Stress-strain and failure modes of asphalt concrete in compression due to geometrical changes

Leon, Lee P.; Simpson, Nicola; Edwin, Shian

doi:10.5592/co/cetra.2018.846

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to “Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering” (JTG E20-2011) [ 24 ] and related literature on the dynamic behaviors of asphalt concrete at various temperatures [ 1 , 9 ], the samples in the uniaxial compression tests are usually cylinders and prisms. The test results exhibited in the conference show that the effects of geometry do not affect the stress-strain behaviors of asphalt concrete under uniaxial compression [ 25 ]. And there is a common pattern of stress-strain curves identified into three stages: initial bottom concave part, an ascending branch followed by a descending branch [ 25 ].…”

Section: Experimental Programmentioning

confidence: 99%

“…The test results exhibited in the conference show that the effects of geometry do not affect the stress-strain behaviors of asphalt concrete under uniaxial compression [ 25 ]. And there is a common pattern of stress-strain curves identified into three stages: initial bottom concave part, an ascending branch followed by a descending branch [ 25 ]. Limited by the hydraulic servo device, according to “Test code for hydraulic asphalt concrete” [ 23 ] and the sample processing method that the cylinder cores are cut into cube specimens using the laboratory saw [ 26 ], the hydraulic asphalt concrete specimens are processed as cubes with side length of 100 mm.…”

Section: Experimental Programmentioning

confidence: 99%

See 1 more Smart Citation

Uniaxial Dynamic Compressive Behaviors of Hydraulic Asphalt Concrete under the Coupling Effect between Temperature and Strain Rate

Tang

Liu

et al. 2020

Materials

View full text Add to dashboard Cite

To investigate the compressive dynamic properties of hydraulic asphalt concrete under various temperatures, four temperatures and four strain rates have been set to perform the uniaxial compression experiments using hydraulic servo machine in this paper. The influence of temperature and strain rate on the failure modes, stress-strain curves and mechanical characteristic parameters of hydraulic asphalt concrete is analyzed and the results reveal that the failure modes and stress-strain curves have significant temperature effect. When the temperature is between −20 °C and 0 °C, the failure mode is dominated by brittle failure of asphalt binder, and hydraulic asphalt concrete shows obvious strain softening. With the addition of temperature, the failure modes of specimens are transferred from brittle failure to ductile failure since the asphalt changes from elastic-brittleness to viscoelasticity. Influenced by temperature effect, the compressive stress-strain curves of hydraulic asphalt concrete show strain hardening while the peak stress of hydraulic asphalt concrete is obviously decreased, and the variation coefficient of peak stress has a power relation with temperature. With successive increases in strain rate, the stress-strain curves of hydraulic asphalt concrete gradually are transferred from strain hardening to strain softening. The peak stress and stiffness modulus of specimens under compression gradually increase, and the dynamic increase factor of peak stress is linearly related with the logarithm value of strain rate after dimensionless treatment. In terms of the quantitative analysis of the experimental data, two relationship models of the coupling effect between temperature and strain rate are proposed. The proposed models have good applicability to the quantitative analysis of the experimental results in the manuscript. This paper offers important insights into the application and development of hydraulic asphalt concrete in hydraulic engineering.

show abstract