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تحقیقات سیمان و بتن 2011
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • influence of mineralogy on the hydraulic properties of ladle slag

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 933
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the present study is aimed at investigating the hydraulic characteristics of ladle furnace slag (lfs), under the pretence of using lfs as a cement substitute in certain applications. furthermore, lfs has been considered as a possible activator in a blend containing 50% lfs, and 50% ground granulated blast furnace slag (ggbfs). phases detected in lfs were quantified using rietveld analysis. calorimetric studies were performed at 20, 25 and 30 °c in order to calculate the apparent activation energy of hydration and thereby to suggest a kinetic model for the tested compositions within this temperature interval. in addition, compressive strength tests were performed on mortar prisms made with lfs, and lfs/ggbfs which had hydrated for 2, 7 and 28 days. both compositions reached acceptable early strengths, (e.g. lfs, 33.1 mpa, and lfs/ggbfs, 17.9 mpa, after 2 days), but after 28 days hydration the blend was superior to neat lfs. related apparent activation energies were determined using an avrami–erofeev model and gave ea = 58 kj/mol for neat lfs and ea = 63 kj/mol for the blend. the results imply that lfs or a lfs/ggbfs blend can be favourably used as supplement in binder applications such as binder in by-product metallurgical briquettes, which are used as recycle to the blast furnace or basic oxygen furnace depending on the specific briquette composition.

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