title: Technical assessment of three layered cement-bonded boards produced from wastepaper and sawdust.
abstract: The technical properties of three layered cement-bonded boards (CBBs) made from wastepaper and sawdust were investigated. The CBBs were produced at three density levels of 1000, 1200 and 1300 kg/m3 and at four cement/particle ratios of 2.0:1, 2.5:1, 3.0:1 and 3.5:1 on a weight to weight basis. The technical properties evaluated were modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swelling (TS). The MOR values ranged from 4.85 to 11.69 MPa and MOE values ranged from 2.80 to 5.57 GPa. The mean values of WA and TS after 24 h of water soaking of the CBBs ranged from 18.18% to 40.49% and 3.55% to 12.13%, respectively. MOR and MOE of the CBBs increased with increase in board density, but MOR decreased with the increase in cement/particle ratio. On the other hand, WA and TS decreased with increase in board density and cement/particle ratio. CBBs produced from wastepaper and sawdust at cement/particle ratios of 3.0:1 and 3.5:1 are suitable for building construction such as paneling, ceiling and partitioning.
authors.affiliation: Department of Forestry and Wood Tech, Federal University of Technology, PMB 704 Akure, Nigeria.
authors.forename: Joseph Adeola
authors.initials: JA
authors.lastname: Fuwape
authors.forename: James Sunday
authors.initials: JS
authors.lastname: Fabiyi
authors.forename: Edward Olusola
authors.initials: EO
authors.lastname: Osuntuyi
mesh_terms: D000042:Absorption; D003252:Construction Materials; D004391:Dust; D004548:Elasticity; D010209:Paper; D014866:Waste Products; D014867:Water
chemical_list: D004391:Dust; D014866:Waste Products; D014867:Water