کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1456987 | 989236 | 2011 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of the cementitious paste composition on the E-modulus and heat of hydration evolutions Influence of the cementitious paste composition on the E-modulus and heat of hydration evolutions](/preview/png/1456987.png)
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.
Journal: Cement and Concrete Research - Volume 41, Issue 8, August 2011, Pages 799–807