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Go to Editorial ManagerSilica particles are directly introduced into polyurethane resin with different grain size and different volume fractions to obtain a new composite. Hardness, impact strength (charpy) and compression properties were studied with the conditions mentioned; Acid solutions and UV- radiation were the main environments studied on the samples prepared. The results showed that the acid affected the properties more than UV- radiation
Fire clay are directly into kaolin with different weight percent. Density, shrinkage , water adsorption properties were studies at )1000C0 (and )1200C0 ( . All samples pressed under (10 tan) . The results showed that the fire clay increase density , at the same time decrease the shrinkage and water adsorption .