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11.12 Concrete Batching - US EPA
properties. Typical examples are natural pozzolans, fly ash, ground granulated blast-furnace slag, and silica fume, which can be used individually with portland or blended cement or in different combinations. Chemical admixtures are usually liquid ingredients that are added to …
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Fly Ash, Slag, Silica Fume, and Natural Pozzolans, Chapter 3
www.ce.memphis.eduFly Ash, Slag, Silica Fume, and Natural Pozzolans Fly ash, ground granulated blast-furnace slag, silica fume, and natural pozzolans, such as calcined shale, calcined clay or metakaolin, are materials that, when used in conjunc-tion with portland or blended cement, contribute to the properties of the hardened concrete through hydraulic or
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lauwtjunnji.weebly.comNatural Pozzolans for Use as a Mineral Admixture in ... Natural Pozzolan for Use as a Mineral Admixture in ... C 1240 Specification for Use of Silica Fume as a Mineral Admixture in Hydraulic-Cement Concrete, Mortar, and Grout3 C 1260 Test Method for Potential Alkali Reactivity of
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www.ce.memphis.edu(portland cement, blended cement, fly ash, slag, silica fume, and natural pozzolans). The water-cementitious material ratio selected for mix design must be the lowest value required to meet anticipated exposure conditions. Tables 9-1 and 9-2 show requirements for various expo-sure conditions. When durability does not control, the water-cementi-
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cdnassets.hw.net(ASTM C989), and especially silica fume (ASTM C1240) can improve chemical resistance by reducing the permeability of the concrete and by producing additional cementitious compounds. Dosages by mass of cementitious material often range from 15% to 25% for Class F fly ash, 15% to 40% for Class C fly ash, 35% to 50% or more for slag,