FACTORS FOR CONSTRUCTION MATERIAL WASTAGE IN METU: THE CASE OF SELECTED BUILDING

The objective of this study is to assess the major contributing factors of construction material waste in Metu building construction projects. From the number of building constructions found in Metu, building contractors one, two and three were selected as the target population. To meet the objective of the study, a questionnaire and key informant interview were used as data collection tools. Among the distributed 50 questionnaires for the construction companies, 40 were collected. Simple statistical analysis involving tables and percentages were used in analyze the results from the questionnaire.. The finding of this research indicates that “Frequent design changes at construction stage”, “Rework due to workers mistakes” and “Poor quality of materials” were the three major factors of construction material waste among the 44 identified factors. In addition, high amount of concrete wastage was identified as the top major contributing factors in the performance of building construction projects since concrete uses in larger quantity in construction sites. Beside this, the results obtained indicate, the construction material waste minimizing measures are not practiced yet in construction sites. The results of this study recommended that there is a need to establish strong communication towards the scope of work in the design phase of the project based on the client interest. And adoption different technologies like prefabrication and precast units, proper detailing during designing, coordinating dimensions between materials and the design, and planning ahead to minimize design changes are sensible mechanisms.