Aging

Aging
Author: Chris A. Bell
Publisher:
Total Pages: 104
Release: 1994
Genre: Social Science
ISBN:

This research was conducted as part of the Strategic Highway Research Program (SHRP) A-003A contract at Oregon State University to validate the findings of SHRP contracts A-002A and A-003B with regard to aging. One short-term and four long-term aging methods were used to simulate aging of asphalt-aggregate mixes in the field. Four aggregates and eight asphalts for a total of 32 different material combinations were tested using the different aging methods. Results of the aging studies are compared with the A-002A and A-003B studies of asphalt binder or asphalt mixed with fine aggregate. This research concludes that aging of asphalt mixes cannot be predicted by tests on asphalt binder alone since results show that aggregates have considerable influence on aging.

Advanced Asphalt Materials and Paving Technologies

Advanced Asphalt Materials and Paving Technologies
Author: Zhanping You
Publisher: MDPI
Total Pages: 431
Release: 2018-05-04
Genre: Technology & Engineering
ISBN: 3038428892

This book is a printed edition of the Special Issue "Advanced Asphalt Materials and Paving Technologies" that was published in Applied Sciences

Water Sensitivity of Asphalt-aggregate Mixes

Water Sensitivity of Asphalt-aggregate Mixes
Author: Ronald L. Terrel
Publisher: National Research Council
Total Pages: 204
Release: 1994
Genre: Technology & Engineering
ISBN:

The research presented in this report was conducted to identify the important factors influencing the water sensitivity of asphalt paving mixtures, and to develop a test method to evaluate water sensitivity of asphalt concrete mixtures for mix design. The test method was to be performance related. A review of current procedures revealed that no single method was suitable for evaluation and related to field performance. Based on a hypothesis that air voids in the mixture may be the major source and cause of water damage, a test system was developed to evaluate the major factors that influence water sensitivity. The Environmental Conditioning System (ECS) was used to develop a test procedure that includes specimen preparation; measurement of permeability using air, water, or both; vacuum wetting; cycling at various temperatures; and continuous repeated loading while monitoring resilient modulus after each conditioning cycle.

Proceedings of the 5th International Symposium on Asphalt Pavements & Environment (APE)

Proceedings of the 5th International Symposium on Asphalt Pavements & Environment (APE)
Author: Marco Pasetto
Publisher: Springer Nature
Total Pages: 507
Release: 2019-08-29
Genre: Science
ISBN: 3030297799

This volume highlights the latest advances, innovations, and applications in the field of asphalt pavement technology, as presented by leading international researchers and engineers at the 5th International Symposium on Asphalt Pavements & Environment (ISAP 2019 APE Symposium), held in Padua, Italy on September 11-13, 2019. It covers a diverse range of topics concerning materials and technologies for asphalt pavements, designed for sustainability and environmental compatibility: sustainable pavement materials, marginal materials for asphalt pavements, pavement structures, testing methods and performance, maintenance and management methods, urban heat island mitigation, energy harvesting, and Life Cycle Assessment. The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster multidisciplinary collaboration among different specialists.

Moisture Damage in Asphalt Concrete

Moisture Damage in Asphalt Concrete
Author: Russell G. Hicks
Publisher: Transportation Research Board
Total Pages: 104
Release: 1991
Genre: Technology & Engineering
ISBN: 9780309049245

This synthesis will be of interest to pavement designers, construction engineers, maintenance engineers, and others interested in avoiding or limiting moisture damage in asphalt concrete. Information is provided on physical and chemical explanations for moisture damage in asphalt concrete, along with a discussion of current practices and test methods for determining or reducing the susceptibility of various asphalt concrete components and mixtures to such damage. Moisture damage in asphalt concrete is a nationwide problem which often necessitates premature replacement of highway pavement surfaces. This report of the Transportation Research Board describes the underlying physical and chemical phenomena responsible for such damage. Current test methods used to determine the susceptibility of asphalt concretes, or their constituents, to moisture damage are described and evaluated. Additionally, current practices for minimizing the potential for moisture damage are examined.