کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1457416 989259 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bacterial carbonate precipitation improves the durability of cementitious materials
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Bacterial carbonate precipitation improves the durability of cementitious materials
چکیده انگلیسی

Shortcomings of conventional surface treatments have drawn the attention to alternative techniques for the improvement of the durability of concrete. This paper reports the effects of bacterial carbonate precipitation (biodeposition) on the durability of mortar specimens with different porosity. Durability was assessed from the permeation properties and resistance towards degradation processes. The surface deposition of calcium carbonate crystals decreased the water absorption with 65 to 90% depending on the porosity of the specimens. As a consequence, the carbonation rate and chloride migration decreased by about 25–30% and 10–40% respectively. An increased resistance towards freezing and thawing was also noticed. The results obtained with the biodeposition treatment were similar as those obtained with conventional surface treatments.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 38, Issue 7, July 2008, Pages 1005–1014
نویسندگان
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