Results 191 to 200 of about 2,837 (233)
Some of the next articles are maybe not open access.
Pavement Design Model for Unbound Granular Materials
Journal of Transportation Engineering, 2004This paper reports the results of several repeated load triaxial tests performed on a crushed rock aggregate at different stress levels. The development of the resulting permanent deformation that accumulates with the repeated loading is described and compared with the types of responses usually described by the shakedown approach. It is shown that the
S. Werkmeister, A. R. Dawson, F. Wellner
openaire +1 more source
Stress dependent and redistribution behaviour of unbound granular material
International Journal of Pavement Engineering, 2018The paper is presented to investigate the tensile stress modification effect on unbound granular materials. The theory of tensile stress modification was proposed and discussed.
Shaohui Li, Peiwen Hao
openaire +1 more source
Predicting permanent deformation behaviour of unbound granular materials
International Journal of Pavement Engineering, 2014To reliably predict the permanent deformation behaviour of unbound granular materials (UGM) in a pavement structure, the material parameters of the constitutive models used in design should be evaluated using a multi-stage (MS) loading approach. This paper investigated the prediction of the accumulation of permanent strain in UGM using some current ...
Mohammad Shafiqur Rahman +1 more
openaire +1 more source
Viscoelastic–Viscoplastic Characterization of Unbound Granular Material
Advances in Civil Engineering Materials, 2014Abstract The mechanical behavior of unbound granular materials had proven to be extremely challenging. In the pavement field, as well as in other geotechnical disciplines, these materials are usually treated as time-independent. The objective of this work is to explore the applicability and potential for a viscoelastic-viscoplastic ...
openaire +1 more source
Influences on Permanent Deformation Behavior of Unbound Granular Materials
Transportation Research Record: Journal of the Transportation Research Board, 1996The results of a research program aimed at characterizing the permanent deformation behaviors of different types of unbound aggregates under repeated loading are summarized. Tests were performed in a triaxial or hollow-cylinder apparatus, depending on the grading of the materials.
Fredrick Lekarp +2 more
openaire +1 more source
Modelling permanent deformation behaviour of unbound granular materials
Construction and Building Materials, 1998A state of the art is presented on modelling permanent deformation behaviour of unbound granular materials. The existing numerical models are verified by a series of laboratory repeated load tests. A new model is introduced expressing the accumulated permanent axial strain at any given number of cycles as a function of applied stresses, taking into ...
F Lekarp, A Dawson
openaire +1 more source
Evaluation of the Shakedown Behavior of Unbound Granular Base Materials
Geo-Frontiers 2011, 2011The shakedown theory concept has been successfully used to characterize the response of unbound granular base materials in a pavement structure. Within this concept, two stress limits are used to comprehensively describe the behavior of granular base materials under cyclic loading: an elastic shakedown limit, below which the material will eventually ...
Munir D. Nazzal +2 more
openaire +1 more source
The design model of unbound granular materials for flexible pavement
Australian Journal of Civil Engineering, 2012This study aims to introduce an alternative design model of unbound granular base course materials by utilising laboratory test results such as resilient modulus, permanent deformation and bearing capacity of base course materials. Current pavement designs mostly overlook all problematical behaviours of unbound granular base layers and consider only as
Siripun, Komsun +2 more
openaire +2 more sources
The Effect of Cyclic Load Characteristics on Unbound Granular Materials
Transportation Infrastructure Geotechnology, 2019Vertical load characteristics used in laboratory repeated load triaxial tests (RLTT) have a significant impact on evaluating unbound granular materials (UGMs) for the flexible road pavements. Many studies and standard testing protocols suggest a diverse range of these characteristics (i.e.
Ali Alnedawi +2 more
openaire +1 more source
Transportation Geotechnics, 2019
Abstract This study aims to investigate the mechanical behavior of unbound granular materials (UGM) the using precision unbound material analyzer (PUMA) and repeated load triaxial test (RLTT). Both single-size and mixed-size aggregate and two graded materials were used for multi-stage loading tests in this study.
Ning Li, Hao Wang, Biao Ma, Rui Li
openaire +1 more source
Abstract This study aims to investigate the mechanical behavior of unbound granular materials (UGM) the using precision unbound material analyzer (PUMA) and repeated load triaxial test (RLTT). Both single-size and mixed-size aggregate and two graded materials were used for multi-stage loading tests in this study.
Ning Li, Hao Wang, Biao Ma, Rui Li
openaire +1 more source