Improvement of the Bearing Capacity and Swelling of Ciampel Expansive Soil using Waste Foundry SandAnita Setyowati Srie Gunarti, Yulvi Zaika, Septyan Adi Kuntoro, As’ad Munawir, Eko Andi Suryo and HarimurtiE3S Web Conf., 500 (2024) 03001DOI: https://doi.org/10.1051/e3sconf/202450003001