EPS concrete is a lightweight material. In this study different sizes of expanded polystyrene (EPS) beads and polyamide-66 yarns were utilized to make a new lightweight concrete. Parts of the results were obtained from our earlier study reported as a novel lightweight concrete essentially having EPS and polyamide-66 yarns. The research showed that largest EPS beads disintegrate along the contact zone and can decrease the adhesion strength. The use of polyamide-66 yarns had a significant influence in crack reduction.