Results 271 to 280 of about 28,065 (311)

Grading and frequency dependence of the resilient modulus of ballast

Géotechnique Letters, 2018
The stress–strain and degradation response of railway ballast to imparted train loading is often largely dominated by intrinsic properties, including particle size and particle-size distribution (PSD). To investigate these aspects, a series of large-scale triaxial cyclic tests were conducted on railway ballast.
Y. Sun, S. Nimbalkar, C. Chen
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Resilient modulus properties of granular highway materials

Canadian Journal of Civil Engineering, 2009
An essential component of the new Guide for mechanistic–empirical design of new and rehabilitated pavement structures for the design of flexible pavement structures is the use of resilient modulus for base / subbase materials and subgrade soils. This study reports on resilient modulus (Mr) test results for unbound pavement materials that were obtained
Dieter Stolle, Peijun Guo, Ying Liu
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Resilient Modulus Testing for Pavement Components

2003
Description Nineteen peer-reviewed papers address the latest issues affecting the resilient modulus test and use of the test results. Resilient modulus indicates the stiffness of a soil under controlled confinement conditions and repeated loading.
GN Durham, WL DeGroff, WA Marr
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Analysis on the seasonal effect of subgrade resilient modulus

2010 International Conference on Mechanic Automation and Control Engineering, 2010
The paper first analyzes the seasonal variation law of subgrade resilient modulus and water content, and then summarizes the common quantitative adjustment methods, calculation of the equivalence of resilient modulus based upon damage equivalence, for resilient modulus of subgrade in the process of season alterations.
null Li Cong, null Ling Jianming, null Guan Shengfei   +2 more
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Resilient Modulus Variations with Water Content

2003
Resilient modulus (MR) variations with water content were carefully examined for three subgrade soils—lean clay, clayey sand, and clayey gravel. For each soil type, four MR tests were performed at the following water contents: 2 to 3% dry of optimum, at optimum; 2 to 3% wet of optimum; and at full backpressure saturation.
J Li, BS Qubain
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Subgrade Resilient Modulus Correction for Saturation Effects

Journal of Geotechnical and Geoenvironmental Engineering, 1997
Mechanistic design methods for flexible pavement require the specification of the resilient modulus Mr for each soil subgrade encountered in the pavement project.
Eric C. Drumm, Jason S. Reeves, Mark R. Madgett, William D. Trolinger   +3 more
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Resilient Modulus for Fine‐Grained Subgrade Soils

Journal of Geotechnical Engineering, 1994
A method has been developed for the estimation of resilient modulus of compacted fine-grained subgrade soils. The method takes into account the influence of soil physical state, stress state, and soil type. The effect of soil physical state is quantified by combinations of two equations relating resilient modulus to moisture content.
Dingqing Li, Ernest T. Selig
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Prediction Model of Graded Gravel Resilient Modulus

ICTE 2011, 2011
According to the nonlinear characteristic of graded gravel resilient modulus, Based on the optimization of the three kinds of graded gravel as the research object, and combined with repeated dynamic triaxial test data, compared k~θ model and Uzan model, using statistical analysis software 1stopt carries on the experimental parameters of nonlinear ...
Xiushan Wang, Gang Li
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Correlation of Resilient and Seismic Modulus Test Results

Journal of Materials in Civil Engineering, 2007
The most common test to evaluate the representative modulus and nonlinear behavior of base and subgrade materials is the resilient modulus test. Due to the comprehensive nature of the method, the preparation and testing of one specimen may take up to 6 h.
R. R. Williams, S. Nazarian
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Repeatability of the Resilient Modulus Test Procedure

2003
Through the work of the Strategic Highway Research Program (SHRP, 1987–1992) and the Federal Highway Administration (FHWA, 1992-present), the government has provided financial and technical assistance to develop and improve a laboratory test method to determine the resilient modulus properties of unbound materials.
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