Details:

Creators:
Figueroa, J. L. ; DeButy, P. W.
Figueroa, J. L. ; DeButy, P. W. Less -
Corporate Contributors:
Case Western Reserve University. Department of Civil Engineering
Subject/TRT Terms:
[+]
Bituminous Concretes Delaware(Ohio) Elastic Properties Fatigue Life Flexible Pavements Frost Susceptible Soil Hot Mix Paving Mixtures Pavement Performance Pavements Road Construction Soils Soil Water Subgrade Materials Subgrades Test Roads
Publication/ Report Number:
ST/SS/98-001
Resource Type:
Tech Report
Geographical Coverage:
Ohio
Edition:
Final report
Corporate Publisher:
Ohio. Dept. of Transportation
Abstract:
The performance of flexible and rigid pavements depends not only on the effects of traffic but also on environmental effects. As part of the Federal Highway Administration's (FHWA) Strategic Highway Research Program (SHRP), a test road was recently constructed on U.S. 23 just North of Delaware, Ohio. This road includes four different sets of sections to study various factors affecting pavement performance. Monitoring environmental factors is of extreme value as they affect subgrade soil and pavement layer properties and subsequently pavement life and performance. Five seasonal instrumentation sites as well as the responsibility for the onsite weather station for the Ohio Test Road were assigned to Case Western Reserve University. Installation and monitoring procedures for subgrade soil moisture content, pavement and subgrade temperature, and frost depth sensors as well as the monitoring of a compkete weather station is discussed. The methodology to check the quality of the data is presented along with preliminary results and correlated of use in the eventual development of a mechanistic design procedure. In addition, subgrade soil and AC materials were tested to characterize important properties and to develop useful correlation. Finite element computer analyses were also conducted to determine the influence of seasonal factors on the reponse of flexible pavement to traffic loads. Specifically, equations were developed to correlate AC temperatures with hourly ambient air temperatures to ultimately determine the resilient modulus. Characteristic resilient modulus values of the fine-grained silty clays found at the site were determined as a function of the degree of saturation. Equations were established relating the AC resilient modulus to temperature for both the surface and intermediate layers. Indirect tensile strength testing was performed at two temperatures on two types of AC with the results being within generally accepted limits. using material test results, finite element analyses were conducted on an actual pavement section using the program ILLIPAVE. Results show reasonably accurate comparisons for stress, strain, and deflections between pavements modeled with a constant average modulus and those modeled with multiple layers having moduli established by temperature/ However, key paraneters such as the AC radial tensile strain fo not show comparisons justifiable for using uniform moduli analyses.
Format:
PDF
Funding:
State job No 14663(0)
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:36dbc95c9e15fc2f79a77ef909fdb976272f7e978530f652d0d3d1d199b34471
Download URL:
https://rosap.ntl.bts.gov/view/dot/15626/dot_15626_DS1.pdf
File Type:

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