Shear behavior of hydraulic asphalt concrete at different temperatures and strain rates

Wang, Weibiao; Hu, Kai; Feng, Shaokong; Li, Gang; Höeg, Kaare

doi:10.1016/j.conbuildmat.2019.117022

Cited by 26 publications

(16 citation statements)

References 11 publications

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“…Hydraulic-rolled asphalt concrete is widely used in core walls in dams; however, its application in anti-seepage facings is limited to approximately 12 PSPSs in China [ 17 , 18 , 19 ]. Therefore, the knowledge and experience on the rolling asphalt concrete facings of PSPSs is insufficient in the matter of material selection and optimization, mixture design and construction.…”

Section: Introductionmentioning

confidence: 99%

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

Zou

Hua

et al. 2022

Materials

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The high and low-temperature performance of five hydraulic bitumen binders was evaluated using the dynamic shear rheometer (DSR) test, infrared spectrum test and direct tensile (DT) test. These hydraulic bitumen binders were respectively applied for several pumped storage power stations (PSPS) projects that were constructed or under construction. In order to relate the bitumen performance to the mixture performance, the slope flow test, three-point bending test and thermal stress restrained specimen test were carried out on hydraulic asphalt mixtures. The test results indicated the DSR rheological master curves can well distinguish the difference of each bitumen binder as well as the effect of polymer modification. Phase angle master curves, black diagrams and infrared spectra all indicated that several penetration-grade hydraulic bitumen binders were not virgin bitumen binders but were modified with relatively lower SBS polymer content when compared with traditional SBS-modified bitumen. When selecting the commonly used Karamay SG70 hydraulic bitumen as a reference, the normal SBS-modified bitumen was superior to other bitumen in terms of low- and high-temperature performance. Several slightly SBS-modified bitumen binders did not always show consistent results, which indicated that slightly modified bitumen may not really have the desired performance as expected. Therefore, SBS-modified bitumen will be more promising when dealing with extremely low or high temperatures. Bitumen performance was well compared with the mixture performance by using the bitumen creep, relaxation and tensile failure strain corresponding to the asphalt concrete slope flow, the maximum bending strain and the failure temperature, respectively. Compared with the traditional penetration, softening point and ductility test, it indicated that the DSR rheological test, creep test, direct tensile test and stress relaxation test can be used as more powerful tools for the characterization and optimization of hydraulic bitumen binders.

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Section: Introductionmentioning

confidence: 99%

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

Zou

Hua

et al. 2022

Materials

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“…A combination of quantitative and qualitative approaches is used to analyze the coupling effect between the strain rate and temperature on the dynamic increase factor of the peak compressive stress. The logarithmic value of the strain rate ratio after dimensionless treatment is linearly related to the dynamic increase factor, as shown in Equation (6). The parameters of equations at various temperatures are extracted to generate the relation between parameters and temperatures using the mathematical regression analysis in Figure 13.…”

Section: Discussionmentioning

confidence: 99%

“…To quantitatively analyze the dynamic compressive performance of hydraulic asphalt concrete, the dynamic increase factor of the peak compressive stress is considered to be linearly related with the logarithmic value of the strain rate ratio after non-dimensionless treatment in related literature [33], as shown in Equation (6). The relation between the dynamic increase factor and strain rate is obtained in Equations 7 As can be seen in Figure 7a, with increasing temperature, the peak compressive stress of hydraulic asphalt concrete gradually decreases under the same strain rate and the decrease of peak stress is reduced.…”

Section: The Dynamic Increase Factormentioning

confidence: 99%

“…Previous studies have explored the temperature effect on asphalt concrete. Akhtarpour et al [ 4 ], Feizi-khankandi et al [ 5 ], Wang et al [ 6 ] investigated the dynamic performance of hydraulic asphalt concrete employing shear tests, and the results reported that the shear modulus and shear strength of hydraulic asphalt concrete decrease with successive increase of temperature. S. Pirmohammad et al [ 7 ] carried out three-point fracture tests and found that the fracture resistance of hydraulic asphalt concrete first increased and then below a certain temperature (−20 °C) decreased.…”

Section: Introductionmentioning

confidence: 99%

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

Tang

Liu

et al. 2020

Materials

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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.

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“…Hydraulic asphalt concrete core walls, panels, and geomembranes are the main impermeable structures for pumped storage power plants [1][2][3], among which asphalt concrete core wall dams are widely used in water conservancy projects because of their simple structure, fast construction, and excellent impermeability with good deformation and seismic resistance [4][5][6]. During the construction process of an asphalt concrete impermeable core wall, the bond between core layers is the weak link of the core wall structure [7,8] and thus also the focus of construction, because hydraulic asphalt concrete has a strong temperature sensitivity [9][10][11]. Especially in low-temperature environments [12][13][14], asphalt concrete is most affected by temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Interlayer Bonding Temperature on the Bending Properties of Asphalt Concrete Core Wall

et al. 2023

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In the construction process of an asphalt concrete impermeable core wall, the interlayer bonding of the core wall is the weak link of the core wall structure and also the focus of construction, so it is important to carry out research on the influence of interlayer bonding temperature on the bending performance of an asphalt concrete core wall. In this paper, we study whether asphalt concrete core walls could be treated with cold-bonding by fabricating small beam bending specimens with different interlayer bond temperatures and conducting bending tests on them at 2 °C. The effect of temperature variation on the bending performance of the bond surface under the asphalt concrete core wall is studied through experimental data analysis. The test results show that the maximum value of porosity of bituminous concrete specimens is 2.10% at lower bond surface temperature of −25 °C, which does not meet the specification requirement of less than 2%. The bending stress, strain, and deflection of bituminous concrete core wall increase with the increase of bond surface temperature, especially when the bond surface temperature is less than −10 °C. If the lower bonding surface temperature is less than 10 °C, the upper layer of asphalt mixture with large grain size aggregate cannot be effectively buried in the low bond surface, resulting in flat fracture and brittle damage to the specimen, which is detrimental to construction quality; therefore, the bonding surface should be heated so that the temperature of the bottom bonding surface is 30 °C. If the lower bonding surface temperature is 10 °C or above, no heating is required.

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Shear behavior of hydraulic asphalt concrete at different temperatures and strain rates

Cited by 26 publications

References 11 publications

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

Evaluation on the Performance of Hydraulic Bitumen Binders under High and Low Temperatures for Pumped Storage Power Station Projects

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

Effect of Interlayer Bonding Temperature on the Bending Properties of Asphalt Concrete Core Wall

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