title: Use of cement dust in the manufacture of vitrified sewer pipes.
abstract: Waste by-pass cement dust was added in different percentages ranging from 2% to 10% to a standard mix for sewer pipes manufacture, as a substitute for expensive feldspar. It was found that a mix consisting of 45% kaolin, 36% ball clay, 9% grog and 10% by-pass dust and fired at a temperature of 1300 degrees C for 4 h yielded samples that meet the standards. It was possible to reach a water absorption of 4%, a modulus of rupture of 7.8 MPa and a resistance to acids and alkalis conforming with standard values. A test pipe was fabricated by vacuum extrusion using the suggested composition and was found to withstand a hydraulic pressure of 14 MPa for one minute without the appearance of any cracks.
authors.affiliation: The Chemical Engineering Department, Faculty of Engineering, Cairo University, Giza, Cairo, Egypt.
authors.forename: S A
authors.initials: SA
authors.lastname: El Sherbiny
authors.forename: N F
authors.initials: NF
authors.lastname: Youssef
authors.forename: O A
authors.initials: OA
authors.lastname: Ibrahim
authors.forename: M F
authors.initials: MF
authors.lastname: Abadir
mesh_terms: D003247:Conservation of Natural Resources; D003252:Construction Materials; D004391:Dust; D005898:Glass; D008422:Materials Testing; D012499:Sanitation / Q000295:instrumentation*; D012722:Sewage; D013696:Temperature; D018505:Waste Management
chemical_list: D004391:Dust; D012722:Sewage