The Influence of Concrete Age on the Accuracy of Pile Integrity Testing on Bored Piles Foundation

Bored pile foundations are defined as deep foundations in the form of an elongated tube with a specific diameter made of reinforced concrete installed using the drilling method and in-situ casting concrete. The cast in-situ process in bored holes with a deep elevation below the ground surface can po...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2024-07, Vol.1373 (1), p.12045
Main Authors: Santoso, H.T., Hartono, J., Andani, R., Primaswari, G.
Format: Article
Language:English
Subjects:
Accuracy
Age
Bored piles
Boring
Casting defects
Chronology
Compressive strength
concrete age
Concrete construction
Concrete properties
Deep foundations
Design
Drilling
Integrity
Matrix methods
Necking
Nondestructive testing
Pile foundations
pile integrity
Pile tests
Piles
PIT
Reinforced concrete
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Summary:Bored pile foundations are defined as deep foundations in the form of an elongated tube with a specific diameter made of reinforced concrete installed using the drilling method and in-situ casting concrete. The cast in-situ process in bored holes with a deep elevation below the ground surface can potentially cause integrity problems, such as voids, segregation, fracture, necking, bulging, and other concrete defects. Currently, many non-destructive test methods are available to ensure the quality of the bored pile; one is the Low Strain Integrity Testing method, also known as Pile Integrity Testing (PIT). ASTM recommends that PIT should be carried out no sooner than 7 days after casting or the strength of the concrete has reached a minimum of 75,0% of its design strength. In fact, the PIT test is carried out before the concrete’s age and/or its strength is achieved, considering the limited construction time. This could lead to misinterpretation of the PIT test results and inaccurate identification of the bored pile defect locations. The study aims to determine the effect of concrete age on the accuracy of bored pile defect locations on a laboratory scale. The test model consisted of four bored piles with a diameter of 0,3 meters and a depth of 2,0 meters, which were cast using reinforced concrete with a design strength of fc’ 30 MPa. The PIT was performed at 75,0% of the design accurately identify defect locations above 84,21%. On the other hand, bored piles with concrete strength
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/1373/1/012045