کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6721701 | 503576 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental investigations of aerogel-incorporated ultra-high performance concrete
ترجمه فارسی عنوان
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
Improvements to concrete will have a large impact in the construction and building sector. As the attention is drawn towards energy-efficient and zero emission buildings, the thermal properties of concrete will be important. Attempts are being made to decrease the thermal conductivity of concrete composites while retaining as much as possible of the mechanical strength. In this study experimental investigations of aerogel-incorporated mortar (AIM) with up to 80Â vol% aerogel are prepared utilizing a reduced ultra-high performance concrete (UHPC) recipe. It was found that at 50Â vol% aerogel content, the AIM sample possessed a compressive strength of 20Â MPa and a thermal conductivity of â0.55Â W/(mK). This strength decreased by almost a factor of 4-5.8Â MPa, while gaining only a 20% improvement in thermal conductivity when aerogel content increased to 70Â vol%. No preferred gain in properties was observed as compared to a normal mortar system. This can be attributed to the imbalance of the particle-matrix ratio in the mortar system, causing a decrease in adhesion of the binder-aggregates. The AIM samples have been characterized by thermal conductivity and mechanical strength measurements, alongside scanning electron microscope (SEM) analyses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 77, 15 February 2015, Pages 307-316
Journal: Construction and Building Materials - Volume 77, 15 February 2015, Pages 307-316
نویسندگان
Serina Ng, Bjørn Petter Jelle, Linn Ingunn Christie Sandberg, Tao Gao, Ãlafur Haralds Wallevik,