Tamire chaka , Shanbel Tadesse , Amanuel Wondu, Nebiyu Mohammed , Nowiwerk Abera.Moges Getahun
The need for human being is shelter. In the entire world the population is increasing day to day for that the human need shelter for living. Building is permanent or temporary structure enclosed with in exterior wall, roofs, and including all attached structures that cannot be removed without cutting in to ceiling, floors or walls. Building serve societal needs primarily as shelter from weather, security, living space, privacy, to store belongings and to comfortably live and work now a day. The house construction of our country is very difficult due to many reason one of those are the cost of finishing materials. Among the finishing materials, roof ceiling is one of them. Most of the product is imported from abroad having a high cost. This research work investigated the potential applicability of waste paper in the production of ceiling boards with focus on achieving: environmental sustainability, safe disposal of waste paper and more cost effective production of materials. The main aim was to provide locally produced and environmental ceiling board that are cost effective. Four mix designs were formulated and used for the casting (1:0:6, 1:1:5, 1:2.5:3.5 and 1:2:4) Ordinary Portland cement, Sawdust and waste paper ratios respectively, varying in regards of the weight of the waste paper components. exhausted Cereal powder (maize, barely, sorghum, wheat) was added to the mix as an additive to aid binding. The mix design was satisfactory for the production of roof ceiling prototype having size of 40cm in length, 40 cm in width and 1.5 cm in thickens, and laboratory experiments were conducted to determine the properties and suitability of the produced boards. Properties such as water absorption, abrasion, modulus of rupture, pull-out and cutting test, and flexural strength and ultimate loads were considered for comparison. The boards with 1:2:4 mix ratios displayed the best results of the test properties hence, its mechanized manufacturing was recommended.