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- W595744539 abstract "The acceptance testing of Hot Mix Asphalt (HMA) conducted at the HMA production facility is an important portion of the overall acceptance process used by the Connecticut Department of Transportation (ConnDOT) for paving projects. In 2004, ConnDOT made the decision to implement a Quality Assurance (QA) approach to improve the quality of the construction of transportation facilities in the state. Until the 2009 paving season, ConnDOT had over 26 different Quality Assurance/Quality Control (QA/QC) criteria that HMA producers must meet (within limits) or face penalties, rejection of material or plant shutdown. In 2009, ConnDOT reduced the number of quality assurance metrics from 26 to 8 for the 2009 construction season. These eight metrics are: Va (Voids); VMA (Voids Mineral Agg); Gmm (Max Theoretical Gravity); Pb (Binder); and, four gradation control points (each mix has four control points that define the mix). The objective of this study was to statistically analyze HMA quality assurance data collected by ConnDOT from the 2007, 2008, 2009 and 2010 construction seasons to determine what impact the change in specifications had on the variability and overall quality of the mixes being produced. The results of this study indicate there is no overall statistically significant decrease in variability due to the 2009 specification changes. However, there is also no significant increase in variability due to the reduced testing. According to ConnDOT, these changes in specifications have eliminated costly plant shutdowns, a monetary savings to producers that will hopefully be passed down to ConnDOT in reduced pavement costs. Furthermore, the elimination of plant shutdowns will save ConnDOT and the traveling public costly project delays due to material not passing stringent quality assurance metrics, while not impacting the quality of pavement being placed." @default.
- W595744539 created "2016-06-24" @default.
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- W595744539 date "2012-11-01" @default.
- W595744539 modified "2023-09-23" @default.
- W595744539 title "Evaluating the impacts of reducing the number of hot mix asphalt plant testing acceptance criteria on mix variability." @default.
- W595744539 hasPublicationYear "2012" @default.
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