FACTORS AFFECTING MATERIAL WASTE MANAGEMENT IN CONSTRUCTION PROJECTS: THE CASE OF ADDIS ABABA BOLE INTERNATIONAL AIRPORT EXPANSION PROJECT

Abstract

This study investigates the factors affecting material waste management in the AABIA Expansion Project. The research employs qualitative and quantitative data collection techniques, including interviews, surveys, and document analysis. Stratified random sampling was used to sample 212 respondents, in which 151 were used for analysis. Data was collected through questionnaires and analyzed using SPSS, using frequency descriptions analysis. The findings reveal that a complex interplay of factors, including project planning, material procurement, construction practices, and waste management systems, significantly influences material waste generation. A key finding is the critical role of effective project planning in minimizing material waste. Detailed material take-offs, optimized material delivery schedules, and the implementation of lean construction principles emerged as crucial strategies to reduce excess material and minimize waste generation. Additionally, the procurement process was identified as a significant factor, with careful material selection and supplier evaluation playing a pivotal role in ensuring the acquisition of appropriate materials and minimizing waste. Practices, such as waste segregation, recycling, and reuse, were found to be essential in reducing the environmental impact of the project. The establishment of efficient waste management systems, including waste collection, transportation, and disposal, was also highlighted as a crucial component of effective waste management. However, challenges such as a lack of awareness, inadequate infrastructure, and limited financial resources hindered the implementation of optimal waste management practices. To address these challenges and promote sustainable construction practices, several recommendations are proposed. These include the development of a comprehensive waste management plan, the adoption of advanced technologies such as Building Information Modeling (BIM), the establishment of a strong material tracking system, and the implementation of strict waste reduction targets. By embracing these recommendations and fostering a culture of sustainability, the construction industry can reduce material waste.