Browsing by Author "Olaleye B.M"

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    Equipment Maintenance Management Audit of Some Granite Aggregate Quarries in Part of South - West Nigeria.
    (2016) Abdulraman S. O.; Olaleye B.M; Saliu M.A
    This paper analyses an existing maintenance management system in some selected typical granite aggregate quarries (represented as K1, K2 and K3) in part of South-west Nigeria using modified questionnaire and interview. The quarries' current maintenance management effectiveness was evaluated with respect to five basic elements of maintenance management. The quarries were rated in accordance with global best practices with credits/ points ranging from 1 to 3. Investigation shows that K1 and K2 had average overall ratings of 1.45 and 1.39 respectively. These scores fell below average performance, which informed their inability to operate at profit and call for urgent improvement decisions in all elements of maintenance management benchmarked. K3 scored 2.48, which indicates that the quarry adopts an effective maintenance management system, but will also need to improve on its preventive maintenance and maintenance scheduling. This paper is therefore an assessment initiative for maintenance and productivity continuous improvement and can be integrated as apart of a decision support system for maintenance management in the quarry industry.
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    Product Specification: A Critical Factor in Crushing Plant Design for Commercial Aggregate Quarries
    (2018) Abdulraman S.O.; Olaleye B.M
    Commercial quarries require prompt patronage for a better cash flow that will satisfy the prime objective of their establishment. Fonds and Pricey quarry is a 250T/H capacity quarry in Abuja and one of the many Nigerian quarries facing challenges of poor cash flow due to low sales with huge stockpiles of untradeable products. This unpleasant situation threatens the viability of a quarry business. This paper reviewed the production process and financial situation of F & P quarry with the view to revitalize the business through crushing plant process re-engineering to boost the quarry’s cash flow. Pareto analysis of the product sales was carried out and the complete sand making plant that would be amalgamated with the main crushing plant presented. This study showed that, most crushing plant designs give little or no consideration to crushed products demand and supply gap analysis; and there is a regional difference in the market potential for various quarry products, especially dust and 1/2”materials. A short and long term (models I and II) solutions were herein provided for old quarries facing similar business challenges and an improved crushing plant flow line for newly proposed aggregate quarries in Abuja that will guarantee better cash flow and consequent quick payback.