کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1457801 989281 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-situ monitoring the realkalisation process by neutron diffraction: Electroosmotic flux and portlandite formation
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
In-situ monitoring the realkalisation process by neutron diffraction: Electroosmotic flux and portlandite formation
چکیده انگلیسی

Even though the electroosmotic flux through hardened cementitious materials during laboratory realkalisation trials had been previously noticed, it has never been in-situ monitored, analysing at the same time the establishment of the electroosmotic flux and the microstructure changes in the surroundings of the rebar. In this paper, two series of cement pastes, cast with CEM I and CEM I substituted in a 35% by fly ash, previously carbonated at 100% CO2, were submitted to realkalisation treatments followed on line by simultaneous acquisition of neutron diffraction data. As a result, it has been possible to confirm the electroosmosis as the driving force of carbonates towards the rebar and to determine the range of pH in the anolyte in which most of the relevant electroosmotic phenomena takes place. On the other hand, the behaviour of the main crystalline phases involved in the process has been monitored during the treatment, with the precipitation of portlandite as main result.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 36, Issue 5, May 2006, Pages 791–800
نویسندگان
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