Stability Performance of the Mixture of Bentonite and Zeolite as Landfill Liner Mochamad Arief Budihardjo, Fadel Iqbal Muhammad, Alfian Rizky Rizaldianto, Endro Sutrisno and Irawan Wisnu Wardhana E3S Web Conf., 125 (2019) 07012 Published online: 28 October 2019 DOI: 10.1051/e3sconf/201912507012