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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 pozzolan? A. A pozzolan is a siliceous or siliceous and aluminous material that in itself possesses little or no cementitious value but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperatures to form compounds having cementitious properties. It is therefore classified as cementitious material. There are both natural (ACI 232.1R) and artificial (fly ash, ACI 232.2R, and silica fume, ACI 234R) pozzolans. Descriptions of various kinds of pozzolans and specifications for them are given in ASTM C618 and ASTM C1240. References: SP-1(02); E3-13 ; SP-221; ACI CT-23; ACI 232.1R-12; ACI 232.2R-03; ACI 234R-06; ASTM C618; ASTM C1240 Topics in Concrete: Pozzolan; Cementitious Material; Materials in Concrete; Concrete Fundamentals
Q. What is a pozzolan?
A. A pozzolan is a siliceous or siliceous and aluminous material that in itself possesses little or no cementitious value but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperatures to form compounds having cementitious properties. It is therefore classified as cementitious material. There are both natural (ACI 232.1R) and artificial (fly ash, ACI 232.2R, and silica fume, ACI 234R) pozzolans. Descriptions of various kinds of pozzolans and specifications for them are given in ASTM C618 and ASTM C1240.
References: SP-1(02); E3-13 ; SP-221; ACI CT-23; ACI 232.1R-12; ACI 232.2R-03; ACI 234R-06; ASTM C618; ASTM C1240
Topics in Concrete: Pozzolan; Cementitious Material; Materials in Concrete; Concrete Fundamentals
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