Effect of Rice Husk Ash and Fly Ash on the workability of concrete mixture in the High-Rise ConstructionLam Van Tang, Boris Bulgakov, Sofia Bazhenova, Olga Aleksandrova, Anh Ngoc Pham and Tho Dinh VuE3S Web Conf., 33 (2018) 02029DOI: https://doi.org/10.1051/e3sconf/20183302029