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The American Concrete Institute (ACI, formerly National Association of Cement Users or NACU) is a non-profit technical society and standards developing organization. ACI was founded in January 1905 during a convention in Indianapolis. [1] [2] The Institute's headquarters are currently located in Farmington Hills, Michigan, USA. ACI's mission is ...
BSI – British Standards Institution aka BSI Group; DStan – UK Defence Standardization; United States of America. ANSI – American National Standards Institute; ACI – American Concrete Institute; NISO – National Information Standards Organization; NIST – National Institute of Standards and Technology
Portland Cement Association is a non-profit organization that promotes the use of cement and concrete.The organization conducts and sponsors research, [2] participates in setting cement manufacturing standards, [3] [4] and disseminates free designs of concrete-based architectural structures, [5] among other functions.
The American National Standards Institute (ANSI / ˈ æ n s i / AN-see) is a private nonprofit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. [3]
The elastic modulus of the hardened paste may be in the order of 10-30 GPa and aggregates about 45 to 85 GPa. The concrete composite is then in the range of 30 to 50 GPa. The American Concrete Institute allows the modulus of elasticity to be calculated using the following equation: [5]
Whittaker has been engaged in the development of codes, standards and guidelines in the United States since the late 1980s, including the National Earthquake Hazards Reduction Program Recommended Provisions, the American Society of Civil Engineers/Structural Engineering Institute (ASCE/SEI) Standards 4, 7, 41, 43, and 59, and American Concrete Institute (ACI) Code 349.
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Once this is defined, design code gives standard prescriptions for w/c ratio, the cement content, and the thickness of the concrete cover. This approach represents an improvement step for the durability design of reinforced concrete structures, it is suitable for the design of ordinary structures designed with traditional materials (Portland ...