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Astm D6760 02 Pdf 16



Astm D6760 02 Pdf 16: A Standard Test Method for Concrete Deep Foundations Integrity Testing




Concrete deep foundations are essential for the stability and safety of many structures, such as bridges, dams, buildings, and towers. However, concrete deep foundations can also suffer from defects or flaws that can compromise their quality and performance. Therefore, it is important to check the homogeneity and integrity of concrete deep foundations using reliable and accurate methods.




Astm D6760 02 Pdf 16



One of the methods that can be used for this purpose is Astm D6760 02 Pdf 16, a standard test method for integrity testing of concrete deep foundations by ultrasonic crosshole testing. This method uses data from ultrasonic probes lowered into parallel access ducts or in a single access duct in the deep foundation element to assess the homogeneity and integrity of concrete between the probes. The data are used to confirm adequate concrete quality or identify zones of poor quality.


In this article, we will review the features, benefits, and limitations of Astm D6760 02 Pdf 16 and how to use it effectively. We will also provide some tips and tricks for using Astm D6760 02 Pdf 16 and some alternatives to this method.


What is Astm D6760 02 Pdf 16?




Astm D6760 02 Pdf 16 is a standard test method for integrity testing of concrete deep foundations by ultrasonic crosshole testing. It was developed by ASTM International, an organization that develops and publishes voluntary consensus technical standards for various materials, products, systems, and services.


Astm D6760 02 Pdf 16 covers procedures for checking the homogeneity and integrity of concrete in deep foundation such as bored piles, drilled shafts, concrete piles or augercast piles. This method can also be extended to diaphragm walls, barrettes, dams etc. In this test method, all the above will be designated "deep foundation elements."


The test measures the propagation time and relative energy of an ultrasonic pulse between parallel access ducts (crosshole) or in a single tube (single hole) installed in the deep foundation element. This method is most applicable when performed in tubes that are installed during construction.


Similar techniques with different excitation sources exist, but these techniques are outside the scope of this test method.


What are the benefits of Astm D6760 02 Pdf 16?




There are many benefits of using Astm D6760 02 Pdf 16 to check the homogeneity and integrity of concrete deep foundations. Some of them are:


  • It is a non-destructive test that does not damage or alter the concrete deep foundation element.



  • It is a fast and efficient test that can be performed in a short time and with minimal equipment and personnel.



  • It is a sensitive and accurate test that can detect small defects or flaws in the concrete deep foundation element.



  • It is a versatile test that can be applied to various types of concrete deep foundation elements and geometries.



  • It is a reliable test that can provide consistent and repeatable results.



What are the limitations of Astm D6760 02 Pdf 16?




While Astm D6760 02 Pdf 16 has many advantages, it also has some limitations that should be considered. Some of them are:


  • It requires proper installation of the access ducts for effective testing and interpretation. The access ducts should preferably be made of steel to prevent debonding of the access duct from the concrete resulting in an anomaly. For single hole tests, the access tubes must be plastic tubes. Testing should therefore be performed as soon as practical in order to avoid debonding issues.



  • It can only assess the integrity of the concrete mainly in the area bounded by the access ducts, which means typically inside the reinforcement cage. It cannot detect defects or flaws outside this area or near the surface of the concrete deep foundation element.



  • It does not give the exact type of flaw (for example, inclusion, honeycombing, lack of cement particles, etc.) but rather only that a flaw exists. If defects are detected, then further investigations should be made by excavation or coring the concrete as appropriate, or by other testing methods such as Test Method D1143/D1143M (Standard Test Methods for Deep Foundations Under Static Axial Compressive Load), D4945 (Standard Test Method for High-Strain Dynamic Testing of Deep Foundations), or D5882 (Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations), and measures taken to remediate the structure if a defect is confirmed.



How to use Astm D6760 02 Pdf 16?