Analysis of Resilient Modulus of Dense- and Open-Graded Aggregates

Heydinger, Andrew G.; Xie, Qinglu; Randolph, Brian W.; Gupta, Jiwan D.

doi:10.3141/1547-01

Cited by 14 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, well-graded materials tend to have higher stiffness when compared to that of uniformly graded materials. Heydinger et al (1996) and Van Niekerk et al (2002) confirmed this for limestone and sand, crushed masonry, and crushed concrete. For gravel, Heydinger et al (1996) found no big difference in stiffness between well-graded and uniformly graded ones.…”

Section: (D) Gradation and Particle Shapementioning

confidence: 83%

Stress-path dependency of resilient behaviour of granular materials

Liu¹,

Stolle²,

Guo³

et al. 2013

International Journal of Pavement Engineering

View full text Add to dashboard Cite

The resilient modulus and Poisson's ratio of granular materials used in flexible pavement structures is highly nonlinear, stress/strain path and direction-dependent. Resilient properties are very important for realistic flexible pavement design. By far, several important aspects, such as the effect of stress path, major principal stress rotation, initial stress state and inherent fabric, on the cross-anisotropic resilient properties are not fully understood. The main objective of this thesis was to study the cross-anisotropic resilient properties of granular materials along various stress paths from both initial isotropic and initial anisotropic stress states. Extensive resilient modulus stress path tests were performed for this purpose.In this research, the resilient behaviour of the test material for initial isotropic stress states along various stress paths was investigated first, with particular interest in the stress/strain path dependency. New resilient modulus equations were then developed, by taking into account the effect of confining pressure and resilient strains. These equations can be used to estimate the cross-anisotropic resilient modulus corresponding to initial isotropic stress states. Selection of Poisson's ratio was also investigated.The effect of initial stress state on the resilient responses was studied through a series of stress path tests with constant confining pressure and constant vertical stress, respectively. Based on the experimental findings, revised equations for resilient modulus and Poisson's ratio were proposed to account for the effect of ratio of initial horizontal stress to vertical stress (Kini). The proposed eq~ations can predict the cross-anisotropic 111 resilient properties for various stress paths corresponding to initial isotropic/anisotropic stress conditions.In order to provide a more comprehensive insight into the complex resilient properties of granular materials along different stress/strain paths for various initial stress states, a micromechanics approach was introduced to back-calculate the degree of fabric anisotropy. The variations of fabric with stress path, initial stress state and final stress state (i.e., state which corresponds to the peak stress during cyclic loading) were investigated. To provide a reliable prediction of initial/inherent fabric anisotropy and fabric evolution in constitutive s with embedded microstructure, an evolution law of fabric anisotropy was developed.

show abstract

Section: (D) Gradation and Particle Shapementioning

confidence: 83%

Stress-path dependency of resilient behaviour of granular materials

Liu¹,

Stolle²,

Guo³

et al. 2013

International Journal of Pavement Engineering

View full text Add to dashboard Cite

show abstract

“…In the case of UGM, the deviator or shear stress is considered much less influential on material stiffness than other stress variables (Lekarp et al, 2000;Nazarian et al, 1996). Some observers have detected a slight softening dependency for low stress level, and a slight hardening at high stress levels (Hicks and Monismith, 1971); others have observed a hardening effect of r d (Uzan, 1999;Heydinger et al, 1996).…”

Section: Modelling Of Resilient Modulusmentioning

confidence: 95%

Long-term resilient and permanent deformation behaviour of Controlled Low-Strength Materials for pavement applications

Bassani

Khosravifar

Goulias

et al. 2015

Transportation Geotechnics

View full text Add to dashboard Cite

“…Design for pavements and rehabilitation of layered pavement systems use M r as an essential parameter in the design process (Heydinger et al, 2007). Generally, a higher M r infers a stiffer base course layer, which increases pavement life.…”

mentioning

confidence: 99%

Resilient Modulus of Recycled Asphalt Pavement and Recycled Concrete Aggregate

Bozyurt

Tinjum²,

Son

et al. 2012

GeoCongress 2012

View full text Add to dashboard Cite

The most common recycled construction materials used as unbound base course in pavement construction are recycled concrete aggregate (RCA) and recycled asphalt pavement (RAP). This study investigated the mechanical properties of RCA and RAP as unbound base, including the relationships between resilient modulus (M r ) and composition (e.g., particle shape, binder type, aggregate mineralogy, and contamination). The recycled materials were collected from a wide geographical area, covering eight states in the U.S. The M r tests were conducted following National Cooperative Highway Research Program (NCHRP) protocol, which measures specimen deflections externally and internally. Power function and NCHRP models were applied to estimate M r . The NCHRP model was more reliable in capturing M r dependency on stress state in RCA and RAP. A multiple linear regression model was developed to predict the M r of RCA (R 2 =0.96) and RAP (R 2 =0.97). There was a high degree of correlation between the predicted M r and the physical properties of RCA (R 2 =0.89) and RAP (R 2 =0.99).

show abstract

Analysis of Resilient Modulus of Dense- and Open-Graded Aggregates

Cited by 14 publications

References 1 publication

Stress-path dependency of resilient behaviour of granular materials

Stress-path dependency of resilient behaviour of granular materials

Long-term resilient and permanent deformation behaviour of Controlled Low-Strength Materials for pavement applications

Resilient Modulus of Recycled Asphalt Pavement and Recycled Concrete Aggregate

Contact Info

Product

Resources

About