Packing theory-based framework for evaluating resilient modulus of unbound granular materials

Yideti, Tatek Fekadu; Birgisson, Björn; Jelagin, Denis; Guarin, Alvaro

doi:10.1080/10298436.2013.857772

Cited by 29 publications

(9 citation statements)

References 14 publications

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“…Comparing the two PD plots, the test with w ¼ 3.5% showed a much higher PD, which was probably due to the PC. Thus the probable explanation is that moisture aided the PC, reorientation and change in packing arrangement of the particles which in turn increased the M R of the material (Yideti et al 2013, Liu et al 2014. Thus when the w was increasing up to close to the optimum, the material experienced a faster PC aided by moisture that resulted in increased M R .…”

Section: Analysis Of the Resultsmentioning

confidence: 87%

Moisture influence on the resilient deformation behaviour of unbound granular materials

Rahman

Erlingsson

2015

International Journal of Pavement Engineering

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The influence of moisture on the resilient deformation properties of unbound granular materials was investigated based on repeated load triaxial tests. Results showed that the resilient modulus (M R ) decreased with increasing moisture for a relatively low number of load cycles (N) where the deformation behaviour was mostly resilient with a negligible amount of associated accumulated permanent deformation (PD). Modelling attempts on this behaviour were quite satisfactory. Furthermore, the M R showed an increasing trend with increasing moisture, up to the optimum, when the N was relatively large with a significant amount of accumulated PD. Above the optimum, the M R generally decreased. Further investigation suggested that moisture aided the post-compaction (PC) and possible particle rearrangement that resulted in the increased PD and increased M R . The existing model did not work in this case indicating that the effect of PC on M R should be considered in modelling.

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Section: Analysis Of the Resultsmentioning

confidence: 87%

Moisture influence on the resilient deformation behaviour of unbound granular materials

Rahman

Erlingsson

2015

International Journal of Pavement Engineering

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“…In unbound granular materials, packing arrangement which is to a great extend controlled by the PSD influences the mechanical behavior of granular materials (Santamarina & Cho, 2004). Effect of aggregate packing on potential for permanent deformation (Yideti, Birgisson, Jelagin, & Guarin, 2013), resilient behavior (Yideti, Birgisson, Jelagin, & Guarin, 2014) and California bearing ratio is approved through theoretical and experimental research and analysis.…”

Section: Stiffness Characteristicsmentioning

confidence: 99%

Impact of compaction method on mechanical characteristics of unbound granular recycled materials

Yaghoubi

Disfani

Arulrajah

et al. 2017

Road Materials and Pavement Design

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Laboratory testing methods are constantly being developed to simulate true field conditions in controlled laboratory environment. The aim of laboratory testing methods is to reproduce specimens which accurately replicate field performance in terms of mechanical behavior of pavement materials under applied loads.Compaction is the most common soil stabilization technique in ground improvement and pavement construction works. Among the available laboratory compaction methods, impact method followed by the static method are the most commonly used procedures. Since the nature and approach of these two compaction methods is fundamentally different, an investigation on the effect of using these techniques on the mechanical performance of pavement materials prepared by each of these methods is essential, so as to better understand both these compaction methods. In this regard, two types of recycled Construction and Demolition (C&D) materials suitable for pavement applications, being Crushed Brick (CB) and Recycled Concrete Aggregate (RCA) were selected. Laboratory specimens were prepared using the two above-mentioned procedures. Different aspects of geotechnical characteristics of the specimens, including aggregate breakage, changes in soil-water characteristics, stiffness and resilient characteristics, etc., were investigated. The outcomes of this research indicate that the influence of method of compaction must be considered when interpreting the laboratory test results for field design purposes.

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“…This type of approach is particularly beneficial as it not only allows to predict the materials performance based on its gradation, but also as it provides a tool to adjust the gradation to achieve optimal performance in the field. As the gradation model presented in Yideti et al (2013a) has already been used successfully to predict granular materials performance with respect to resistance to permanent deformation (Yideti et al, 2013a) and resilient modulus properties (Yideti, Birgisson, Jelagin, & Guarin 2013b), extending it further to describe the CBR performance of unbound materials also allows to establish a unified framework for unbound granular materials performance prediction. Yideti et al (2013a) presented the packing theory-based framework for unbound granular materials composed of stones with a size distribution described through a gradation analysis.…”

Section: Introductionmentioning

confidence: 99%

Influence of aggregate packing structure on California bearing ratio values of unbound granular materials

Yideti

Birgisson

Jelagin

2013

Road Materials and Pavement Design

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Over the past several decades, California bearing ratio (CBR) value has been used in many countries for empirical pavement designs and still many countries are using it for unbound granular materials strength measurement and as input to their pavement design chart. Furthermore, CBR value of unbound granular material is frequently correlated with its fundamental mechanical properties such as resilient modulus, which in turn is often used as an input to a mechanistic pavement design procedure. In the present study, the effect the aggregate packing has on the CBR values of unbound materials is investigated. A packing theory-based framework that allows to identify the load-carrying part of the aggregate skeleton is presented. Aggregate packing parameters controlling the CBR performance of the unbound materials are introduced and evaluated with the experimentally measured CBR values of 20 unbound granular materials found in the literature. It is shown that the CBR values of granular materials are to a great extent controlled by the packing characteristics of their load-carrying skeleton.

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Packing theory-based framework for evaluating resilient modulus of unbound granular materials

Cited by 29 publications

References 14 publications

Moisture influence on the resilient deformation behaviour of unbound granular materials

Moisture influence on the resilient deformation behaviour of unbound granular materials

Impact of compaction method on mechanical characteristics of unbound granular recycled materials

Influence of aggregate packing structure on California bearing ratio values of unbound granular materials

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