DSC modelling for predicting resilient modulus of crushed rock base as a road base material for Western Australia roads
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Abstract: In order to increase the applied efficiency of crushed rock base(CRB) in pavement structure design for Western Australia roads, the material modelling based on the experimental results was investigated, and the disturbed state concept(DSC) was used to predict the resilient modulus of CRB because of its simplicity and strong ability in capturing the elastic and inelastic responses of materials to loads. The actual deformation of DSC, at any loading state, was determined from its assumed relative intact(RI) state. The DSC equation of CRB was constructed by using a set of experimental results of resilient modulus tests, and an idealized material model, namely the linear elastic model, of relative intact(RI) part was considered. Analysis results reveal that the resilient modulus-applied stress relationships back-predicted by using the DSC modelling are consistent with the experimental results, so, the DSC equation is suited for predicting the resilient modulus of CRB specimen. However, the model and the equation coming from the test results are conducted in accordance with the Austroads standard, so further investigation and validation with respect to the field behaviours of pavement structure should be performed.
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Key words:
- pavement engineering /
- CRB /
- resilient modulus /
- DSC /
- RI /
- triaxial test
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[1] LEEK C, MCINNES D. Crushed rock base course[C]//TRB. Local Government Engineers Association of Western Australia State Conference, 9th. Washington DC: TRB, 1992: 137-47. [2] Australian standard 3972—1997, Portland and blended cements[S]. [3] ADAMSON L. Structural design of pavements[D]. Perth: University of Western Australia, 2011. [4] YOUDALE G. Australian pavement research—the last 20 years[D]. Washington DC: TRB, 2009. [5] JITSANGIAM P, NIKRAZ H R, SIRIPUN K. Characterization of hydrated cement treated crushed rock base(HCTCRB)as a road base material in Western Australia[C]//ASCE. The 6th Regional Symposium on Infrastructure Development in Civil Engineering(RSID 6). Bangkok: ASCE, 2009: 1-8. [6] KHOBKLANG P, VIMONSATIT V, JITSANGIAM P, et al. Constitutive modelling of hydrated cement treated crush rock base with cyclic-loading behaviour[C]//MOHAMED S, HAMID N. International Conference on Advances in Geotechnical Engineering (ICAGE 2011). Perth: Curtin University, 2011: 351-356. [7] KHOBKLANG P, VIMONSATIT V, JITSANGIAM P, et al. DSC constitutive modelling of hydrated cement treated crushed rock base as a road base material for Western Australia roads[C]//Pro. Congress Co., Ltd. 7th International Conference on Road and Airfield Pavement Technology. Bangkok: Pro. Congress Co., Ltd., 2011: 1064-1076. [8] VUONG B T, BRIMBLE R. Austroads repeated load triaxial test method: determination of permanent deformation and resilient modulus characteristics of unbound granular materials under drained conditions[D]. Perth: APRG, 2000. [9] Test method WA 133.1—2012, dry density/moisture content relationship: modified compaction fine and medium grained soils[S]. [10] SANE S M, DESAI C S, JENSON J W, et al. Disturbed state constitutive modeling of two Pleistocene tills[J]. Quaternary Science Reviews, 2008, 27(3/4): 267-283. [11] DESAI C S. Mechanics of Materials and Interfaces: The Disturbed State Concept[M]. Washington DC: CRC Press, 2000. -
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