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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. What is a natural pozzolan? A. A natural pozzolan is a raw or calcined pozzolan that is found in natural deposits. A material is referred to as “calcined” when it has been heated below the temperature of fusion to alter its composition or physical state. A raw pozzolan is a natural material that has pozzolanic properties, such as volcanic tuffs or pumicites, opaline cherts and shales, clays, and diatomaceous earths. References: SP-1(02); E3-13; SP-221; ACI 232.1R-12; Supplementary Cementing Materials in Concrete Topics in Concrete: Pozzolan; Cementitious Material; Materials; Concrete Fundamentals
Q. What is a natural pozzolan?
A. A natural pozzolan is a raw or calcined pozzolan that is found in natural deposits. A material is referred to as “calcined” when it has been heated below the temperature of fusion to alter its composition or physical state. A raw pozzolan is a natural material that has pozzolanic properties, such as volcanic tuffs or pumicites, opaline cherts and shales, clays, and diatomaceous earths.
References: SP-1(02); E3-13; SP-221; ACI 232.1R-12; Supplementary Cementing Materials in Concrete
Topics in Concrete: Pozzolan; Cementitious Material; Materials; Concrete Fundamentals
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