کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1694633 | 1519074 | 2015 | 9 صفحه PDF | دانلود رایگان |
• Activation of kaolinitic clay with sodium hydroxide solution
• Alkali activated geopolymers were synthesized.
• The inorganic polymers' performance was satisfactory under ambient conditions.
• The inorganic polymers have excellent resistance to saline water and sulfate attack.
Alkali activated products were synthesized by activation of kaolinitic clay from Hiswa area, Jordan with a sodium hydroxide solution. These specimens were subjected to long-term durability tests under different environmental and chemical conditions. The geopolymer specimens undergo very low drying shrinkage. The specimens perform well under ambient, de-ionized water, wet–dry cycles, sea water, and sodium sulfate conditions. The newly developed material from Hiswa clay shows a stable strength under all these conditions. The specimens are however attacked by acid solutions and lose about 9.7% of their mass after 90 days of exposure. The alkali–silica reaction has highly affected the geopolymer specimens as indicated by cracking, expansion and loss of mechanical strength.
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Journal: Applied Clay Science - Volume 104, February 2015, Pages 229–237