Abstract:
A great deal of the time, the actual percentage of waste produced is substantially more than
first anticipated, increasing the project's cost. Thus, reducing materials waste in building
projects could result in significant cost savings and profit growth. This Project work was
attempted to assess the current situation of mechanisms of minimizing wastage of concrete
and concrete making materials. The general objective of this study was to assess construction
resource wastage minimization mechanisms on concrete and major concrete making material
in Wolaita Sodo town building project this study also identifies the main cause’s wastes and
rank, identify the effects of the wastes and finally provided minimization practices of concrete
and main concrete making material wastes. The main tools for the collection of data included
questionnaires, interviews, site visits and document collected is used to identify the various
efforts that have been made in the past to evaluate and examine the causes and sources of
construction materials waste. The data analysed was calculated using the relative importance
index (RII). The findings of this project study indicated that the level of contribution of the
waste sources to the generation of waste saw differences between the perceptions of the
respondents (Contractors and consultants). The results from analysis ranked from the 1st to
5th position by contractors and consultants that the most significant factors causing
construction waste on building construction projects are Design and documentation,
Operation, Site management and practices, material and Site supervisor factors. The survey
focused on the four most dominant materials in terms of influencing the project costs which
are concrete and major concrete making material such as cement, sand, aggregate. The
variables were then ranked in their order of importance based on the response of the
consultant’s and contractors. Therefore, the project study's findings show that good
construction management, proper material handling and storage, encouraging the reuse of
waste materials, and the use of suitable software to reduce design changes and over ordering
are all necessary to minimize waste on building projects.
