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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 Topics in Concrete: Pozzolan; Cementitious Material; Materials in Concrete; 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
Topics in Concrete: Pozzolan; Cementitious Material; Materials in Concrete; Concrete Fundamentals