Rational Characterization of Pavement Structures Using Deflection Analysis: Research results & findings
Rational Characterization of Pavement Structures Using Deflection Analysis: Research results & findings

Author:

Publisher:

Published: 1988

Total Pages: 256

ISBN-13:

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In this study, a rational overlay design method for flexible pavements in Arizona has been developed which includes roughness, fatigue and plastic deformation models. The method is incorporated in a microcomputer program which is also capable of analyzing the economics of other rehabilitation alternatives. During the development of the method, twenty in-service pavement sites were selected from Arizona highways covering various geographical and environmental regions, soil types, pavement conditions and traffic volumes. nondestructive tests (NDT) were performed on these sites using the Falling Weight Deflectometer at three stress levels as well as the Dynaflect. The pavement layers and subgrade moduli were backcalculated from NDT data using both static and dynamic analyses. The moduli of asphaltic layers were further adjusted for temperature. Statistical analysis was performed and the stress sensitivity was found to be small. Cone Penetration tests were further performed to verify the subgrade moduli. Asphalt concrete cores, base and subbase samples and undisturbed subgrade materials. In addition, base and subbase gradation as well as soil classification and Atterberg limits were obtained. The study expanded the data base for material properties in Arizona. This volume is the first in a three volume set. Volume II provides field testing procedure and workstation development and Volume III is a computer user guide.

Pavement Engineering
Pavement Engineering

Author: Rajib B. Mallick

Publisher: CRC Press

Published: 2013-03-27

Total Pages: 697

ISBN-13: 1439870357

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Pavements are engineered structures essential to transportation, commerce and trade, and everyday life. In order for them to perform as expected, they must be designed, constructed, maintained, and managed properly. Providing a comprehensive overview of the subject, Pavement Engineering: Principles and Practice, Second Edition covers a wide range of topics in asphalt and concrete pavements, from soil preparation to structural design and construction. This new edition includes updates in all chapters and two new chapters on emerging topics that are becoming universally important: engineering of sustainable pavements and environmental mitigation in transportation projects. It also contains new examples and new figures with more informative schematics as well as helpful photographs. The text describes the significance of standards and examines traffic, drainage, concrete mixes, asphalt binders, distress and performance in concrete and asphalt pavements, and pavement maintenance and rehabilitation. It also contains a chapter on airport pavements and discusses nondestructive tests for pavement engineering using nuclear, deflection-based, electromagnetic, and seismic equipment. The authors explore key concepts and techniques for economic analysis and computing life-cycle cost, instrumentation for acquiring test data, and specialty applications of asphalt and concrete. The Second Edition includes more relevant issues and recently developed techniques and guidelines for practical problems, such as selection of pavement type, effect of vehicle tires, and use of smart sensors in rollers and software for drainage analysis. This book presents in-depth, state-of-the-art knowledge in a range of relevant topics in pavement engineering, with numerous examples and figures and comprehensive references to online resources for literature and software. It provides a good understanding of construction practices essential for new engineers and materials processing and construction needed for solving numerous problems.

Rational Structural Design of Highway/Airport Pavements
Rational Structural Design of Highway/Airport Pavements

Author: Dindial Ramsamooj

Publisher: AuthorHouse

Published: 2014-07-03

Total Pages: 283

ISBN-13: 1491850086

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Rational design theories for highway and airport pavements are presented together with an invention of a much superior paving material, comprising recycled Ethylene Vinyl Acetate (EVA) mixed and compacted with graded aggregates. EVA is the binder (cheaper than asphalt), and the new paving material, called EVAPAVE, is four times stronger and tougher than asphalt concrete, and twice as strong and tough as high quality cement concrete. Fracture mechanics is used for determining the fatigue life of the pavement AC surface, while the stress-dilatancy theory is used for the rutting of the pavement. The theories are then combined to obtain the interaction of fatigue and rutting. Several examples are presented to illustrate the design methodology. The new pavement will not require joints and will not have bumps or depressions and will be the smoothest riding pavement, with huge savings in construction and maintenance and in vehicular fuel and maintenance costs, estimated to exceed $10 billion per year in the U.S. alone. Its fatigue life will outlast any other pavement by more than seven times.