المجلة الدولية للعلوم والتقنية

The current using levels of plastic water bottles and their disposal processes causes many environmental problems and they are often used once and this indicates that the current use of water bottles is not sustainable.Also, the increasing demand for marble and the solid and liquid waste that results from it during its preparation for final use, which is disposed of by throwing it beside roads or in agricultural lands and rainwater and sewage sewers. Therefore, recycling to benefit from these wastes is one of the most important activities currently available to reduce these effects. This study aims to produce environmentally friendly concrete as a solution to get rid of waste by adding powdered plastic water bottles (PET) to concrete as a percentage of the weight of cement, and adding marble factories waste in the form of powder to concrete by replacing it with a part of fine aggregate and studying its effect on the properties of concrete. The results showed that the addition of plastic and marble to the concrete had a positive effect in increasing the concrete's resistance to compression, as the amount of increase at the age of 28 days was (9.55%) and (7.95%), respectively, compared to the reference mixture, the samples were exposed to heat an increase in compressive strength was observed by 6.27% for concrete containing plastic compared to the reference mixture. Key words: Concrete, Plastic water bottles, Polyethylene terephthalate (PET), Natural Marble, Waste.