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This volume presents the Appendices A through I. Appendix A contains the feasibility study of the consequences of maintenance and repair. Appendix B is an input guide to and flow chart of the PCI-1 computer program which calculates the pavement condition index (PCI). Appendix C contains the development of the environmental zones. Appendix D shows the questionnaires used on visits to Air Force Bases. Appendix E summarizes all PCI data collected in FY77. Appendix F presents the correlation study of PCI and profile roughness. Appendix G contains the information concerning maintenance and repair of features presented to the engineers attending the workshop. Appendix H describes an economic analysis procedure considering pavement performance. Appendix I contains the weighted performance questionnaires also presented at the workshop. (Author).
This report describes the development of guidelines for determination of maintenance and repair (M and R) needs of airfield pavements. The guidelines are based on the pavement condition index (PCI) and other condition indicators, including rate of deterioration, cause of deterioration, load carry capacity, skid resistance/hydroplaning, surface roughness, and extent of previous M and R. The M and R methods were divided into three general categories: routine, major, and overall. The mean pavement PCI was found to relate strongly to M and R needs represented by these three M and R categories. M and R zones for use in selecting the appropriate M and R category were established based on the mean pavement PCI. Other condition indicators are used to further aid in the selection of feasible M and R alternatives. Recommended M and R methods for the different distress types and severity levels were developed. Economic analysis procedures were developed for comparing M and R alternatives. The airfield pavement condition survey and rating procedures have been successfully field-tested. Performing the condition survey according to these procedures does not require expensive equipment; only a measuring wheel and straightedge are required. The results can be used to rate pavement condition and to select M and R requirements for all pavement features of the airfield.
Statistical prediction models for pavement condition index (PCI) and key distresses have been developed for asphalt and jointed concrete pavements. The models were developed based on field data collected during FY76 through FY78 from 19 airfields throughout the United States. The field data included traffic, climate, pavement structure and material properties, and previous maintenance. Prediction models were developed for concrete and asphalt pavements, respectively. These models represent the first iteration of the consequence models needed to help pavement engineers select the most economical maintenance and repair (M & R) strategies and to help management efficiently allocate repair funds. Two workshops were held to determine information required by Air Force Command and Base engineers to efficiently manage airfield pavement M & R. The workshops were attended by many Command and Base engineers, as well as representatives from the Air Force Design Center and the Directorate of Management Systems. Computer and information requirements were defined and implementation alternatives for a computer-aided pavement management system were developed as a result of these workshops. (Author).
This report documents development of the Airfield Pavement Management System (APMS), a computerized system for analyzing airfield pavements. The system provides: (1) a method for determining feasible maintenance and repair (M & R) alternatives for a given pavement feature, (2) a procedure for performing economic analyses to compare various M & R alternatives for a given pavement feature, and (3) a procedure for forecasting the Pavement Condition Index and key distresses as a consequence of applying an M & R alternative to a particular pavement feature. APMS now consists of seven modules designed to: (1) perform evaluation summary, (2) perform localized repair analysis, (3) evaluate the consequences of localized repair, (4) evaluate the consequences of other M & R, (5) perform cost analysis, (6) perform benefit analysis, and (7) perform budget optimization. (Author).
The Air Force has for several years been actively engaged in the development of a Pavement Maintenance Management System. The first accomplishment of this study was the development of improved procedure for determining the relative condition of airfield pavements. These improved procedures are presented in detail in this report. These procedures were developed during FY 75 and 76 and validated by field tests during FY 76 and 77. Two conferences, attended by Command Pavement Engineers from all Major Commands, have been held at Tyndall AFB, Florida (30 Nov - 2 Dec 1976, 18 - 20 October 1977), to discuss and revise these procedures. It was the consensus of the attendees at these conferences that these procedures provided vastly improved methods for determining the relative condition of airfield pavements. Thus, CEEDO was requested, during the conference held in October 1977, to publish, in some form, instructions for the use of these procedures as soon as possible. As a result this technical report is being published in the same format as that used for Chapter 3, 'Airfield Pavement Condition Survey Report, ' AFR 93-5. The Air Force Civil Engineering Center (AFCEC), at Tyndall AFB, Florida, has the responsibility for revising AFR 93-5. It is recommended that the information presented in this report be used as a basis for revision of Chapter 3, AFR 93-5. (Author).