Department of Building

Permanent URI for this community

https://ir.unilag.edu.ng/handle/123456789/3566

Browse

Browsing Department of Building by Subject "Building"

Now showing 1 - 3 of 3
  • Item
    Open Access
    Assessment of the correlation between the quality of building materials and strength of concrete members in the building
    (International Journal of Applied Engineering Research, 2018) Ameh, J.O; Ogunde, A.O; Egbanubi, K.C; Joshua, O
    The constituents of concrete have a significant amount of influence on the strength of concrete. Consequently, this research work addressed the use of compressive strength test to determine concrete strength. To achieve the aim, experiments were carried out on three different aggregate sizes-19mm, 16mm, and 13.2mm. The results showed the silt percent contained in each tested aggregate, 3% for fine aggregate, 1% for 13.2mm aggregate, and 0.05% for both 16mm and 19mm aggregate size. It also showed the moisture percent contained in the fine aggregate sample was 2.56%, the workability of the tested concrete of mix ratio1: 1 1 2 2 was 0.95, the Impact Value (toughness) of the aggregates; 9.01% for the 13.2mm size, 7.13% for the 16mm, and 7.95% for the 19mm size of aggregate. The compressive strength test showed that the 19mm size aggregate had the highest strength after each seven days. For the test on concrete members (column), Schmidt hammer test was carried out to determine the strength and variation in the workmanship of each tested column. The result of this research work showed that the 19mm aggregate had the most strength; and that the aggregate sizes influence the strength of the concrete. The research also showed that for each concrete member there is high variation in strength due to variation in workmanship. It is recommended that columns should be tested periodically for variation in strength to avoid building collapse.
  • Item
    Open Access
    Labour Output of Steel Fixers in Selected Building Construction Sites in Lagos, Nigeria
    (Journal of Applied Sciences & Environmental Sustainability, 2013) Ameh, O. J.
    This study investigates labour output of steel fixers in in-situ concrete storey building construction on some selected sites in Lagos state. The main aim of the study are to aid the estimation of labour cost of steel works in reinforced concrete construction and to provide information for planning and schedule of work. Data were collected from twenty (20) construction sites through work study and activity sampling. The investigation reveals that a proficient steel fixer, averagely motivated is capable of cutting and bending one tonne of steel using simple hand tools for beams, columns, stairs and floor slabs for 27.05hrs, 24.10hrs, 26.06hrs. and 41.58 hours respectively. He is also capable of tying one tonne of steel rods into the same structural elements aforementioned for 45.06hrs, 35.20hrs, 25.10hrs, and 67.70hours respectively. Furthermore, steel fixers use 75.1% of their working time effectively while 24.9% of same is used ineffectively. It was recommended that labour output obtained be adapted as local substitute for the British Standard labour rate currently in use.
  • Item
    Open Access
    Maintenance management sourcing strategies and the condition of tertiary institution buildings in Lagos and Ogun states, Nigeria.
    (Ethiopian Journal of Environmental Studies and Management, 2017-02) Faremi, O.; Adenuga, O.; Ameh, J.
    In the face of the deplorable state of buildings across the various tertiary institutions in Nigeria, the need to deploy appropriate maintenance management strategy cannot be overemphasized. However, sourcing decision for maintenance services remains a tough one for decision makers as different sourcing option suit different scenario. this study examines maintenance sourcing strategy used in tertiary institutions and investigates the extent to which the physical and functional conditions of buildings are determined by the choice of maintenance strategy. A survey of fifteen tertiary institutions in Lagos and Ogun states, Nigeria was conducted. structured questionnaire were administered to seventy-five respondents comprising maintenance staff and users of tertiary institution buildings within the study area. A total of fifty-six (56) questionnaires were found to be dully completed and useful, representing 75% response rate. descriptive and inferential statistical tools including, frequency table, mean and independent sample T-test were employed to analyze collected data. The results revealed that out of the thirty (30) maintenance services investigated, thirteen (13) and seventeen (17) maintenance services had better physical and functional condition under insourced and outsourced maintenance strategies respectively. Also, there was no significant difference in the physical and functional conditions of tertiary institution buildings maintained through insourcing and outsourcing maintenance strategies. The study recommends various building elements and services that could be maintained under the insourcing and outsourcing maintenance management strategies respectively.