LAUSR

Abstract In the present work the carpet waste is modified to produce a new type of lightweight aggregates with a low bulk density for applications in concrete materials. The study suggests a new application for this kind of synthetic fiber-based floor covering materials to reduce the rate of disposal and protect environment through its contribution in cleaner environment and production. In this respect, physical and mechanical properties of lightweight concrete made from modified needle-felt carpet waste cuttings are investigated. A series of experiments including density measurement, compression, flexural and water absorption tests are performed to study the performance of concrete composed of carpet wastes. Through the investigation, the carpet wastes exhibited remarkable potential to be considered as lightweight aggregates. This type of materials increased ductility and load-bearing capacity of concrete in post-cracking region in a manner analogous to virgin synthetic fibers. The results of the study also emphasize the high environmental potential of modified carpet waste cuttings for the production of sustainable lightweight concrete and a replacement for usage of virgin polymer fibers.