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原文传递 Revised Pay Adjustment Factors for HMA and Concrete Pavements

题名：	Revised Pay Adjustment Factors for HMA and Concrete Pavements
作者：	Buddhavarapu, P.; Smit, A. F.; Prozzi, J. A.; Fan, W.; Gurmu, Z.
关键词：	Concrete pavements##Aggregates##Spalling##Field tests##Portland cements##Curing##Road materials##Performance evaluation##Durability##Predictions##Constructed facility##
摘要：	The Texas Department of Transportation (TxDOT) currently uses a pay adjustment factor (PAF) system for production and placement of hot mix asphalt (HMA) and ride quality of HMA and concrete pavements; this system has been in existence for almost a decade. Under the current PAF system, the reward or penalty to a contractor is based on whether a contractor exceeds or fails to meet the average contractor level of performance, which was calculated based on historical data reflecting an average contractors capabilities. As contractors have gotten increased experience with TxDOT projects, their average performance has also increased. Consequently, current PAFs are skewed, resulting in PAFs that are mostly greater than 1.0, with contractors being rewarded more often than penalized. A sound and rational pay adjustment system should aim to enforce strict quality control in pavement construction projects and should be independent of historical data. Furthermore, such a system should be developed based on the relationship between measurable parameters in a construction project and expected performance of the constructed facility such that the bonuses or penalties applied can be economically justified. It is necessary to revise the current pay adjustment system to ensure that bonuses awarded to contractors dont exceed the benefits to the highway agency, and that the penalties levied on contractors dont fall short of the potential losses incurred by the agency due to reduced service life as a result of poor workmanship. TxDOT needs to maintain a harmonious relationship with local construction contractors but at the same time assure consistently superior products. A rational performance-based pay adjustment system improves the contractual relationship by balancing the risks between TxDOT and contractors to benefit both parties in the long run.
总页数：	190
报告类型：	科技报告