کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155543 | 1666352 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fly ash based geopolymeric foams using silica fume as pore generation agent. Physical, mechanical and acoustic properties
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The aim of this work is the development of a porous geopolymeric foam with sound absorbing properties using silica fume as the pore generation agent. The samples were manufactured using a coal combustion fly ash as source material for the geopolymerization reaction, an alkaline solution as activating solution and silica fume as pore forming agent. Three parameters were studied: silica fume proportion (0, 20 and 40â¯wt%), activating solution (potassium silicate and potassium hydroxide) and setting temperature (40 and 70â¯Â°C). Once the samples were prepared, the experimental study of the most important physical, mechanical and acoustic features were carried out. The increase in the proportion of silica fume in the mixture and setting temperature produced a reduction in setting time and a raise of open void porosity, reducing the compressive strength at 28â¯days up to a half but increasing the sound absorption. The influence of activating solution in open porosity and sound absorbing properties was not very important.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 500, 15 November 2018, Pages 196-204
Journal: Journal of Non-Crystalline Solids - Volume 500, 15 November 2018, Pages 196-204
نویسندگان
Y. Luna-Galiano, C. Leiva, C. Arenas, C. Fernández-Pereira,