کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1454782 1509690 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Supercritical carbonation of calcareous composites: Influence of curing
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Supercritical carbonation of calcareous composites: Influence of curing
چکیده انگلیسی

This paper reports the effect of curing on the susceptibility of cementitious composites to carbonation using supercritical carbon dioxide. Samples made using a compression moulding technique were cured in water before and/or after carbonation and the effect on porosity, microstructure, solid phase assemblage and flexural strength was determined. In terms of development of mechanical strength, no benefit was gained from any period of pre- or post-carbonation curing regime. Yet samples cured prior to carbonation underwent minimal chemical reaction between supercritical carbon dioxide and calcium hydroxide, unhydrated cement or C–S–H. Thus there was no correlation between chemical degree of reaction and strength development. The effects responsible for the marked strength gain in supercritically carbonated samples must involve subtle changes in the microstructure of the C–S–H gel, not simple pore filling by calcium carbonate as is often postulated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Composites - Volume 43, October 2013, Pages 48–53
نویسندگان
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