A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The main objectives of the study were to establish resilient moduli for typical roadbed soils, to conduct a field evaluation of subgrade moisture and density for selected in-service pavement systems, and to develop a quick and reliable method for determining subgrade resilient moduli. The goal of the study was to develop design moduli that could be used in the implementation of the 1986 'AASHTO Guide for the Design of Pavement Structures' by the Georgia Department of Transportation. Thirty-five test sites throughout Georgia were established. These sites were selected to include a variety of environmental, geologic, geographic, and pavement characteristics. Soil samples from these sites and soils routinely submitted for California Bearing Ratio (CBR) evaluation were tested for resilient modulus. Monthly monitoring of the in-situ moisture and density of the subgrade at the sites were made to determine the fluctuations in these conditions so that the seasonal changes in resilient modulus could be established. The study found that the differences in the resilient properties of granular and cohesive soils tested were too great to develop a quick and reliable method of predicting the subgrade's modulus according to its GDOT soil classification and stress dependent equations.
The main objectives of the study were to establish resilient moduli for typical roadbed soils, to conduct a field evaluation of subgrade moisture and density for selected in-service pavement systems, and to develop a quick and reliable method for determining subgrade resilient moduli. The goal of the study was to develop design moduli that could be used in the implementation of the 1986 'AASHTO Guide for the Design of Pavement Structures' by the Georgia Department of Transportation. Thirty-five test sites throughout Georgia were established. These sites were selected to include a variety of environmental, geologic, geographic, and pavement characteristics. Soil samples from these sites and soils routinely submitted for California Bearing Ratio (CBR) evaluation were tested for resilient modulus. Monthly monitoring of the in-situ moisture and density of the subgrade at the sites were made to determine the fluctuations in these conditions so that the seasonal changes in resilient modulus could be established. The study found that the differences in the resilient properties of granular and cohesive soils tested were too great to develop a quick and reliable method of predicting the subgrade's modulus according to its GDOT soil classification and stress dependent equations.
Subgrade Resilient Modulus Evaluation
S. F. Valdez (author)
1991
107 pages
Report
No indication
English
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