TY - JOUR
T1 - Field factors impacting incentives of quality control for performance (QCP) and pay for performance (PFP) specifications for hot-mix asphalt in Illinois
AU - Rivera-Perez, Jose
AU - Huang, John
AU - Al-Qadi, Imad L.
N1 - Publisher Copyright:
© 2022 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2023
Y1 - 2023
N2 - Illinois Department of Transportation (IDOT) developed two HMA pay specifications, quality control for performance (QCP) and pay for performance (PFP). These specifications assign pay incentives and/or disincentives based on air voids, voids in mineral aggregate, and in-place density. The paper investigated the pay disincentive sources in QCP and PFP projects. Eleven construction contracts were evaluated during the 2018 construction season. First, on-site field observations of contracts were conducted to HMA production, construction, sampling, coring, and testing procedures. Then quality acceptance data were analyzed. Results indicate mix production, and construction issues were the main cause of pay disincentives to the contractors. The production issues found were related to aggregate quality, handling, variability, and contamination as well uncontrolled mix switches. However, there were cases that which testing issues compromised the contractor’s pay. The issues observed included: sample reheating, lab-gyratory compaction bias, and inconsistent volumetric test weights.
AB - Illinois Department of Transportation (IDOT) developed two HMA pay specifications, quality control for performance (QCP) and pay for performance (PFP). These specifications assign pay incentives and/or disincentives based on air voids, voids in mineral aggregate, and in-place density. The paper investigated the pay disincentive sources in QCP and PFP projects. Eleven construction contracts were evaluated during the 2018 construction season. First, on-site field observations of contracts were conducted to HMA production, construction, sampling, coring, and testing procedures. Then quality acceptance data were analyzed. Results indicate mix production, and construction issues were the main cause of pay disincentives to the contractors. The production issues found were related to aggregate quality, handling, variability, and contamination as well uncontrolled mix switches. However, there were cases that which testing issues compromised the contractor’s pay. The issues observed included: sample reheating, lab-gyratory compaction bias, and inconsistent volumetric test weights.
KW - Hot-mix asphalt
KW - PWL
KW - quality assurance
KW - quality control
KW - statistical quality control
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U2 - 10.1080/14680629.2022.2075787
DO - 10.1080/14680629.2022.2075787
M3 - Article
AN - SCOPUS:85130210578
SN - 1468-0629
VL - 24
SP - 1425
EP - 1439
JO - Road Materials and Pavement Design
JF - Road Materials and Pavement Design
IS - 6
ER -