کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5441316 1510383 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of acid attack on microstructure and composition of metakaolin-based geopolymers: The role of alkaline activator
ترجمه فارسی عنوان
اثر حمله اسید بر ریزساختار و ترکیب ژئوپلیمرهای مبتنی بر متاکائولین: نقش فعال کننده قلیایی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
The mineral composition of raw materials and the type of alkali cation plays an important role in the acidic resistance of geopolymers. This paper focuses on the study of chemical durability in hydrochloric acid of potassium and sodium based geopolymers. The study was carried out on two Algerian kaolins and compared with a kaolin from Charente (France). The acid degradation was studied using X-ray Diffraction, Fourier-Transform Infrared and Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy. The samples based on Algerian kaolins seems to have the lowest loss in mass for formulations based on potassium due to the presence of secondary minerals (quartz and muscovite). They could have occupied the pores avoiding the release of alkali cations into the acidic solution. Regarding to sodium geopolymers, the best behavior was observed with the kaolin from Charente, which can be attributed to a more stable aluminosilicate cross-linked polymer structure formed for this material, which was corroborated with the Fourier-Transform Infrared analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 463, 1 May 2017, Pages 128-137
نویسندگان
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