Study on Two Unbound Granular Materials Stiffness Analysis with Staged Repeated Load CBR Test

2021 ◽  
pp. 142-148
Author(s):  
Abdelaziz Salmi ◽  
Lahbib Bousshine ◽  
Khaled Lahlou
Keyword(s):  
Granular Materials ◽  
Stiffness Analysis ◽  
Unbound Granular Materials ◽  
Cbr Test ◽  
Repeated Load

scholarly journals Two unbound granular materials stiffness analysis with staged repeated load CBR test

2019 ◽  
Vol 286 ◽  
pp. 06003
Author(s):  
Abdelaziz Salmi ◽  
Lahbib Bousshine ◽  
Khaled Lahlou
Keyword(s):  
Granular Materials ◽  
Poisson Ratio ◽  
Elastic Behaviour ◽  
Unbound Granular Materials ◽  
Material Stiffness ◽  
Cbr Test ◽  
Repeated Load ◽  
Stress States ◽  
Equivalent Modulus ◽  
Linear Elastic Behaviour

Design methods of flexible pavements in many countries are based on linear elastic behaviour model for Unbound Granular Materials (UGM). In this context, parameters required to characterize an UGM in structural analysis of pavements are Stiffness modulus and Poisson ratio (E and ν). This paper presents a study of two UGM stiffness. Finite element simulation of repeated load CBR (RL-CBR) test has allowed to derive equation used in calculation of materials equivalent modulus based on laboratory RL-CBR Outputs. The staged RL-CBR test is used to evaluate material stiffness for different stress states to highlight its influence on UGM stiffness and compare studied materials. Also, this paper shows that even if two materials are different according to the current road authority specifications, they can represent similar stiffness.

Use of repeated load CBR test to characterize pavement granular materials

2016 ◽  
pp. 965-974
Author(s):  
Nagula Sparsha ◽  
R.G. Robinson ◽  
J. Murali Krishnan
Keyword(s):  
Granular Materials ◽  
Cbr Test ◽  
Repeated Load

Assessment of On-Sample Instrumentation for Repeated Load Triaxial Tests

1998 ◽  
Vol 1614 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Andrew R. Dawson ◽  
Simon D. Gillett
Keyword(s):  
Granular Materials ◽  
Comparative Studies ◽  
Measurement Process ◽  
Triaxial Tests ◽  
Triaxial Testing ◽  
Unbound Granular Materials ◽  
Repeated Load ◽  
Pavement Construction ◽  
Repeated Load Triaxial

Five laboratories have been involved in a series of comparative studies of the repeated load triaxial testing of soils and unbound granular materials as found in the lower layers of pavement construction. These comparisons with soil, granular materials, and an artificial specimen are outlined. The performance of the varied types of instruments that measure both axial and radial deformations is assessed, with particular attention to the fixing arrangements, instrument limitations, and weight. On the basis of the information presented, recommendations are given about the most appropriate types of instrument. No universal type is recommended, and it is clear that some variation in performance is an inevitable consequence of the measurement process.

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