A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance of Shoulder and Median Contrast Treatments
Color-contrast surface treatments and synthetic binder concrete, widely used in New York State to delineate shoulders and flush medians adjoining asphalt pavements, do not provide consistently good delineation and durability. A study was initiated to determine the degree of delineation provided and to identify causes of poor performance. Statewide, 97 surface treatments and 12 synthetic binder concretes were surveyed; wet-weather and night surveys were also completed on other projects near Albany. Construction was observed on 7 surface treatment projects. All surface treatments were generally found to provide poor delineation, especially at night and in wet weather. This was often related to color, size, and gradation of the cover aggregate, even when the treatments were in good condition. Poor durability was related to aggregate size and shape, and other factors. Delineation and durability may be improved by changing specifications for cover aggregate and revising those for construction. Synthetic binder concretes were generally found to be in good physical condition after up to 6 years, but the yellow color quickly faded to a dirty grey. Although good dry-day delineation was provided, night and wet-weather delineation were very poor.
Performance of Shoulder and Median Contrast Treatments
Color-contrast surface treatments and synthetic binder concrete, widely used in New York State to delineate shoulders and flush medians adjoining asphalt pavements, do not provide consistently good delineation and durability. A study was initiated to determine the degree of delineation provided and to identify causes of poor performance. Statewide, 97 surface treatments and 12 synthetic binder concretes were surveyed; wet-weather and night surveys were also completed on other projects near Albany. Construction was observed on 7 surface treatment projects. All surface treatments were generally found to provide poor delineation, especially at night and in wet weather. This was often related to color, size, and gradation of the cover aggregate, even when the treatments were in good condition. Poor durability was related to aggregate size and shape, and other factors. Delineation and durability may be improved by changing specifications for cover aggregate and revising those for construction. Synthetic binder concretes were generally found to be in good physical condition after up to 6 years, but the yellow color quickly faded to a dirty grey. Although good dry-day delineation was provided, night and wet-weather delineation were very poor.
Performance of Shoulder and Median Contrast Treatments
J. E. Bryden (author)
1979
34 pages
Report
No indication
English
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