Assessment of Construction and Demolition Waste Recycling Practices on Selected Buildings in Addis Ababa
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Date
2023-05
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Addis Ababa University
Abstract
Construction and demolition waste accounts for a significant portion of global solid waste
production, with the majority of it ending up in landfills. Parallel to the rise in environmental
consciousness, there is a growing awareness of waste issues all over the world. As a result,
developing some construction and demolishing waste management solutions has become
important.
The objectives of this study is on examining the major building construction and demolishing
waste materials, current practice of building construction and demolishing waste recycling, and
testing the identified major building construction and demolishing waste material on selected
buildings in Addis Ababa. The quantitative data gathered from the questionnaire was analyzed
by straight forward percentages and frequency using SPSS. All other categories of respondents'
interviews and responses/opinions to open ended data have yielded qualitative data and were
summarized.
The findings of this research revealed that most contractors try to reuse materials before
disposing them but do not consider recycling at the site as an option; in terms of recycling, 4% of
contractors said they recycle the waste from building construction and demolishing. And as for
the amount of wastage from building construction and demolishing, HCB and cement take the
first and the second place with 30 and 26 percentages respectively. The study also carried out
laboratory test to compare the density and compressive strength of HCB with 50% replacement
of its course aggregate with recycled HCB and HCB with standard mix which the HCB with
50% replacement yielded approximately close result to the HCB with standard mix.
The study also found that contractors believe that by raising awareness, building recycling
plants, and providing government incentives, recycling building construction and demolishing
waste could be taken as an option by most contractors also potentially attracting private investors
to invest in recycling factories