United States Department of Transportation
i
Further Development of Binder Quality Assurance Program [Project Summary]
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2006-08-31
[PDF-112.50 KB]
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Edition:Project Summary Report
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Abstract:The current Texas Department of Transportation (TxDOT) binder Quality Control/Quality Assurance (QC/QA) system uses two asphalt binder supplier categories: suppliers who have an approved quality control plan (QCP) on file with TxDOT and those who do not. Suppliers who maintain a current QCP can obtain approval to supply binders on either a monthly or a quantity basis, while for others, each load of asphalt must be tested for specification compliance. This binder QC/QA system has worked reasonably well until recently. A few binder supplier-grade combinations have experienced higher failure rates than in the past, and some TxDOT districts have had to resort to taking frequent field samples, as frequently as one per each transport load. Many TxDOT practitioners indicated that an approved binder source does not always provide acceptable quality binders. A more robust QC/QA system is needed to ensure a supply of binders that both meet specifications and maintain a consistent level of quality. This research project was launched to create a quality management system that utilizes the latest QC/QA principles by sharing the quality management burden between the supplier and the client TxDOT.
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