Download or read book Assessment of Nondestructive Testing Technologies for Quality Control Quality Assurance of Asphalt Mixtures written by Shibin Lin and published by . This book was released on 2015 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt pavements suffer various failures due to insufficient quality within their design lives. The American Association of State Highway and Transportation Officials (AASHTO) Mechanistic-Empirical Pavement Design Guide (MEPDG) has been proposed to improve pavement quality through quantitative performance prediction. Evaluation of the actual performance (quality) of pavements requires in situ nondestructive testing (NDT) techniques that can accurately measure the most critical, objective, and sensitive properties of pavement systems. The purpose of this study is to assess existing as well as promising new NDT technologies for quality control/quality assurance (QC/QA) of asphalt mixtures. Specifically, this study examined field measurements of density via the PaveTracker electromagnetic gage, shear-wave velocity via surface-wave testing methods, and dynamic stiffness via the Humboldt GeoGauge for five representative paving projects covering a range of mixes and traffic loads. The in situ tests were compared against laboratory measurements of core density and dynamic modulus. The in situ PaveTracker density had a low correlation with laboratory density and was not sensitive to variations in temperature or asphalt mix type. The in situ shear-wave velocity measured by surface-wave methods was most sensitive to variations in temperature and asphalt mix type. The in situ density and in situ shear-wave velocity were combined to calculate an in situ dynamic modulus, which is a performance-based quality measurement. The in situ GeoGauge stiffness measured on hot asphalt mixtures several hours after paving had a high correlation with the in situ dynamic modulus and the laboratory density, whereas the stiffness measurement of asphalt mixtures cooled with dry ice or at ambient temperature one or more days after paving had a very low correlation with the other measurements. To transform the in situ moduli from surface-wave testing into quantitative quality measurements, a QC/QA procedure was developed to first correct the in situ moduli measured at different field temperatures to the moduli at a common reference temperature based on master curves from laboratory dynamic modulus tests. The corrected in situ moduli can then be compared against the design moduli for an assessment of the actual pavement performance. A preliminary study of microelectromechanical systems- (MEMS)-based sensors for QC/QA and health monitoring of asphalt pavements was also performed.

Download or read book NDT Technology for Quality Assurance of HMA Pavement Construction written by Harold L. Von Quintus and published by Transportation Research Board. This book was released on 2009 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program

Download or read book Qualify High Frequency GPR for Asphalt Mixture Construction written by Bryan T. Wilson and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This product is a PowerPoint Presentation based on TxDOT Project 0-6874 Develop Nondestructive Rapid Pavement Quality Assurance / Quality Control Evaluation Test Methods and Supporting Technology. The goals are: 1. Demonstrate shadow QA on projects 2. Perform lab sensitivity analysis 3. Explore forensic applications 4. Develop test procedure.

Download or read book Develop Rapid Quality Control and Assurance Technologies for Pavements written by William W. Crockford and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project expanded on the technology readiness of three non-destructive tools for potentially enhancing quality inspection, asset management, or forensic investigations in flexible pavements. These tools included mechanics-based models for base course, compaction monitoring system (CMS) for asphalt mixture process control, and ground penetrating radar (GPR) for asphalt mixture construction quality assessment. The mechanics-based models showed good promise for measuring density and moisture content of the base course. Results showed estimating flexible base course modulus at a controlled test site tracked reasonably with the falling weight deflectometer (FWD) with an average error of about 14 ksi or less. The mechanics-based models did not work well on non-plastic base layers. On new pavements, the FWD shows more variability than the modulus predictions from mechanics-based results. The CMS provides real-time feedback of the adequacy of breakdown roller coverage, but the concept to estimate mat density from the CMS proved quite complex. Even after development of revised model factors, the ability of the CMS to estimate density is limited. The best potential use of the CMS is likely in process control to provide continuous feedback with far more testing coverage than routine use of a density gauge. The use of GPR for measuring asphalt mixture density has a high technology readiness. Applications in both construction and forensic settings show strong potential, and this tool should be viable for some form of implementation.

Download or read book Proceedings Quality control techniques written by and published by . This book was released on 1965 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quality control techniques written by and published by . This book was released on 1965 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effectiveness Comparison of TxDOT Quality Control quality Assurance and Method Specifications written by Mansour Solaimanian and published by . This book was released on 1998 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This purpose of this study was to evaluate the quality of the hot mix asphalt concrete produced under quality control/quality assurance (QC/QA) specification item 3063. During the first phase of this project, conducted between September 1996 and February 1997, an extensive amount of technical information and numerical information was gathered and analyzed. During the second phase of this project, various other activities were carried out, including a survey of other states to assess their approach in developing and implementing QC/QA specifications, a physical survey of QC/QA and non-QC/QA specification projects in Texas, and a limited evaluation of the cost of the projects. This report presents the results, findings, conclusions, and recommendations based on the collected information and on the work performed during the course of this research program.

Download or read book Asphalt Pavements written by Y. Richard Kim and published by CRC Press. This book was released on 2014-05-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt Pavements contains the proceedings of the International Conference on Asphalt Pavements (Raleigh, North Carolina, USA, 1-5 June 2014), and discusses recent advances in theory and practice in asphalt materials and pavements. The contributions cover a wide range of topics: - Environmental protection and socio-economic impacts - Additives and modifiers for asphalt concrete - Maintenance and rehabilitation - Experimental characterization of asphaltic materials - Life cycle cost analysis/modeling of compaction in the laboratory and in the field - Perpetual pavements - Pavement management systems - Sustainable asphalt technologies - Nondestructive testing of asphalt pavement - Pavement condition survey/pavement smoothness/quality control/quality assurance - Microstructural characterization and micromechanics of asphaltic materials - Long-term pavement performance prediction - Mineral aggregate in asphalt concrete/mix design methodology/novel methods to aid mix design - Warm mix asphalt technologies - Innovative pavement analysis and design - Pavement response analysis under static and moving wheel loads - Recycling - Modeling of asphaltic materials and pavements - Microstructural characterization and micromechanics of asphalt materials - Asphalt pavement and environment - Performance-related specifications Asphalt Pavements will be of interest to academics and professional involved in asphalt engineering.

Download or read book Materials Evaluation written by and published by . This book was released on 1993 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Financial Justification of Nondestructive Testing written by Emmanuel P. Papadakis and published by CRC Press. This book was released on 2007 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description

Download or read book Evaluation of Non destructive Density Determination for QA QC Acceptance Testing written by David Mata (P.E.) and published by . This book was released on 2018 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings written by and published by . This book was released on 1965 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statistical Assessment of Quality Assurance quality Control Data for Hot Mix Asphalt written by and published by . This book was released on 2009 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by and published by . This book was released on 2008 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quality Assurance Specification Review for Hot Mix Asphalt and Structural Concrete written by Chuck E. Hughes and published by . This book was released on 2000 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report includes three parts: (1) Final Report for Quality Assurance Specifications Review dated May 2000; (2) Addendum to the Final Report dated December 2000; and (3) Draft Construction Manual and Inspection Guidelines dated May 2000. The study tasks included a detailed analysis of the quality assurance (QA) special provision, evaluation of Department and Contractors risks, examination of practice of using Contractors tests results for acceptance, guidelines for effective use of QA specifications by field inspection staff, need for adjustments to material specification limits, interviews with Department and Contractor personnel and the impact of recommended changes to the Contractors.

Download or read book An Assessment of WSDOT s Hot mix Asphalt Quality Control and Assurance Requirements written by Kim A. WIlloughby and published by . This book was released on 2007 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Based Field Quality Control Quality Assurance for Asphalt Aggregate Mixes written by MG. Bouldin and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arizona Department of Transportation in its continuing effort to improve pavement technology evaluated the use of the repetitive simple shear test at constant height and flexural bending beam test as part of the mix design and field quality assurance process. The results of the efforts, indicated that the use of those performance based tests and associated analysis procedures are feasible and implementable for routine use.