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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Tools > Frequently Asked Questions
Q. Are aggregates classified according to density? A. Yes. Those used to make normal-density concrete are called normal-density aggregates. Those for low-density concrete (historically known as “lightweight” concrete) that have an air-dried density at 28 days usually in the range of 1440 to 1850 kg/m3 (90 to 115 lb/ft3), are called low-density aggregates. Those for high-density concrete, ranging in density from about 2880 to 5600 kg/m3 (180 to 350 lb/ft3), are called high-density aggregates (ACI 221R, ACI 213R). References: SP-1(02); ACI E-1(16); ACI 221R-96; ACI 213R-14; ASTM C33 Topics in Concrete: Aggregate; Concrete Fundamentals; Materials; Lightweight
Q. Are aggregates classified according to density?
A. Yes. Those used to make normal-density concrete are called normal-density aggregates. Those for low-density concrete (historically known as “lightweight” concrete) that have an air-dried density at 28 days usually in the range of 1440 to 1850 kg/m3 (90 to 115 lb/ft3), are called low-density aggregates. Those for high-density concrete, ranging in density from about 2880 to 5600 kg/m3 (180 to 350 lb/ft3), are called high-density aggregates (ACI 221R, ACI 213R).
References: SP-1(02); ACI E-1(16); ACI 221R-96; ACI 213R-14; ASTM C33
Topics in Concrete: Aggregate; Concrete Fundamentals; Materials; Lightweight
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