A meta-analysis on the use of plastic waste as fibers and aggregates in concrete composites

Abstract

Many authors have previously reviewed the scientific literature about the use of plastic as aggregates and fibers in mortars and concrete. However, a full meta-analysis has never been conducted. Plenty of scientific data are available to be analyzed from published papers around the world. In this research, 435 experimental mixes using plastic as aggregates or as fibers were studied, belonging to 53 original papers. Scientific production related to these composites has had sustained growth since 2005. However, the largest amount of tests were carried out focusing mainly on the use of polyethylene terephthalate (PET), both as aggregates and as fibers. Thermo mechanical and technological properties were statistically analyzed, obtaining models for compressive strength, elasticity modulus, flexural strength and splitting tensile strength. As conclusion, this is the first general meta-analysis carried out about these composites and the main findings of this paper could be used by professionals and scientists, as well as an initial approach for elaboration of specific technical standards and codes.