Engineering Criteria for Use of Geotextile Fabrics in Pavement and Railroad Construction.
Abstract
Available literature concerning the use of geotextiles as separator mechanisms between angular granular and subgrade materials used in the construction of roadways and railroads is presented. Procedures and results of tests using a model load cart with a rolling wheel load to evaluate geotextiles are also presented. The model load cart provides a fast and excellent means of applying a large number of traffic cycles to an aggregate geotextile subgrade system in a short period of time. Criteria for selecting geotextiles to be used in road and railroad construction by the U.S. Army Corps of Engineers are analyzed. A separator mechanism is generally provided between layers in the pavement system for low-volume trafficked short lifetime roadways of any geotextile, but a nonwoven, needle-punched, polyester fabric is required for long-term, high-volume usage. The fabric can weigh a minimum of 4 oz/sq yd and can transmit water laterally. Geotextiles used in railroad construction can be placed 10-12 in. below the bottom of railroad ties to minimize abrasive damage caused by full depth tamping.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1984
- Accession Number
- ADA144813
Entities
People
- R. H. Grau