Monitoring hydration process and quality of sand grouted with microfine-cement using shear wave velocity and electrical conductivity measurementsHyunwook Choo, Hongyeop Nam, Changho Lee, Woojin Lee and Susan BurnsE3S Web Conf., 92 (2019) 11012DOI: https://doi.org/10.1051/e3sconf/20199211012