• influence of the cementitious paste composition on the e-modulus and heat of hydration evolutions

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 839
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     e-modulus and heat of hydration are features of cement-based materials that follow a rapid rate of change at early ages. this paper analyses the influence of the composition of cementitious pastes on these features by using two methods: (i) a novel technique for continuously monitoring the e-modulus of cement-based materials, based on evaluating the first resonant frequency of a composite beam containing the material under testing, and (ii) an isothermal calorimeter to determine the released heat of hydration. seventeen mixes are tested, encompassing pastes with five w/c ratios, as well as different contents of limestone filler, fly ash, silica fume and metakaolin. the results permit the comparison of the e-modulus and heat of hydration sensitivities to mix composition changes, and to check possible relations between these features. this work also helps to establish the technique (i) as a non-destructive method for monitoring the e-modulus evolution in cement-based materials since casting.

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