CONSTRUCTION AND INSTRUMENTATION OF GEOSYNTHETICALLY STABILIZED SECONDARY ROAD TEST SECTIONS

Nine instrumented flexible pavement test sections were constructed in a rural secondary road in southwest Virginia. The nine test sections, each 15 m (50 ft) long, were built to examine the effects of geogrid and geotextile stabilization. Three test sections were constructed with a geogrid, three were built with a geotextile, and three were nonstabilized. The test section base course thicknesses ranged from 10.2 cm (4.0 in.) to 20.3 cm (8.0 in.), and the hot mix asphalt (HMA) thickness averaged 8.9 cm (3.5 in.). Geosynthetic stabilization was placed on top of the subgrade layer. The pavement test sections were heavily instrumented with two types of pressure cells, soil and HMA strain gauges, thermocouples, and soil moisture cells. In addition, strain gauges were installed directly on the geogrid and geotextile. An extensive instrumentation infrastructure was constructed to locate all instrumentation, cabling, and data acquisition facilities underground. Instrument survivability has ranged from 6% for the strain gauges mounted on the geotextile to 100% for the soil moisture blocks after 8 months of operation. The majority of instrument failures occurred either during construction or the first few weeks of operation. The data acquisition system is triggered by traffic passing over piezoelectric sensors and operates remotely. The corresponding data are transferred via modem to Virginia Polytechnic Institute and State University for processing. It is planned that the performance of the pavement test sections will be monitored for a minimum of 3 years.

• Record URL:
  https://doi.org/10.3141/1534-08
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=CONSTRUCTION+AND+INSTRUMENTATION+OF+GEOSYNTHETICALLY+STABILIZED+SECONDARY+ROAD+TEST+SECTIONS&author=T.+Brandon&author=I.+Al-Qadi&author=B.+Lacina&author=S.+Bhutta&publication_year=1996
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309059062
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1534, Geosynthetics: Cold Regions, Flexible Pavements, and Other Issues.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Brandon, T L
  • Al-Qadi, I L
  • Lacina, B A
  • Bhutta, S A
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 50-57
• Serial:
  • Transportation Research Record
  • Issue Number: 1534
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Base course (Pavements); Data collection; Geogrids; Geotextiles; Hot mix asphalt; Instrumentation; Load cells; Monitoring; Remote sensing; Secondary roads; Soil stabilization; Strain gages; Test sections; Thermocouples; Thickness
• Uncontrolled Terms: Stabilization
• Old TRIS Terms: Remote monitoring; Soil moisture cells
• Subject Areas: Geotechnology; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00728456
• Record Type: Publication
• ISBN: 0309059062
• Files: TRIS, TRB
• Created Date: Nov 19 1996 12:00AM