کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6721334 | 503571 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface treatment of concrete bricks using calcium carbonate precipitation
ترجمه فارسی عنوان
درمان سطح آجر بتونی با استفاده از بارش کربنات کلسیم
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کلمات کلیدی
بتن، باران های معدنی، طول عمر استحکام،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
A new surface treatment method using mineral precipitation is proposed in this study for treating concrete and similar porous materials to enhance their durability and mechanical properties. The major innovation of this method is that a green solvent dimethyl carbonate (DMC) is used to replace expensive bacteria and their nutrients in the microbiologically induced calcite precipitation (MICP) method so that the drawbacks of the MICP method can be overcome. In the basic environment of concrete, DMC can be hydrolyzed slowly to produce carbonate which is then used to form calcium carbonate precipitant. The resulted calcium carbonate particles can then seal/fill the surface cracks/voids of the porous material, and therefore, enhance the durability and strength of the material. As verification, this method was used to treat concrete bricks. Testing data show that the water absorption of the concrete bricks can be significantly reduced and the compressive strength can be significantly increased by this method. The mineral precipitated on the surface of the treated specimens identified by scanning electron microscope imaging was confirmed as calcite by X-ray diffraction (XRD) analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 80, 1 April 2015, Pages 273-278
Journal: Construction and Building Materials - Volume 80, 1 April 2015, Pages 273-278
نویسندگان
Shahrooz Amidi, Jialai Wang,