- AA-The Aluminum Association
- AAMI-Association for the Advancement of Medical Instrumentation
- AASHTO-American Association of State Highway and Transportation Officials
- AATCC-American Association of Textile Chemists and Colorists
- ACI-American Concrete Institute
- ANSI-American National Standards Institute
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ACI-American Concrete Institute
American Concrete Institute (ACI) Standards
The American Concrete Institute (ACI) is a globally recognized authority in concrete technology, providing industry-leading standards, technical publications, engineering resources, and professional education programs. ACI develops and publishes consensus-based standards and guidelines that support the design, construction, testing, inspection, and maintenance of concrete structures.
ACI standards and technical publications cover a wide range of concrete engineering topics, including concrete testing methods, structural design, inspection procedures, cracking and failure analysis, construction practices, material specifications, and building code requirements. With more than 400 technical standards, reports, and manuals, ACI provides valuable guidance for engineers, architects, contractors, researchers, and construction professionals worldwide.
Through its technical resources, training, and certification programs, ACI promotes innovation, quality, safety, and best practices throughout the concrete and construction industries.
At e-Standards Portal, you can explore ACI standards, concrete engineering specifications, technical reports, and industry publications to support your construction projects, structural engineering work, material testing, and quality assurance requirements.
ACI PRC-555-2026 PDF
This guide presents information on the use of recycled concrete aggregate (RCA) in portland cement c..


