کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1457674 989274 2008 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamic modelling of the effect of temperature on the hydration and porosity of Portland cement
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Thermodynamic modelling of the effect of temperature on the hydration and porosity of Portland cement
چکیده انگلیسی

The composition of the phase assemblage and the pore solution of Portland cements hydrated between 0 and 60 °C were modelled as a function of time and temperature. The results of thermodynamic modelling showed a good agreement with the experimental data gained at 5, 20, and 50 °C. At 5 and at 20 °C, a similar phase assemblage was calculated to be present, while at approximately 50 °C, thermodynamic calculations predicted the conversion of ettringite and monocarbonate to monosulphate.Modelling showed that in Portland cements which have an Al2O3/SO3 ratio of > 1.3 (bulk weight), above 50 °C monosulphate and monocarbonate are present. In Portland cements which contain less Al (Al2O3/SO3 < 1.3), above 50 °C monosulphate and small amounts of ettringite are expected to persist. A good correlation between calculated porosity and measured compressive strength was observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 38, Issue 1, January 2008, Pages 1–18
نویسندگان
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