and how to solve the foundation issues caused by its creation. FTG can guide on a process for shaft approval or remedial design based on the test results utilizing our experience record in deep foundation design and testing.
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Thermal Integrity Profiling in the field
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Jeff Goodwin, 410.517.0715
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