A field based methodology for estimating waste generation rates at various stages of construction projects

• Estimation of generated rates is the first step for managing construction waste (CW).
• Limitations of existing methods for CW estimation were argued.
• A field-based methodology was developed to estimate CW generation rates.
• The methodology was illustrated using data collected from 28 construction sites.
• The estimated CW generation rates were used to develop a generalized CW management plan.

The growth in construction activities over the past two decades has resulted in a parallel increase in the amount of generated construction waste. This growth, coupled with shortages in landfill space particularly in urban areas, has proven to be a challenging stressor to the environment. Management of construction waste has thus become a problem attracting increasing attention worldwide. In this context, the quantification of waste streams generated from various construction stages is the first step for managing construction waste. In this study, a methodology for quantifying waste streams arising at various construction stages is proposed. The methodology is then tested at a field scale to estimate generation rates for major waste streams and the total construction waste generation rate for the purpose of developing a generalized construction waste management plan that can be applied at a city/regional/country level. The results of the study reveal that the total construction waste generation rate falls within the range of 38–43 kg/m2, with masonry and concrete constituting more than 60% of the total waste. The study concludes with a set of recommendations addressing the most important issues contributing to a successful implementation of an integrated construction waste management plan.