کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1457592 989270 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanisms and parameters controlling the tricalcium aluminate reactivity in the presence of gypsum
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Mechanisms and parameters controlling the tricalcium aluminate reactivity in the presence of gypsum
چکیده انگلیسی

To understand the mechanisms and the parameters controlling the reactivity of tricalcium aluminate in the presence of gypsum at an early age, a study of the hydration of the “C3A–sulphate” system by isothermal microcalorimetry, conductimetry and a monitoring of the ionic concentrations of diluted system suspensions have been carried out with various gypsum quantities. The role of C3A source and its fineness were also studied. This work shows the fast initial formation of AFm phase followed by ettringite formation during the period when the sulphate is consumed. It has been highlighted that the time necessary to consume all the gypsum varies with the type of C3A and it has been attributed to the intrinsic reactivity of each one and mainly to the change of fineness from one C3A to another. Results are discussed alongside hypothesis from the literature to explain the slowing down of C3A hydration process in the presence of calcium sulphate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 37, Issue 10, October 2007, Pages 1418–1426
نویسندگان
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