ECONOMIC EVALUATION OF PAVEMENT OVERLAY DESIGN STRATEGIES (KADUNA-ABUJA ROAD AS A CASE STUDY)

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dc.contributor.authorADEGBESAN, JOSEPH FOLORUNSO
dc.date.accessioned2015-01-16T10:40:22Z
dc.date.available2015-01-16T10:40:22Z
dc.date.issued1989-08
dc.descriptionA THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN CIVIL ENGINEERING DEPARTMENT OF CIVIL ENGINEERING FACULTY OF ENGINEERING AHMADU BELLO UNIVERSITY ZARIA, NIGERIA AUGUST, 1989en_US
dc.description.abstractABSTRACT There are two main phases to this work. The first dealt with the overlay thickness design while the second considered economic appraisal of overlay design strategies. Pavement overlay design on Kaduna - Abuja road was carried out based on elastic layer and traffic estimate theories, as well as field and -Laboratory observations. The road was statistically divided into 8 homogenous sections. A computer program 'LAYER 5' was developed and used for the calculation of horizontal and vertical strain, vertical stress and fatigue remaining life of the pavement based on Odemark, Burminster and Boussinesq equations. The economic appraisal of the design was based on a cost model that considers all costs incurred over a period of 20 years. A total of 10 strategies involving design periods ranging from 2 years to 20 years at an incremental rate of 2 years were considered for the different thicknesses of the overlays. Relationships were developed for both the maintenance and users costs as functions of overlay thickness and design period. All cost items were subjected to sensitivity analyses. (vi) The results of the economic appraisals showed that those strategies that require frequent overlays are more expensive than these with fewer overlays. However, differences in total costs diminish as from the design period of 14 years onwards. Also, it was found that on the basis of present physical conditions of the road, the stretch spanning 2,3km - 8.0 km from Kaduna is the strongest. (viien_US
dc.identifier.urihttp://hdl.handle.net/123456789/5851
dc.language.isoenen_US
dc.subjectECONOMIC EVALUATIONen_US
dc.subjectPAVEMENTen_US
dc.subjectOVERLAYen_US
dc.subjectDESIGNen_US
dc.subjectSTRATEGIESen_US
dc.subject(KADUNA-ABUJA ROADen_US
dc.titleECONOMIC EVALUATION OF PAVEMENT OVERLAY DESIGN STRATEGIES (KADUNA-ABUJA ROAD AS A CASE STUDY)en_US
dc.typeThesisen_US
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