عنوان مقاله [English]
Millions of tons of waste are produced each year, most of which is not recyclable or whose recycling process is extremely energy-consuming or polluting. Also, dumping these materials in the countryside has doubled the dangers to the environment. Recycling worn-out materials and using them in concrete making is a good strategy to attain the two goals of getting rid of waste and making high quality concrete. It is a good option for use in concrete as waste ceramic tile has an extremely resistant structure, a physical nature that cannot be processed in any recycling system and the fact that it is produced in huge amounts. Through this study, it is intended to survey the effect of waste ceramic tile powder on the mechanical properties of concrete. First, the waste ceramic tile provided from companies is milled at 325 meshes. After the pozzolan qualities of materials are confirmed and related standard controlled, oncrete samples with 10-40 percent of pozzolan substitution are made, and some physical and mechanical qualities are measured for different curing ages. The synchronous effect of silica fume is surveyed, as well as ceramic pozzolan. It had been deduced through measuring the compressive strength of the mentioned samples that substituting ceramic pozzolan for 30 percent of concrete would slightly decrease resistance long term. In addition to its slight decrease of resistance, using ceramic pozzolan considerably decreases the amount of water absorption. With only 5 percent of silica fume, the defects due to ceramic pozzolan usage could be eliminated from concrete. Eventually, after onsidering economical and environmental aspects, as well as taking concrete qualities into account, it was proven that ceramic pozzolan is suitable for making concrete, and that silica fume could be used to improve the qualities of pozzolan concrete.