An Evaluation Of The Engineering Properties Affecting The Resilient Modulus Of Ohio Subgrade Soils
Download An Evaluation Of The Engineering Properties Affecting The Resilient Modulus Of Ohio Subgrade Soils full books in PDF, epub, and Kindle. Read online free An Evaluation Of The Engineering Properties Affecting The Resilient Modulus Of Ohio Subgrade Soils ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Engineering Properties Affecting the Resilient Modulus of Fine-grained Soils as Subgrade
Author | : Dong-Gyou Kim |
Publisher | : |
Total Pages | : 338 |
Release | : 1999 |
Genre | : |
ISBN | : |
Ohio soils used as subgrade soils for a road were studied to evaluate parameters affecting resilient modulus. The dominant Ohio soils could be classified in one of three AASHTO Soil Classification system groups, A-4, A-6, and A-7. Laboratory tests were performed on the cohesive soils to measure Atterberg Limits, particle size, optimum moisture content, maximum dry density, and unconfined compressive strength. The resilient modulus tests were conducted on each sample compacted at the dry of optimum, optimum, or wet of optimum moisture content. The measured resilient modulus for each soil sample was analyzed to evaluate the effect of stresses and engineering indexes. Three different models to predict the resilient modulus using engineering indexes were used to compare the measured resilient modulus. The confining stress affected the resilient modulus. The resilient modulus decreased with an increase in the deviator stress, and linearly increased with an increase in the percent of silt and clay and maximum unconfined compressive strength. The increase in moisture content considerably affected the decrease in the resilient modulus. The resilient modulus predicted using the three models showed a large variation with the resilient modulus measured.
Resilient Properties of Subgrade Soils
Author | : Marshall R. Thompson |
Publisher | : |
Total Pages | : 82 |
Release | : 1976 |
Genre | : Pavements |
ISBN | : |
Development of a Constitutive Model for Resilient Modulus of Cohesive Soils
Author | : Dong Gyou Kim |
Publisher | : |
Total Pages | : |
Release | : 2004 |
Genre | : Soil mechanics |
ISBN | : |
Abstract: The objective of this study was to evaluate existing constitutive models currently used by State Department of Transportations (DOTs) and to develop an improved model for predicting resilient modulus (Mr) of cohesive soils from simple soil properties typically measured in DOT laboratories in preference to expensive and complex Mr laboratory testing. The data set used consisted of cohesive soils typical of those used for subgrades in Ohio. Thirteen representative cohesive soils representing A-4, A-6, and A-7-6 soil types collected from road construction sites across Ohio, were tested in the laboratory to determine their basic engineering properties. Mr tests were conducted at three different moisture contents (dry of optimum moisture content, optimum moisture content, and wet of optimum moisture content). Additional tests were performed on samples compacted to optimum conditions but allowed to fully saturate. Mr predicted from six existing models studied showed wide scatter and poor correlation with the measured Mr. An improved constitutive model was developed to account for the effects on Mr of the stress state of the soil and its engineering properties obtained from simple laboratory tests. While most of the existing models investigated in this study significantly overestimated the Mr of a cohesive soil, the proposed model predictions are close to the experimental values and are in most cases a slight underestimation. This implies that Mr values predicted by the proposed model are generally slightly conservative, and can be safely used in the design of flexible pavements to be built on cohesive soils. The proposed model can be a useful and reliable tool for estimating Mr of cohesive subgrade soils using basic soil properties and the stress state of the soil.
Evaluation of In-Situ Stiffness of Subgrade by Resilient and FWD Modulus
Author | : Daehyeon Kim |
Publisher | : |
Total Pages | : |
Release | : 2010-05-15 |
Genre | : |
ISBN | : 9781622600380 |
Determination of Resilient Modulus Values for Typical Plastic Soils in Wisconsin
Author | : Hani Hasan Titi |
Publisher | : |
Total Pages | : 316 |
Release | : 2011 |
Genre | : Pavements |
ISBN | : |
The objectives of this research are to establish a resilient modulus test results database and to develop correlations for estimating the resilient modulus of Wisconsin fine-grained soils from basic soil properties. A laboratory testing program was conducted on representative Wisconsin fine-grained soils to evaluate their physical and compaction properties. The resilient modulus of the investigated soils was determined from the repeated load triaxial (RLT) test following the AASHTO T307 procedure. The laboratory testing program produced a high-quality and consistent test results database.
Long Term Monitoring of Moisture Under Pavements
Author | : William Edward Wolfe |
Publisher | : |
Total Pages | : 118 |
Release | : 2010 |
Genre | : Frost |
ISBN | : |
Monitoring of the environmental instrumentation installed under select pavement sections constructed by the Ohio Department of Transportation (ODOT) in 1995 on US 23 in Delaware County, Ohio was continued. The measurements made consisted of soil moisture, temperature and frost depth profiles.