ASTM C172
Full Name
ASTM C172 – Standard Practice for Sampling Freshly Mixed Concrete
Scope
ASTM C172 outlines the procedures for obtaining representative samples of freshly mixed concrete at the project site. These samples are then used to perform tests that determine if the concrete meets the quality requirements specified in the project contract.
The standard covers:
- Sampling locations: it provides instructions for sampling concrete from various sources, including stationary mixers, paving mixers, truck mixers, agitating and non-agitating equipment, and continuous mixing equipment.
- Sampling techniques: it details the methods for obtaining samples, such as passing a container through the discharge stream or diverting the stream into a container.
- Composite samples: it outlines how to create composite samples from multiple portions taken during the discharge of concrete.
- Time limitations: it specifies the maximum time allowed between taking the first and final portions of the composite sample.
- Sample size: it recommends a minimum sample size for specific tests, such as strength tests.
The standard does not cover specific test methods: the details regarding the materials, mixtures, air content, temperature, number of specimens, slump, interpretation of results, and precision and bias are outlined in specific test methods, not in ASTM C172.
ASTM C172 is essential for ensuring the quality and consistency of concrete used in construction projects. By providing standardized sampling procedures, it helps to guarantee that the concrete tested accurately represents the concrete being used in the project.
ASTM C172 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C172 standard.
Contact us today to discuss your specific testing needs and how our services can help you make informed decisions.
Resources
Keywords
sampling; concrete; composite sample; discharge stream; receptacle; sample container; segregation