Production of durable and cost effective sewer pipes using petroleum and industrial waste by-productsMaisa El Gamal, Amr El-Dieb, Khaled El-Sawy, Amr Sweedan and Abdel-Mohsen MohamedMATEC Web Conf., 120 (2017) 03013DOI: https://doi.org/10.1051/matecconf/201712003013