عنوان مقاله [English]
Production of lightweight aggregate is usually done by different clayey materials. Some kinds of wastes can be utilized in its production. In this research, waste materials of Zarand coal processing plant waere added with the following percent 1, 2, 3, 4, 5, 6, 7, 8, 10, 15 and 20 to the raw material of Omranpars lightweight aggregate production plant and burned at 1140 °C for 5 minutes. Density, compressive strength and water absorption of produced samples were analyzed. FE- SEM images of some samples were taken for further studies. Results show that the optimum percentage of Coal waste addition is 3%, which was tested between 1110 °C to1160 °C to find the optimum burning temperature. The optimum temperature was between 1140 °C to 1150 °C. At this temperature and coal waste addition percentage density was 265kg/m3, water absorption was 15.2% and compressive strength was 0.8 MPa.
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