کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1694067 1519059 2016 9 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrated lime/potassium carbonate as alkaline activating mixture to produce kaolinitic clay based inorganic polymer
ترجمه فارسی عنوان
کربنات آهکی / پتاسیم هیدراته به عنوان ترکیب فعال قلیایی برای تولید پلیمر معدنی بر پایه کائولینیتیک
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی


• Low cost alkaline activating mixture is developed.
• The developed alkaline mixture is always composed of solid and liquid fractions.
• Hydrous kaliophilite is the main product of activating kaolinite rich clay.
• A maximum mechanical strength (39 MPa) is obtained.
• The alkali-activation product is a strong and stable material.

The stability as a function of storage time of an alkaline mixture developed by reacting hydrated lime (Ca(OH)2) with a solution of potassium carbonate (K2CO3) has been studied. The chemical and microstructure of alkali-activated kaolinite using the developed alkaline mixture were studied using XRD, ATR-FTIR, TGA and EDX-SEM. Over storage time of 24 h, the developed alkaline mixture was always composed of solid and liquid fractions. The solid fraction was characterized as a mixture of hydrated lime, butschliite (Ca2K6(CO3)5·6H2O) and calcite (CaCO3), and the liquid fraction as a solution saturated with K+ ions in a highly alkaline environment (OH−). The inorganic polymer was dominated by hydrous phase of kaliophilite (K2Si2Al2O8·3H2O), hydrated lime, butschliite and calcite. Different mixing procedures of water, hydrated lime and potassium carbonate with kaolinitic clay were used to produce an inorganic polymer, whose strength and stability were evaluated in terms of unconfined compressive strength under dry and saturated conditions. A maximum dry strength of 39 MPa and a maximum soaked and cycled strength of 11 MPa were obtained. A low cost-environment friendly alkaline mixture was developed to produce kaolinitic clay based inorganic polymer for construction and industrial applications.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 126, June 2016, Pages 278–286
نویسندگان
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