Details:

Creators:
Cuelho, Eli ; Perkins, Steve ; Morris, Zachary
Cuelho, Eli ; Perkins, Steve ; Morris, Zachary Less -
Corporate Creators:
Western Transportation Institute
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Geogrids Geosynthetics Performance Tests Rutting Soil Stabilization Subgrade (Pavements) Tensile Strength Test Sections
Publication/ Report Number:
FHWA/MT-14-002/7712-251
DOI:
https://doi.org/10.21949/1518384
Resource Type:
Tech Report
Geographical Coverage:
Montana
Corporate Publisher:
Montana. Dept. of Transportation. Research Programs
Abstract:
Full-scale test sections were constructed, trafficked and monitored to compare the relative operational performance of geosynthetics used as subgrade stabilization as well as determine which material properties are most related to performance. Seventeen, 50-ft. long test sections were constructed – fourteen containing geosynthetic reinforcement and three without. A subgrade material was prepared and constructed to an average strength of 1.79 CBR with the exception of two reinforced test sections which were constructed to greater and lesser strengths in order to determine the effect subgrade strength had on the performance of the test sections. The test sections were constructed with an average base course thickness of 10.9 in. with the exception of two controls where the base thickness was intentionally increased to evaluate the effect of base thickness on test section performance. Information from the test sections that were purposely constructed with different subgrade strength and base course thickness were used to correct any variability in the remaining reinforced test sections. Test sections were trafficked using a 45-kip, 3-axle dump truck. Rut, displacement, strain, and pore-water pressure were monitored during trafficking. Post-trafficking excavations were conducted to evaluate damage to the geosynthetic, base contamination from the subgrade, and strength and deformation of the layers. Longitudinal rut was the primary indicator of performance. Geosynthetic material properties were used in a linear regression analysis to determine which properties best related to performance of the test sections in this study as well as test sections from Phase I. It was determined that the strength and stiffness of the junctions and tensile strength properties in the cross-machine direction correlated well with performance. The woven and non-Full-scale test sections were constructed, trafficked and monitored to compare the relative operational performance of geosynthetics used as subgrade stabilization as well as determine which material properties are most related to performance. Seventeen, 50-ft. long test sections were constructed – fourteen containing geosynthetic reinforcement and three without. A subgrade material was prepared and constructed to an average strength of 1.79 CBR with the exception of two reinforced test sections which were constructed to greater and lesser strengths in order to determine the effect subgrade strength had on the performance of the test sections. The test sections were constructed with an average base course thickness of 10.9 in. with the exception of two controls where the base thickness was intentionally increased to evaluate the effect of base thickness on test section performance. Information from the test sections that were purposely constructed with different subgrade strength and base course thickness were used to correct any variability in the remaining reinforced test sections. Test sections were trafficked using a 45-kip, 3-axle dump truck. Rut, displacement, strain, and pore-water pressure were monitored during trafficking. Post-trafficking excavations were conducted to evaluate damage to the geosynthetic, base contamination from the subgrade, and strength and deformation of the layers. Longitudinal rut was the primary indicator of performance. Geosynthetic material properties were used in a linear regression analysis to determine which properties best related to performance of the test sections in this study as well as test sections from Phase I. It was determined that the strength and stiffness of the junctions and tensile strength properties in the cross-machine direction correlated well with performance.
Content Notes:
Additional information may be found at: https://www.pooledfund.org/Details/Study/479
Format:
PDF
Alternate URL:
https://ntlrepository.blob.core.windows.net/lib/54000/54100/54160/MT_7712_project_summary-2.pdf
Funding:
MSU G&C #4W3850 ; MDT Project #7712
MSU G&C #4W3850 ; MDT Project #7712 Less -
Collection(s):
US Transportation Collection University Transportation Centers
Main Document Checksum:
[+]
urn:sha256:133e8c29d6e3c9335b4436fe9e529e35f3bc3751f93e442abf8802ada79c2626
Download URL:
https://rosap.ntl.bts.gov/view/dot/28177/dot_28177_DS1.pdf
File Type:

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