6 research outputs found
Mechanical behaviours of hydrated cement treated crushed rock base as a road base material in Western Australia
No full textHydrated cement treated crushed rock base (HCTCRB) is widely used as a base course material for Western Australian roads. In order to be able to use this material effectively, its shear strength, resilient modulus and permanent deformation characteristics should be investigated and clearly understood. This study aimed to carry out the results of implement laboratory testing, which was to assess the mechanical characteristics of HCTCRB. Our findings show that HCTCRB can be characterised as the cohesive granular material that has a cohesion (c) of 177 kPa and an internal friction angle of 42°. The resilient modulus characteristics can be modelled using the Uzan model. The permanent deformation characteristics can be modelled using the Sweere, G.T.H.'s model. These models are based on the test results following the Austroads – APRG 00/33 test standard
A preliminary study on characterisation of mechanical behaviour of hydrated cement treated crushed rock base using the disturbed state concept
No full textFor road pavements in Western Australia, base layers are usually constructed using hydrated cement treated crushed rock base (HCTCRB) of which the mechanistic properties with the reliable material model are necessary for rational pavement analysis and design. The purpose of this study is to present the experimental results produced from the assessment of the mechanical behaviour of HCTCRB and the material modelling based on the Disturbed State Concept theory-based process. The results reveal that HCTCRB can be treated as cohesive granular material where its internal friction angle (ø) is 43° and its cohesion (c) is 168 kPa. The Disturbed State Concept (DSC) and K-θ model can be used for establishing the relationship between the resilient moduli and the applied stresses. The permanent deformation of HCTCRB can be predicted by using models such as the DSC model and G.T.H. Sweere,’s model, which are presented in this paper. The use of the DSC model shows the advantage of showing the relationship between permanent deformations and applied stresses (σ1, σ3), and these are derived from the resilient modulus equation
