Effective use of construction material is profitable in the industry as well as in the economy of any country. This research is aimed to cause of material wastage and rank highly wasted construction material on public building projects in western Oromia. The result of the study analyses, mostly causes of construction materials are; Changes made to the design while construction is in progress, Lack of attention paid to dimensional coordination of products, Damage during transportation, Improper planning for required quantities, Designer’s inexperience in method and sequence of construction. In addition, causes of construction material wastages are presented under seven attributes causes. As well as wastage of material on eight key construction, material are ranked as concrete, wooden formwork, block, and steel are most wasted by asking respondents based on their experience in the construction industry. Generally, wastage of material is highly occurred in every activity i.e. during design, construction and during the production of the material.
An Analysis of Construction Material Batching Behaviour of Artisans in Ghana’s Informal Construction Sector. (Published)
This study investigated construction materials-batching behaviour of artisans in the Ghana informal construction sector. The research was conducted in three major townships across three districts namely: Mepe/Battor in the Volta Region, Pokuase in the Eastern Region and Nsawam in the Eastern Region of Ghana. To achieve the study objectives, a quantitative data collection approach was adopted as the primary methodology for gathering data from the target population using cluster-sampling technique to select the sample population. The results showed that the Ghana informal construction sector paid scanty attention to the standard practices and procedures for constructing residential buildings. Reasons included inadequate levels of apprenticeship training to grow the skills and competence of artisans. Low-quality training duped apprentices into thinking that they were fully qualified when in reality they were not. Not only that, apprenticeship varied widely across construction trades and master craftsmen. Batching was generally eyeballed instead of being measured scientifically resulting in insufficient cement to aggregate ratio in cement blocks, concrete and mortar works. Also, cement and aggregate mixtures had high percentage of water. Weak cement blocks resulted in poor construction and weak buildings with rising moisture content in walls, leaking roofs, cracks and structural failure.