Pile Integrity Testing

Pile Integrity Testing

ACS offer an On-Site Pile Integrity Testing service using Piletest’s Pile Echo Tester (PET). The Pile Echo Tester uses the Pulse-Echo method (PEM) for quick Pile Integrity Test (quality control). The PET is fully compliant to ASTM D5882-07 (2013) Standard Test Method fo Low Strain Impact Integrity Testing od Deep Foundations for Pile Integrity Testing as well as additional standards.


The Test is conducted by placing a transducer on the pile head surface and the pile is then tapped with a lightweight plastic hammer. The resulting signal, or reflectogram, is captured and transferred to a computer by PET’s digital accelerometer, providing real-time information about the length and shape of the pile.

In order to obtain the highest quality of recovered reflectogram, the piles under test should satisfy the following conditions;

  • The concrete should be tested no sooner than 7 days after casting. Or after concrete strength achieves at least 75% of its design strength, whichever occurs earlier.
  • The pile head should be cleaned, accessible and free from debris.
  • The top of the pile should consist of original, solid intact concrete.
  • The pile cap or ground beam reinforcement must not be in place.


Since the sonic method is based on the use of stress waves, it can identify only those pile attributes that influence wave propagation. The following items may in many cases be detected;

  • Pile length.
  • Cracking and perpendicular to the axis.
  • Joints and staged concreting.
  • Changes in cross section.
  • Distinct changes in soil layers.


The first step in analyzing the reflectogram is carried out on site immediately following each test. This is completed by comparing the refletogram to a mental picture of various pile shapes and their respective readings. Anomalous readings that are readily identifiable, are noted on site and the recorded data may be subject to further analysis in the computer software to quantify better the extent of an apparent anomaly. If after data processing there is still doubt over the pile quality, further investigation and remedial measures may be required.

All works have the support of laboratories and resources within the ACS Group of Companies which allows for seamless project progression and completion.

Please see below for a list of the services provided by ACS;

  • On-Site Testing Services

    ACS Testing offer a comprehensive range of professional On-Site Testing, all carried out by our fully trained Site Technicians

  • Aggregates & Soils Testing

    From our main Laboratory in Poole, Dorset, ACS Group of Companies provide quality testing and material consultancy for the construction and civil engineering industry.

  • Bituminous Testing

    Bituminous road surfacing materials are produced by mixing mineral aggregate with a bitumen binder in predetermined quantities and within defined temperature ranges.

  • Concrete Testing

    Concrete was the first service to be offered by ACS Testing back in 1987, since then we have increased our scope to cover a wide range of UKAS Accredited testing on fresh and hardened concrete, both on site and in our laboratories.

  • Mortar & Screed Testing

    Mortar has played a major role in construction since ancient times with the oldest example having been found in Israel and thought to date back 10,000 years.

  • Contamination & WAC Testing

    At ACS Environmental Testing we offer an efficient and reliable analysis service using various test leaching procedures specified by the Environment Agency.

  • Chemical Testing

    ACS Environmental Ltd was established in 2007 to complement the physical materials testing service provided by ACS Testing Ltd to offer a range of analytical services to clients in order to meet their overall needs.

  • Leachate & Water Analysis

    Our purpose built analytical laboratory enables ACS Environmental Testing Ltd to provide, in conjunction with our other group companies, a comprehensive sampling, monitoring and analysis service on a wide range of leachate and water samples.

  • Natural Stone Testing

    Our newly refurbished Stone Testing Laboratory has given us the opportunity to expand our testing scope as well as increase production and better improve on our turnaround of samples.

  • Site Laboratory Service

    Over the last twenty-five years, ACS Testing Ltd have supplied custom fitted Site Laboratories with Technicians to many construction sites and projects worldwide.