کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6718065 | 503529 | 2016 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impregnation and encapsulation of lightweight aggregates for self-healing concrete
ترجمه فارسی عنوان
اشباع و انسولاسیون سنگین وزن برای بتن خود درمان
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کلمات کلیدی
بتونی خودرا درمان کن اشباع، سنگین وزن، سیلیکات سدیم،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
This study investigated a technique of impregnating potential self-healing agents into lightweight aggregates (LWA) and the self-healing performance of concrete mixed with the impregnated LWA. Lightweight aggregates with a diameter range of 4-8 mm were impregnated with a sodium silicate solution as a potential self-healing agent. Concrete specimens containing the impregnated LWA and control specimens were pre-cracked up to 300 μm crack width at 7 days. Flexural strength recovery and reduction in water sorptivity were examined. After 28 days healing in water, the specimens containing the impregnated LWA showed â¼80% recovery of the pre-cracking strength, which accounts more than five times of the control specimens' recovery. The capillary water absorption was also significantly improved; the specimens healed with the impregnated LWA showed a 50% reduction in the sorptivity index compared with the control cracked specimens and a very similar response to the control uncracked specimens. The contribution of sodium silicate in producing more calcium silicate hydrate gel was confirmed by characterisation the healing products using X-ray diffraction, Fourier transform spectroscopy, and scanning electron microscopy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 124, 15 October 2016, Pages 910-921
Journal: Construction and Building Materials - Volume 124, 15 October 2016, Pages 910-921
نویسندگان
R. Alghamri, A. Kanellopoulos, A. Al-Tabbaa,