AASHTO M157
Full Name
AASHTO M157 – Standard Specification for Ready-Mixed Concrete
Scope
AASHTO M157 is a standard specification that outlines the requirements for the production, delivery, and acceptance of ready-mixed concrete used in construction projects. Ready-mixed concrete is a pre-mixed blend of cement, aggregates, water, and often admixtures, which is manufactured in a central plant and transported to the construction site in a fresh and unhardened state.
Key aspects of AASHTO M157:
- Scope: the specification covers the materials, proportions, production, delivery, acceptance, and testing of ready-mixed concrete. It also addresses issues such as batching tolerances, temperature control, and delivery time.
- Materials: AASHTO M157 specifies the requirements for cement, aggregates, water, and admixtures used in ready-mixed concrete. The materials must meet specific quality standards to ensure the desired properties of the concrete.
- Mix design: the specification outlines the requirements for mix design, which involves determining the proportions of ingredients to achieve the desired strength, workability, and durability of the concrete.
- Production and delivery: the standard specifies the requirements for the production and delivery of ready-mixed concrete, including mixing, transportation, and placement at the job site.
- Acceptance and testing: AASHTO M157 defines the procedures for testing and acceptance of ready-mixed concrete, including tests for slump, air content, compressive strength, and other properties.
Significance of AASHTO M157:
- Quality assurance: by adhering to AASHTO M157, concrete producers can ensure the quality and consistency of their ready-mixed concrete. This is crucial for ensuring the structural integrity and durability of the concrete structures.
- Uniformity: the standard provides a uniform set of requirements for ready-mixed concrete, facilitating fair competition among producers and ensuring consistent quality across different projects and regions.
- Specification: AASHTO M157 serves as a reference document for specifying the requirements for ready-mixed concrete in construction contracts and project specifications.
AASHTO M157 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the AASHTO M157 standard.
Our laboratory offers comprehensive testing services for ready-mixed concrete based on AASHTO M157 and other relevant standards. Our experienced technicians conduct a wide range of tests to evaluate the properties and performance of your concrete, ensuring that it meets the specified requirements and quality standards.
Contact us for more information.
Resources
Keywords
ready-mixed concrete; concrete; admixture; slump; air content; compressive strength; aggregate; cement; water; mix design; delivery; acceptance; testing