A New Approach for Estimating the Influence of Soil Suction on the Resilient Modulus of Pavement Subgrade Soils

Han, Zhong; Mihambanou, Baudin; Vanapalli, Sai K.

doi:10.1061/9780784479216.076

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…Some researchers have shown that the effect of variation of suction value on the mechanical behaviours of compacted granular materials could be related to the variation of water content (Cary & Zapata, 2011;Han, Mihambanou, & Vanapalli, 2015;Ho et al, 2014a;Kolisoja, Saarenketo, Peltoniemi, & Vuorimies, 2002;Nowamooz et al, 2011;Salour, Erlingsson, & Zapata, 2014;Yang, Lin, Kung, & Huang, 2008).…”

Section: Suction Of Unsaturated Soilmentioning

confidence: 99%

Permanent deformation behaviour of a granular material used in low-traffic pavements

Jing

Nowamooz

Chazallon

2016

Road Materials and Pavement Design

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Granular materials are usually used in low-traffic pavement structure as base layer or sub-base layer. The influence of fine content on permanent axial deformation behaviour is significant as well as the water content. This study aims to investigate the permanent axial deformation behaviour of the granular material under cyclic loading at various water contents and various fine contents. A triaxial apparatus is used to obtain permanent axial deformation on the samples prepared with the same dry density at different water contents between 7% and 11% and at different fine contents of 4%, 7.5% and 15.3%. The results show the significant influence of water content and fine content on permanent axial deformation behaviour. The permanent axial deformation increases with the increase of water content while the influence of fine content depends on the water sensitivity of fine particles and their initial water contents. The modified empirical-analytical models are proposed for describing the evolution of permanent axial deformation based on the results in the single-stage test and the multi-stage tests. It takes into account the number of cycles, the stress level, the water content and the fine content of the granular material. Two approaches are used: one based on the water contents and fine contents and the other based on suction values. The approach based on suction values needs less number of parameters to describe permanent axial deformation compared with the approach based on the water contents and fine contents while the two approaches present more or less the same accuracy. The simulation results show a very good capacity of the proposed approaches. These findings reduce the number of tests required to predict permanent axial deformation.

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Section: Suction Of Unsaturated Soilmentioning

confidence: 99%

Permanent deformation behaviour of a granular material used in low-traffic pavements

Jing

Nowamooz

Chazallon

2016

Road Materials and Pavement Design

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“…Several researches have shown that besides the effect of water content on the mechanical behaviours of the unsaturated granular materials, it is necessary to take into account the effect of suction (Yang et al 2008, Cary & Zapata, 2011, Nowamooz et al 2011, Nowamooz et al 2013, Salour et al 2014, Han et al 2015and Jing et al 2016, 2017 as well as hydraulic hysteresis (Miller et al 2008, Yang et al 2012and Ho et al 2014). Different experimental researches showed that the variation of fine content (particles passing the sieve 75 µm or sieve No.200 based on American classification) has also an important effect as well as water content on mechanical behaviours of granular materials as reported by Babić et al 2000, Duong et al 2013and Jing et al 2016, 2017 However, the relationship between resilient strain behaviours and unsaturated state with different fine contents has been rarely studied.…”

mentioning

confidence: 99%

Experimental characterization of unbound granular materials subjected to high harmonic loads

Falla¹,

Leischner²,

Wellner³

et al. 2017

Bearing Capacity of Roads, Railways and Airfields

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Road pavement structures are generally composed of unsaturated granular materials. The influence of the fine content is significant as well as unsaturated state on the resilient strain behaviour of granular materials for pavements. In this paper, based on the soil water retention curves and repeated load triaxial tests for a granular material with three fine contents, the simple exponential function relationship between resilient strain behaviours and s/s* values (suction) could be observed, which can reduce the number of tests required to determine the unsaturated resilient strain behaviours of this kind of granular material.

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A New Approach for Estimating the Influence of Soil Suction on the Resilient Modulus of Pavement Subgrade Soils

Cited by 2 publications

References 24 publications

Permanent deformation behaviour of a granular material used in low-traffic pavements

Permanent deformation behaviour of a granular material used in low-traffic pavements

Experimental characterization of unbound granular materials subjected to high harmonic loads

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