Browsing by Author "Obiri-Yeboah, Abena"
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Item Investigating Occupational Health and Safety of Workers on Selected Construction Sites in the Sunyani Municipality, Ghana(Journal of Safety Engineering, 2020-08-26) Nyantakyi, Emmanuel Kwesi; Obiri-Yeboah, Abena; Obeng-Ahenkora, Nana KwameThe administration of Health and Safety is an issue that is significant and pivotal to all organizations across all businesses worldwide. This integrates conventional and commercial businesses, data innovation (IT), care homes, schools, higher instructive teaching, travel and relaxation among others. The construction industry in the nation has always suffered due to hazardous working conditions. Occupational Health and safety is specifically significant and vital for the construction industry. The construction industry has a global reputation for the quality of work but, however, remains one of the most dangerous industries within the country. Contractors, subcontractors and their workforce quite frequently face varied risks from hazards which could result in injuries, other illnesses and even deaths in severe instances. This study investigated occupational health and safety on selected construction sites in the Sunyani Municipality in Ghana. Three different sets of questionnaires were distributed to and interviews conducted for consultants, contractors and construction workers in the Building Construction Industry. The focus of the interviews and questionnaires included accident origins, health and safety policy and management, factors affecting health and safety and reporting schedules. The results indicated that the factors responsible for most accidents on construction sites are workforce situations and management operations. It was also revealed that lack of PPE’s, technical guidance, training, safety knowledge and fatigue could seriously affect health and safety on construction sites either as one or in combination. The study recommended the enforcement of safety protocols on all construction sites and a progressively consistent and sustainable health and safety educational campaign programmes to enhance awareness of the negative implications of lack of health and safety procedures on site.Item Partial Replacement of Cement with Glass Bottle Waste Powder in Concrete for Sustainable Waste Management: A Case Study of Kumasi Metropolitan Assembly, Ashanti Region, Ghana(Journal of Civil Engineering Research, 2020) Nyantakyi, Emmanuel Kwesi; Obiri-Yeboah, Abena; Mohammed, Ghadafi AbdullaiThe objective was to investigate partial replacement of single and mixed coloured waste glass bottle powder for cement in concrete technology. Ordinary Portland cement in concrete mix was replaced with bottle glass waste powder of 30%, 50% and 70% respectively during mixing. A mix design ratio of 1:2:4 with water-to-cement ratio of 0.6 and design strength of 20MPa was used. Concrete cubes of sizes 150mmx150mmx150mm were cast and slump tested. Compressive strength density and percentage of water absorption test for concrete curing ages at 7- and 28-days were determined respectively. The slump test results showed decreasing slump values with increasing proportions of glass bottle waste powder. Further tests on the concrete specimen showed decreased compressive strength, density and percentage of water absorption values as glass bottle waste powder in concrete increased as compared to the control concrete mix. Replacement of glass bottle powder of 30% for cement in the concrete showed an enhanced performance when compared with the other percentage ratios used as well as the control mix. The study therefore recommends a 30% glass bottle waste powder to replace cement. The study recommends a study of the replacement over a longer period to verify the properties obtained.