Study the Behaviour of Hardness properties at different grain size of Libyan Calcium Carbonate-filled HDPE Composite. Journal of Pure & Applied Sciences , [S. l.], v. 22, n. 3, p. 1–8, 2023. DOI: 10.51984/jopas.v22i3.2720. Disponível em: https://www.sebhau.edu.ly/journal/jopas/article/view/2720. Acesso em: 30 jan. 2026.