AASHTO R39
Full Name
AASHTO R39 – Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory
Scope
AASHTO R39 is a standard practice that outlines the procedures for preparing and curing concrete test specimens under controlled laboratory conditions. This ensures that the test specimens accurately represent the concrete being used in construction projects and provide reliable results for assessing its properties and performance.
Key aspects of AASHTO R39:
- Scope: the standard covers the procedures for making and curing test specimens of concrete in the laboratory under controlled conditions. It applies to concrete used in various applications, including pavements, bridges, buildings, and other structures.
- Specimen types: AASHTO R39 specifies the dimensions, molds, and procedures for preparing various types of concrete test specimens, including cylinders, beams, prisms, and cubes. These specimens are used for testing compressive strength, flexural strength, splitting tensile strength, and other properties.
- Mixing and consolidation: the standard provides detailed instructions for mixing the concrete ingredients, placing the concrete in the molds, and consolidating it to remove air voids and ensure uniform density.
- Curing conditions: AASHTO R39 specifies the temperature and humidity conditions for curing the concrete specimens. The curing process allows the concrete to gain strength and develop its intended properties over time.
- Specimen handling and testing: the standard also outlines the procedures for handling, transporting, and preparing the cured specimens for testing.
Significance of AASHTO R39:
- Quality control: by following AASHTO R39, testing laboratories can ensure the quality and consistency of concrete test specimens. This is crucial for obtaining accurate and reliable test results that reflect the actual properties of the concrete used in the field.
- Standardization: the standard provides a standardized set of procedures for making and curing concrete test specimens, ensuring consistency and comparability of test results across different laboratories and projects.
- Research and development: AASHTO R39 also serves as a reference for research and development activities related to concrete materials and properties.
AASHTO R39 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the AASHTO R39 standard.
Our laboratory adheres to AASHTO R39 and other relevant standards to ensure the quality and accuracy of our concrete testing services. We use state-of-the-art equipment and techniques to prepare and cure concrete test specimens under controlled conditions, providing our clients with reliable and accurate data for their construction projects.
Contact us for more information.
Resources
Keywords
concrete; test specimen; curing; mold; consolidation; temperature; humidity; compressive strength; flexural strength; splitting tensile strength