Articles by "Pavements"

Showing posts with label Pavements. Show all posts

Friday, June 17, 2016 , , ,
Howard Robinson ... 128 pages - Publisher: Smithers Rapra Press; (April 22, 2008)
Language: English - ISBN-10: 1859575072 - ISBN-13: 978-1859575079

Modifiers have been used to improve the performance of asphalt/aggregate mixtures for building roads for over the past hundred years and during that time the industry has evolved into a sophisticated sector that is heavily regulated by national and European standards.

The modifiers used take many different forms: polymers, latex, and many chemical additives. Determining how modifiers actually affect the performance of a mixture and establishing construction quality control procedures for these modifiers can be extremely difficult. In the past these difficulties have caused many specifying agencies to avoid the use of mixture modifiers when they could be of benefit to the performance of the road.

This review explores the type of polymers used in asphalt, why they are used, where they are used in terms of applications and the benefits they offer to industry and the road user. In particular, the reader will understand how polymers can be used to enhance the functionality of asphalt, that is to overcome deterioration mechanisms by enhancing asphalt stiffness or flexibility, or by making it more resistant to deformation (rutting) caused by traffic.

This review of polymers in asphalt is supported by an indexed section containing several hundred key references and abstracts selected from the Polymer Library. It is aimed at anyone who has an interest in polymers and their highway applications.
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Thursday, June 16, 2016 , , ,
Oliver C. Mullins, Eric Y. Sheu ... 
438 pages - Publisher: Springer; 1998 edition (December 31, 2013)
Language: English - ISBN-10: 1489916172 - ISBN-13: 978-1489916174

The investigative assault upon the enigmatic asphaltenes has recently resulted in sig­ nificant advances in many varied disciplines. Taken individually, each discipline exposes certain facets of asphaltenes, but each, alone, can never reveal asphaltenes from all van­ tages. Even seemingly narrowly focused issues such as the molecular structures of asphal­ tenes, or the colloidal structures of asphaltenes require a confluence of many lines of investigation to yield an understanding which differs from truth by diminishing uncer­ tainty. An holistic treatment of the asphaltenes is a powerful approach to evolve further their understanding. For example, examination of asphaltenes at the highest resolution yields molecular structure. A slight increase in scale probes asphaltene colloidal structure. Weaving together asphaltene studies performed at different length scales results in a fabric which envelops an encompassing vision of asphaltenes. At the same time, the interfaces of these hierarchical studies provide additional constraints on imagination, more than investi­ gations at individual length scales alone. These considerations shaped the timing, format, and the content of our book. The editors are very appreciative of the diligence and hard work manifest in each of the contributed chapters herein. We thank the contributing authors for making this project a success
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Wednesday, June 15, 2016 , , ,
Y. Richard Kim ... 460 pages - Publisher: McGraw-Hill Education; 1st edition (September 22, 2007)
Sold by: Amazon Digital Services LLC - Language: English - ASIN: B001EB5H7A

An Expert Guide to Developing More-Durable and Cost-Effective Asphalt Pavements: Written by distinguished experts from countries around the world, Modeling of Asphalt Concrete presents in-depth coverage of the current materials, methods, and models used for asphalt pavements.
Included is state-of-the-art information on fundamental material properties and mechanisms affecting the performance of asphalt concrete, new rheological testing and analysis techniques, constitutive models, and performance prediction methodologies for asphalt concrete and asphalt pavements. Emphasis is placed on the modeling of asphalt mixes for specific geographic/climatic requirements.

In light of America's crumbling infrastructure and our heavy usage of asphalt as a paving material, this timely reference is essential for the development of more-durable and cost-effective asphalt materials for both new construction and rehabilitation.

Harness the Latest Breakthroughs in Asphalt Concrete Technology: Asphalt Rheology • Constitutive Models • Stiffness Characterization • Models for Low-Temperature Cracking • Models for Fatigue Cracking and Moisture Damage • Models for Rutting and Aging.
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Sunday, January 10, 2016 , , ,
Gustav Martincek ... 440 pages - Publisher: CRC Press; (December, 1994) ... Language: English - ISBN-10: 0419181008 - ISBN-13: 978-0419181002

This book presents a rigorous treatment of the fundamental, mathematical behaviour of pavement structures under dynamic loading. The topic is of growing importance in economic design of aircraft runways and highway pavements. A range of modelling approaches are presented and compared with experimental data.
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Tuesday, November 17, 2015 , , , ,
American Society for Testing And Materials (ASTM) ...
265 pages - Publisher: ASTM International; (April 1, 2003)
Language: English - ISBN-10: 0803134614 - ISBN-13: 978-0803134614

Nineteen peer-reviewed papers address the latest issues affecting the resilient modulus test and use of the test results. Resilient modulus indicates the stiffness of a soil under controlled confinement conditions and repeated loading. The test is intended to simulate the stress conditions that occur in the base and subgrade of a pavement system. Papers cover: • Repeatability of the test by testing replicated test specimens under the same conditions. • Background of test startup and QC procedures • Review of the LTPP test program • Effect of water content and pore water pressure buildup on the resilient modulus of unsaturated and saturated cohesive soils • Importance of the value of resilient modulus on required pavement thickness This book is a valuable resource for highway engineers, geotechnical engineers, laboratory personnel who conduct pavement tests, pavement designers, and foundation engineers.
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Monday, September 07, 2015 , ,
Portland Cement Association (PCA) ...
150 pages - Publisher: Portland Cement Association (PCA); 2004
Language: English - ASIN: B000UGN17I

The growth of roller-compacted concrete pavement use in cold climate regions often is impeded by concerns regarding its ability to resist frost attack. Most published laboratory test results have indicated that the frost resistance and particularly the deicer salt-scale resistance of RCC are not always satisfactory. However, long-term field performance indicates that non-air entrainment RCC can be quite resistant to frost action. The report provides a comprehensive review on the current practices and recent developments in material selection and aggregate gradation, mixture design methods, production process and placement techniques. Improved construction techniques and recent developments in mixture design methods have resulted in stronger more durable RCC. Data shows that as little as 1.5% of spherical air bubbles can have a beneficial influence on the frost resistance durability of RCC. Test results indicate that ASTM C 1262 appears to be a reliable method of assessing the frost durability of RCC
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Monday, August 24, 2015 , , , ,
Patrick Lavin ... 462 pages - Publisher: CRC Press; (April, 2003) ... Language: English - ISBN-10: 0415247330 - ISBN-13: 978-0415247337.

Asphalt Pavements provides the know-how behind the design, production and maintenance of asphalt pavements and parking lots. Incorporating the latest technology, this book is the first to focus primarily on the design, production and maintenance of low-volume roads and parking areas. Special attention is given to determining the traffic capacity, required thickness and asphalt mixture type for parking applications. Topics covered include: material information such as binder properties, testing grading and selection; construction information such as mixing plant operation, proportioning, mixture placement and compaction; and design information such as thickness and mixture design methods and guidelines on applying these to highways, city streets and parking Areas. It is an essential practical guide aimed at those engineers and architects who are not directly involved in the asphalt industry, but who nonetheless need to have a good general knowledge of the subject. Asphalt Pavements provides a novice with enough information to completely design, construct and specify an asphalt pavement.
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Monday, August 24, 2015 , , , , ,
Mary Stroup-Gardiner ... 
161 pages - Publisher: ASTM; (June 2003)
Language: English - ISBN-10: 0803134606 - ISBN-13: 978-0803134607

Maximize the Quality and Longevity of any Highway Work: Ten peer-reviewed papers give you a timely look at HMA smoothness measurements, specifications, and equipment. Evidence shows that pavements constructed with low roughness measurements perform longer with fewer needed maintenance activities than pavements with a higher level of initial roughness. This collection of papers, written by industry experts, provides and overview of the current approaches to constructing smooth HMA pavements.
Three sections cover: State Agency Perspectives - provides insight into both the history of the development and the implementation of ride quality specifications for new hot mix asphalt pavements in Alabama, Arizona, New Jersey, Virginia, and Tennessee. These papers highlight the wide range of differences in equipment and approaches used to quantify HMA smoothness by state agencies across the country. This information will provide the readers with insight into complexities associated with developing and implementing ride quality specifications. National and International Perspectives - uses analysis of the Long Term Pavement Performance (LTPP) national pavement database to determine the effect of various construction alternatives on the smoothness of the final HMA surface. It also presents correlation equations that relate the traditional, but slow, method of measuring roughness with a hand-operated profilograph to that measured with the state-of-the-art vehicle-mounted. A second paper compares the use of six devices for measuring roughness on recently constructed Taiwan highways. This information will prove especially useful for agencies faced with assessing ride quality in confined urban areas. Equipment Comparisons, Materials Considerations, and Analyses - focuses on how various HMA mixtures, friction courses, and construction practices influence smoothness measurements and pavement quality; and compares the results obtained from an inclinometer profiler and a vehicle mounted profiler when used to test a wide range of HMA mixtures. Correlations between construction practices and their influence on roughness are also presented. It also discusses a new method for analyzing the raw profile obtained by a wide range of profilers. This analysis method can be used to improve data processing for any equipment that collects the raw profile.
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Wednesday, July 29, 2015 , , ,
Geoffrey Griffiths, Nick Thom ... 
192 pages
Publisher: CRC Press; 1st edition (June 18, 2007)
Language: English
ISBN-10: 0415254515
ISBN-13: 978-0415254519 

This comprehensive design guide summarizes current developments in the design of concrete pavements. Following an overview of the theory involved, the authors detail optimum design techniques and best practice, with a focus on highway and infrastructure projects.

Worked examples and calculations are provided to describe standard design methods, illustrated with numerous case studies. The author provides guidance on how to use each method on particular projects, with reference to UK, European and US standards and codes of practice.

Concrete Pavement Design Guidance Notes is an essential handbook for civil engineers, consultants and contractors involved in the design and construction of concrete pavements, and will also be of interest to students of pavement design.
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