کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1457803 989281 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydration of β-dicalcium silicate at high temperatures under hydrothermal conditions
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Hydration of β-dicalcium silicate at high temperatures under hydrothermal conditions
چکیده انگلیسی

Hydration of β-dicalcium silicate was carried out under hydrothermal conditions at different temperatures from 50 °C to 400 °C up to 5 days by using two methods to start the reactions at room temperature or at a desired reaction temperature. 9 C-S-H phases with the same Ca/Si ratio as precursor (γ-dicalcium silicate hydrate and α-dicalcium silicate hydrate and dellaite), Ca-rich compositions (jaffeite and reinhardbraunsite), Si-rich compositions (Ca8Si5O18, kilchoanite and foshagite), and C-S-H gel were obtained at the initial stage of the hydration of β-dicalcium silicate. The reaction products were different in dependence in the hydrothermal processes. It was found that α-dicalcium silicate hydrate was directly formed from β-dicalcium silicate at low temperatures below 220 °C. The products obtained at above 240 °C were different in dependence in the hydrothermal processes, due to the different decomposition route of γ-dicalcium silicate hydrate, the initial product from β-dicalcium silicate. The room temperature mixing method gave reinhardbraunsite and kilchoanite through Ca8Si5O18. In the case of the high temperature mixing method, γ-dicalcium silicate hydrate decomposed to from Ca8Si5O18 and reinhardbraunsite with jaffeite, then Ca8Si5O18 decomposed to from jaffeite and kilchoanite, and final products at 400 °C were reinhardbraunsite and foshagite which was formed from kilchoanite.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 36, Issue 5, May 2006, Pages 810–816
نویسندگان
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