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oai:www.ideals.illinois.edu:2142/21878 2023-07-10 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Development of fatigue based pay adjustment factors in performance-related specifications for full-depth asphalt concrete pavements text Thompson, Marshall R. Patel, Arti Jivan 2011-05-07T13:21:57Z 2011-05-07T13:21:57Z 10000-01-01 1996 This research focused on the development of fatigue-based payment adjustment factors for use in performance-related specifications for full-depth asphalt pavements. A rational method of adjusting a contractor's payment as a function of the quality of the product is an essential element of a performance related specification (PRS). The Quality Control/Quality Assurance (QC/QA) specifications and practices in the highway industry for the construction of asphalt pavements were reviewed. The survey indicated that many hybrids of method related and end result specifications are being used by the states. Currently, no state is known to be utilizing a PRS for full-depth pavements. Details of the QC/QA program, testing and sampling frequencies, and payment adjustment schedules are presented. A review of extant performance prediction models indicated that additional research in developing quantifiable relationships between the key distresses in an AC pavement and contractor controlled material and construction (M&C) variables is necessary before a comprehensive PRS can be developed. However, satisfactory secondary relationships between the M&C variables (air voids, asphalt content, fines content and thickness) and fatigue cracking, a major structural distress, were identified. Fatigue failure is thought to be influenced not only by the mean values of the M&C factors but also by their variability. A computer simulation program was developed to examine the effect of deviations from target quality levels. The economic consequence of these deviations was examined by using a life-cycle costs strategy that included maintenance and user operating costs. A rational payment adjustment schedule was defined as one that would provide a mechanism by which pay adjustments could be established that would reflect the economic impact of contractor nonconformance to target quality levels. The pay factors developed are a function of the percent change in the anticipated present worth of the life-cycle costs of the as-constructed pavement compared to the as-designed pavement. Made available in DSpace on 2011-05-07T13:21:57Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9625179.pdf: 15397984 bytes, checksum: a8df83f2849f1dcdfbe9a27c5c81a490 (MD5) Previous issue date: 1996 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:53:48Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:24:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9625179 (UMI)AAI9625179 http://hdl.handle.net/2142/21878 eng Copyright 1996 Patel, Arti Jivan Engineering, Civil Civil and Environmental Engineering Civil Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.