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نشریه مهندسی عمران و مصالح کاربردی || دوره چهارم - شماره سه
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  • iranian eocene green tuffs as natural pozzolan for use in cement industries

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    • تاریخ ارائه: 1400/09/21
    • تاریخ انتشار در تی پی بین: 1400/09/21
    • تعداد بازدید: 213
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس ژورنال: 02166176087

    iranian eocene green tuffs as natural pozzolan for use in cement industries

    eocene green tuffs are widespread in central alborz in the north of iran. in parts, they are used as natural pozzolan. in this study, the pozzolanic activities of tuff samples from qazvin to semnan in alborz mountain were examined. the pozzolanic activity patterns vary in different beds and even change laterally.

    chemical examination of the samples indicated that they all belonged to the acidic rock group and were consistent with related standards. the pozzolanic activity was calculated for samples using a hydraulic factor, thermal analysis, and ion concentrations.

    data obtained based on the thermal analysis presented a range of pozzolanic activities for tuffs with similar chemistry and appearance. it was found in this research that mineralogy and texture controlled pozzolan activity. tuffs with high activity had glass in their matrix, but weathering and recrystallization reduced the activity. petrographical examinations play an essential role in evaluating the availability of tuffs as natural pozzolan in central alborz.

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