Results 251 to 260 of about 27,414 (309)

Backcalculation of dynamic modulus from resilient modulus test data

Canadian Journal of Civil Engineering, 2011
For the past few decades, the stiffness of asphalt material has been commonly characterized by means of resilient modulus. However, the resilient modulus is not a fundamental material property, and hence, the concept of resilient modulus has been subsequently diminished in the latest Mechanistic-Empirical Pavement Design Guide (MEPDG).
Hyung Suk Lee, Jaeseung Kim
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Resilient Modulus for EPS Geofoam

Soil and Material Inputs for Mechanistic-Empirical Pavement Design, 2007
Most of the current design methods for geofoam used in pavement structures adopt the allowable working stress concept. These design methods do not fit rationally in conventional pavement design practice such as the AASHTO pavement design guide. To design flexible pavement structures according to AASHTO, the resilient modulus, M r , for EPS geofoam ...
Xiaodong Huang, Dawit Negussey
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Resilient Modulus and Dynamic Modulus of Warm Mix Asphalt

GeoCongress 2008, 2008
Warm Mix Asphalt (WMA) is produced at temperatures in the range of 30uF to 100uF (17uC to 56uC) lower than the traditional hot mix asphalt (HMA). It has a number of benefits including reducing energy consumption, emissions from burning fuels, and volatiles generated from the heated asphalt binder at the production plant at the paving site.
Shu Wei Goh, Zhanping You
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Extracting Damping Information from Resilient Modulus Tests

Journal of Materials in Civil Engineering, 2017
AbstractIn addition to the dynamic moduli, the damping properties of the different pavement layers are required by most algorithms used for modeling the dynamic responses of pavement caused by movi...
Pereira, Claudio, Nazarian, Soheil, Correia, A. Gomes   +2 more
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Resilient Modulus Backcalculation Techniques for Track

Performance Confirmation of Constructed Geotechnical Facilities, 2000
The layer moduli of track substructure components are important factors in the evaluation of track condition and estimation of maintenance costs. Layer moduli can be estimated from in-situ tests such as the cone penetration test (CPT); however, for layers of open graded aggregate, such as railway ballast with large individual particles, the results of ...
Theodore R. Sussmann, Ernest T. Selig
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Modeling the Resilient Modulus of Soils

2020
Various mathematical models appear in the literature for expressing the relationship between resilient modulus and stress state. In this paper, four mathematical models that are oftentimes cited in the literature are examined and evaluated for their ability to relate resilient modulus and stress.
B. Ni, T.C. Hopkins, L. Sun, T.L. Beckham   +3 more
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Resilient Modulus of Cement-Stabilized Phosphogypsum

Journal of Materials in Civil Engineering, 1996
This paper presents the findings of a preliminary study of the dependence of resilient modulus of cement-stabilized phosphogypsum on various material parameters. In particular, the dependence of the resilient modulus on cement content, dry unit weight, moisture content, and curing time was determined.
M. I. Pericleous, J. B. Metcalf
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Resilient Modulus of Kentucky Soils

2001
In recent years, the American Association of State Highway Transportation Officials (AASHTO) has recommended the use of resilient modulus for characterizing highway materials for pavement design. This recommendation evolved as of a result of a trend in pavement design of using mechanistic models, which are based on the theory of elasticity (layered ...
Hopkins, Tommy C., Beckham, Tony L., Sun, Charlie, Ni, Bixian   +3 more
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Resilient Modulus for Unsaturated Unbound Materials

Road Materials and Pavement Design, 2011
ABSTRACT The suitability of the current resilient modulus test protocol (NCHRP 1-28A) for its application to unsaturated soils was assessed. Modifications to the stress state conditions of the protocol are necessary due to the axis-translation needed during the test when measuring matrix suction.
Carlos E Cary, Claudia E Zapata
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Predicting the Resilient Modulus of Asphalt Concrete from the Dynamic Modulus

Transportation Research Record: Journal of the Transportation Research Board, 2007
The NCHRP 1-37A Guide for Mechanistic-Empirical Design of New and Rehabilitated Design Structures introduces the dynamic modulus as the material property to characterize asphalt concrete. This is a significant change from the resilient modulus used in the previous AASHTO pavement design guide.
Andrew Lacroix, A. Ardalan Mosavi Khandan, Y. Richard Kim   +2 more
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