AASHTO T148
Full Name
AASHTO T148 – Standard Method of Test for Measuring Length of Drilled Concrete Cores
Scope
AASHTO T148 is a standard test method used to determine the length of cores drilled from hardened concrete structures, such as pavements, slabs, or other structural elements. The primary purpose of this test is to assess the thickness of the concrete element, which is crucial for evaluating its structural integrity and compliance with design specifications.
Key aspects of AASHTO T 148:
- Principle: the test involves measuring the length of a drilled concrete core using a suitable measuring device, such as a caliper or a specialized core length measuring device. Multiple measurements are taken along the core’s circumference and length to account for any irregularities or variations in the core’s geometry.
- Procedure: the standard outlines a detailed procedure for measuring the core length, including the following steps:
- Cleaning and preparing the core.
- Positioning the core in the measuring device.
- Taking multiple measurements at specified locations along the core’s length and circumference.
- Averaging the measurements to obtain the final core length.
- Equipment: AASHTO T 148 specifies the requirements for the measuring device, which should have a resolution of at least 0.05 inches (1 mm) and be capable of measuring the core length accurately and consistently.
Significance of AASHTO T 148:
- Quality control: by measuring the length of drilled cores, engineers and contractors can verify the thickness of the concrete element and ensure that it meets the specified design requirements. This is important for ensuring the structural integrity and safety of the structure.
- Performance assessment: the core length data can be used to assess the overall quality of the concrete and identify any potential defects or variations in thickness that may affect its performance.
- Rehabilitation and repair: core length measurements are also useful in evaluating the effectiveness of concrete rehabilitation and repair techniques. By comparing the core lengths before and after the repair, engineers can assess the success of the repair and ensure that the repaired concrete meets the required thickness.
AASHTO T148 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the AASHTO T148 standard.
Our laboratory offers comprehensive concrete testing services, including the measurement of drilled concrete cores according to AASHTO T 148. Our experienced technicians utilize calibrated equipment and adhere to strict quality control procedures to ensure the accuracy and reliability of our test results.
Contact us for more information.
Resources
Keywords
concrete core; core length; drilled core; measuring device; caliper; measurement; thickness; concrete pavement