scholarly journals Mechanical properties of bituminous mixtures under sinusoidal cyclic loadings: Experiment and modelling

2021 ◽  
Vol 15 (2) ◽  
pp. 67-76
Author(s):  
Nguyen Quang Tuan
Keyword(s):  
Poisson’S Ratio ◽  
Complex Modulus ◽  
Thermal Sensitivity ◽  
Superposition Principle ◽  
Poisson's Ratio ◽  
Bituminous Mixture ◽  
Viscous Effects ◽  
Bituminous Mixtures ◽  
Complex Poisson’S Ratio ◽  
Linear Viscoelastic

Mechanical behaviour of bituminous mixtures is characterized by the great thermal sensitivity and the large viscous effects. This paper focuses on the linear viscoelastic (LVE) behaviour of bituminous mixtures that is considered for pavement design. The studied material is a GB3 mix (GB in French is “Grave Bitume”) which is often used for base course construction in France. Complex modulus tests are performed to determine the LVE properties of bituminous mix. Sinusoidal cyclic loadings in tension and compression for small strain amplitudes (up to 10-4 m/m) are applied on cylindrical samples at different temperatures (from -23.4°C to 39.1°C) and different frequencies (from 0.03 to 10Hz). The complex modulus E* and complex Poisson’s ratio ν* are obtained for these large ranges of temperature and frequency. From all these data, it is shown that within the linear viscoelastic domain and in the 3D case, the Time Temperature Superposition Principle (TTSP) is applicable and verified. A model with a continuum spectrum called 2S2P1D (2S2P1D means two Springs, two Parabolic elements, one Dashpot), developed at the Ecole Nationale des Travaux Publics de l’Etat (ENTPE), is used to simulate the 3D LVE behaviour of tested bituminous mixture. Keywords: linear viscoelasticity; bituminous mixture; modelling; complex modulus; complex Poisson’s ratio.

scholarly journals Recommendation of RILEM TC 237-SIB on complex Poisson’s ratio characterization of bituminous mixtures

2017 ◽  
Vol 50 (2) ◽  
Author(s):  
A. Graziani ◽  
H. Di Benedetto ◽  
D. Perraton ◽  
C. Sauzéat ◽  
B. Hofko ◽  
...  
Keyword(s):  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Bituminous Mixtures ◽  
Complex Poisson’S Ratio

Complex Poisson’s ratio of bituminous mixtures: measurement and modeling

2013 ◽  
Vol 47 (7) ◽  
pp. 1131-1148 ◽  
Author(s):  
Andrea Graziani ◽  
Maurizio Bocci ◽  
Francesco Canestrari
Keyword(s):  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Bituminous Mixtures ◽  
Complex Poisson’S Ratio

Effect of time–temperature, strain level and cyclic loading on the complex Poisson’s ratio of asphalt mixtures

2021 ◽  
Vol 294 ◽  
pp. 123564
Author(s):  
Quang Tuan Nguyen ◽  
Hervé Di Benedetto ◽  
Quang Phuc Nguyen ◽  
Thi Thanh Nhan Hoang ◽  
Van Phu Bui
Keyword(s):  
Cyclic Loading ◽  
Poisson’S Ratio ◽  
Asphalt Mixtures ◽  
Strain Level ◽  
Poisson's Ratio ◽  
Complex Poisson’S Ratio ◽  
Temperature Strain

scholarly journals Temperature Variability of Poisson’s Ratio and Its Influence on the Complex Modulus Determined by Dynamic Mechanical Analysis

Technologies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 81
Author(s):  
Vitor Carneiro ◽  
Helder Puga
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Poisson’S Ratio ◽  
Complex Modulus ◽  
Mechanical Analysis ◽  
Temperature Variability ◽  
Poisson's Ratio ◽  
Constant Frequency ◽  
Dynamic Mechanical ◽  
Characterization Of Materials

Dynamic mechanical analysis (DMA) is the usual technology for the thermomechanical viscoelastic characterization of materials. This method monitors the instant values of load and displacement to determine the instant specimen stiffness. Posteriorly, it recurs to those values, the geometric dimensions of the specimen, and Poisson’s ratio to determine the complex modulus. However, during this analysis, it is assumed that Poisson’s ratio is constant, which is not always true, especially in situations where the temperature can change and promote internal modification in the specimens. This study explores the error that is imposed in the results by the determination of the real values of complex moduli due to variable Poisson’s ratios arising from temperature variability using a constant frequency. The results suggest that the evolution of the dynamic mechanical analysis should consider the Poisson’s ratio input as a variable to eliminate this error in future material characterization.

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