Febrianto, Adi Febrianto, Hasyim Aidilichsan Muliawan, and Mochamad Chalid. 2026. “Study of Lignin Addition As Coupling Agent on Paving Block Properties Made With Polypropylene”. Jurnal Sains Materi Indonesia 28 (1):70-75. https://doi.org/10.55981/jsmi.2026.15430.