【摘 要】
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The physical and chemical properties of ninety-one different fly ash products from different sources within the United States were evaluated.The evaluation
【机 构】
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CTLGroup, 5400 Old Orchard Rd, Skokie, IL 60077, USA
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
The physical and chemical properties of ninety-one different fly ash products from different sources within the United States were evaluated.The evaluation was conducted based on the standard physical and chemical requirements of ASTM C 618, "Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete." Physical properties including fineness, density, water requirement and strength activity index (SAI), and major chemical properties including acidic elemental analysis and loss on ignition (LOI) were characterized in accordance with the testing procedures described in ASTM C311, "Standard Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete." In this paper, the effects of fineness and carbon content on water requirement;and the effects of fineness, acidic oxide content,calcium content, total alkali content and carbon content (derived from thermogravimetry) on 7-day strength activity index are described.In addition, the relationship between 7-day and 28-day SAI is presented.
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