Re-evaluation of Potential Vertical Rise Design Procedures
Author(s):
R.L. Lytton, C. Aubeny, R. Bulut
Publication Date:
July 2005
Abstract:
The Texas Department of Transportation (TxDOT), beginning in the 1980s, sponsored several years of monitoring activity on pavements built on expansive clay subgrades. Field observations and measurements of subgrade moisture and pavement profiles were made as the test sections became rougher with time and traffic. The test sections were representative of all the moisture climatic zones across Texas.
Profile analysis and modeling were done at the Texas Transportation Institute. Laboratory testing and data analysis were done by researchers at Texas A&M University, Texas Tech University, and The University of Texas at EI Paso. This project was performed to determine whether the current potential vertical rise (PVR) pavement design procedures could be updated to reflect results of the monitoring.
The principal problems with pavements on expansive soils are that they swell and shrink, both of which cause the pavement to become rougher.
Report Number:
0-4518-S
Electronic Link(s):
Document/Product
http://tti.tamu.edu/documents/0-4518-S.pdf
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