Thesis - Open Access
Master of Science (MS)
Department / School
Civil and Environmental Engineering
base course, dynamic cone penetrometer, layer thickness, low volume road, maintenance, South Dakota
A majority of roads in the state of SD are low volume roads (LVRs). The SDDOT has developed simplified methods for LVR pavement thickness selection. These guides allow users to obtain recommended asphalt surfacing and base course layer thickness based on the subgrade support and the average daily traffic (ADT) of the road. The main objective of this study is to relate the surface condition of LVRs to their ADT, layer thicknesses, foundation material properties, and maintenance. A secondary objective was to evaluate if the Dynamic Cone Penetrometer (DCP) is an acceptable tool in determining the subgrade support by using it to measure the penetration resistances of the foundation layers. A total of 16 different asphalt surfaced LVRs across SD were tested. The construction and maintenance histories of the roads was obtained. The performance of the roads was evaluated based on the surface condition of the pavement. Field tests were performed to obtain the layer thicknesses, DCP Penetration Index, and samples were obtained for laboratory testing. The laboratory testing included moisture content, liquid limit, plastic limit, and gradation tests. The results of the tests were used to compare the layer thicknesses and material properties to both the performance of the roads and the suggested thicknesses and material specifications from the SDDOT guides. Based on the analysis, it was determined that the DCP test did not provide an adequate measure of the subgrade soil support to be used in the SDDOT Rural Road Design Guide. It was also determined that the layer thicknesses, material quality, and maintenance schedule all contribute to the performance of asphalt surfaced LVRs. They have the greatest positive impact on a road’s performance when all three of these components satisfy the guidelines in the SDDOT Rural Road Design Guide.
Library of Congress Subject Headings
Low-volume roads -- South Dakota -- Design and construction
Low-volume roads -- South Dakota -- Maintenance and repair
Pavements -- South Dakota -- Design and construction
Roads -- Foundations -- Penetration resistance -- Evaluation
Includes bibliographical references (pages 218-221)
Number of Pages
South Dakota State University
Clemen, Alyssa, "Foundation Design of Low Volume Roads: Evaluation and Performance" (2016). Electronic Theses and Dissertations. 1039.