Accelerated Weathering of Traffic Control Materials by Laboratory Testing

Elsafty, Adel; Hsuan, Yick (Grace); University of North Florida

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

i

Accelerated Weathering of Traffic Control Materials by Laboratory Testing

2020-02-01
By Elsafty, Adel ; Hsuan, Yick (Grace)

English

Details You May Also Like

Details:

Creators:

Elsafty, Adel ; Hsuan, Yick (Grace)

Elsafty, Adel ; Hsuan, Yick (Grace) Less -
Corporate Creators:

University of North Florida
Corporate Contributors:

Florida. Department of Transportation
Subject/TRT Terms:

[+]

Accelerated Tests Coatings Laboratory Accelerated Test Laboratory Tests Outdoor Exposure Retroreflectivity Sunlight Sunlight Degradation Traffic Control Devices Ultraviolet Radiation Weathering
Resource Type:

Tech Report
Geographical Coverage:

Florida ; United States

Florida ; United States Less -
Edition:

Final Report, February 2019 - February 2020
Corporate Publisher:

University of North Florida
Abstract:

This project was undertaken to identify the appropriate accelerated laboratory testing procedures and conditions for predicting weathering deterioration of coating materials for steel structures and retroreflective sign sheeting materials for traffic control. The current standard test methods specified by state transportation departments, FHWA, and manufacturers were reviewed. The effects of test parameters, including irradiance, temperature, moisture, chloride ion concentration, and exposure duration, were discussed. The correlation of various laboratory accelerated test methods with outdoor testing were evaluated and analyzed. The acceleration factors of different accelerated laboratory tests were calculated using the corresponding published test data. Test protocols for the coating materials and sign sheeting materials were recommended. For the coating materials, test conditions of ASTM D5894 were modified by increasing the UV irradiance, temperature, chloride ion concentration, and test duration to shorten the testing time to 10% of the outdoor exposure. For the sign sheeting materials, irradiance levels during xenon light-on periods of the test procedure according to ASTM D7869 were increased to accomplish the testing time of 16% of the outdoor testing duration.
Format:

PDF
Funding:

BE717
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:ca3699b35d9b16198d026001c30b678e9ab81e93c3164dfb187984ab3102a011
Download URL:

https://rosap.ntl.bts.gov/view/dot/56094/dot_56094_DS1.pdf
File Type:

[PDF-1.18 MB]