Characterization of low-purity clays for geopolymer binder formulation
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第6期
论文作者：Nasser Y.Mostafa Q.Mohsen A.El-maghraby
文章页码：609 - 619
摘 要：The production of geopolymer binders from low-purity clays was investigated. Three low-purity clays were calcined at 750°C for4 h. The calcined clays were chemically activated by the alkaline solutions of NaOH and Na2SiO3. The compressive strength was measured as a function of curing time at room temperature and 85°C. The results were compared with those of a pure kaolin sample. An amorphous aluminosilicate polymer was formed in all binders at both processing temperatures. The results show that, the mechanical properties depend on the type and amount of active aluminum silicates in the starting clay material, the impurities, and the processing temperature.
Nasser Y.Mostafa1,2，Q.Mohsen1，A.El-maghraby1,3
1. Materials and Corrosion Lab (MCL), Department of Chemistry, Faculty of Science, Taif University2. Department of Chemistry, Faculty of Science, Suez Canal University3. Refractory & Ceramics Department, National Research Center,Dokki 12622, Cairo, Egypt
摘 要：The production of geopolymer binders from low-purity clays was investigated. Three low-purity clays were calcined at 750°C for4 h. The calcined clays were chemically activated by the alkaline solutions of NaOH and Na2SiO3. The compressive strength was measured as a function of curing time at room temperature and 85°C. The results were compared with those of a pure kaolin sample. An amorphous aluminosilicate polymer was formed in all binders at both processing temperatures. The results show that, the mechanical properties depend on the type and amount of active aluminum silicates in the starting clay material, the impurities, and the processing temperature.
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