Relationship of Air Voids, Lift Thickness, and Permeability in Hot Mix Asphalt Pavements
Relationship of Air Voids, Lift Thickness, and Permeability in Hot Mix Asphalt Pavements

Author: E. Ray Brown

Publisher: Transportation Research Board

Published: 2004

Total Pages: 48

ISBN-13: 0309088070

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"TRB's National Cooperative Highway Research Program (NCHRP) Report 531: Relationship of Air Voids, Lift Thickness, and Permeability in Hot-Mix Asphalt Pavements provides guidance for hot-mix asphalt pavement construction designed to achieve satisfactory levels of in-place air voids and permeability. This guidance was developed from the findings of a research project that examined the relationship of air voids content to permeability and hot-mix asphalt lift thickness. The full finding of the research were published as NCHRP Web Document 68"--Publisher's description.

Modern Approaches To Quality Control
Modern Approaches To Quality Control

Author: Ahmed Badr Eldin

Publisher: BoD – Books on Demand

Published: 2011-11-09

Total Pages: 554

ISBN-13: 9533079711

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Rapid advance have been made in the last decade in the quality control procedures and techniques, most of the existing books try to cover specific techniques with all of their details. The aim of this book is to demonstrate quality control processes in a variety of areas, ranging from pharmaceutical and medical fields to construction engineering and data quality. A wide range of techniques and procedures have been covered.

The Roles of Accelerated Pavement Testing in Pavement Sustainability
The Roles of Accelerated Pavement Testing in Pavement Sustainability

Author: José P. Aguiar-Moya

Publisher: Springer

Published: 2016-09-15

Total Pages: 877

ISBN-13: 3319427970

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This compendium gathers the latest advances in the area of Accelerated Pavement Testing (APT), a means of testing full-scale pavement construction in an accelerated manner for structural deterioration in a very short term. Compiling novel research results presented at the 5th International Conference on Accelerated Pavement Testing, San Jose, Costa Rica, the volume serves as a timely and highly relevant resource for materials scientists and engineers interested in determining the performance of a pavement structure during its service life (10+ years) in a few weeks or months.

Investigation of Electromagnetic Gauges for Determining In-place HMA Density
Investigation of Electromagnetic Gauges for Determining In-place HMA Density

Author:

Publisher:

Published: 2007

Total Pages: 98

ISBN-13:

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Density is an important component of hot-mix asphalt (HMA) pavement quality and long-term performance. Insufficient density of an in-place HMA pavement is the most frequently cited construction-related performance problem. This study evaluated the use of electromagnetic gauges to nondestructively determine densities. Field and laboratory measurements were taken with two electromagnetic gauges-a PaveTracker and a Pavement Quality Indicator (PQ1). Test data were collected in the field during and after paving operations and also in laboratory on field mixes compacted in the lab. This study revealed that several mix-and project-specific factors affect electromagnetic gauge readings. Consequently, the implementation of these gauges will likely need to be done utilizing a test strip on a project- and mix-specific basis to appropriately identify an adjustment factor for the specific electromagnetic gauge being used for quality control and quality assurance (QC/QA) testing. The substantial reduction in testing time that results from employing electromagnetic gauges rather than coring makes it possible for more readings to be used in the QC/QA process with real-time information without increasing the testing costs.

Impact of Asphalt Thickness on Pavement Quality
Impact of Asphalt Thickness on Pavement Quality

Author: Rebecca S. McDaniel

Publisher:

Published: 2019

Total Pages: 120

ISBN-13: 9780309480420

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TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 537: Impact of Asphalt Thickness on Pavement Quality documents transportation agency policy for lift thickness and minimum compaction requirements on resultant asphalt pavement quality. To achieve expected pavement performance, it is important that asphalt concrete (AC) have adequate density. A critical factor in achieving this density is the ratio of lift thickness to nominal maximum aggregate size (t/NMAS). The information in the report is designed to help make agencies aware of a range of practices other agencies use to achieve a desired t/NMAS ratio, ensuring that density of AC is adequate to meet expected pavement performance.