Measurement of pore water pressure in asphalt pavement and its effects on permeability

Gao, Junqi; Guo, Chengcheng; Liu, Yutao

doi:10.1016/j.measurement.2014.11.013

Cited by 35 publications

(8 citation statements)

References 8 publications

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“…Asphalt pavement is a porous medium that consists of voids, aggregates and asphalt binder. The complex void structure in asphalt mixtures facilitates the abundant flow path for water (Kutay and Aydilek 2009;Gao et al 2015;Caro et al 2008;Kutay and Aydilek 2007). Figure 7 shows the water permeability coefficient of asphalt mixtures under different numbers of freeze-thaw cycles.…”

Section: Effect Of Freeze-thaw Cycles On the Water Permeabilitymentioning

confidence: 99%

Influence of Freeze–Thaw Cycles on Thermal Conductivity, Water Permeability and Mechanical Properties of Asphalt Mixtures

Gao

Fan

Ping

2020

Iran J Sci Technol Trans Civ Eng

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This research studied the effect of freeze-thaw cycles on the thermal conductivity, water permeability and mechanical properties of asphalt mixtures in the cold region. Three types of asphalt mixtures, namely a stone mastic asphalt (SMA) mixture, dense graded asphalt concrete (AC), asphalt-treated base (ATB) mixture, were produced in the laboratory. The thermal conductivity test and water permeability test were used to study the thermal conductivity and water permeability of asphalt mixtures, respectively. Meanwhile, the uniaxial compression test and indirect tensile test were carried out to investigate the mechanical properties of asphalt mixtures. The results showed that with the increase in the number of freeze-thaw cycles, the thermal conductivity and mechanical properties of all asphalt mixtures were weakened, while the water permeability of them was improved. In addition, the effect of freeze-thaw cycles on the thermal conductivity and mechanical properties of ATB mixture was more significant than that of SMA mixture and AC.

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Section: Effect Of Freeze-thaw Cycles On the Water Permeabilitymentioning

confidence: 99%

Influence of Freeze–Thaw Cycles on Thermal Conductivity, Water Permeability and Mechanical Properties of Asphalt Mixtures

Gao

Fan

Ping

2020

Iran J Sci Technol Trans Civ Eng

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“…The air voids were measured following the technical specification of CJJ/T190 CAU (2012) (Technical Specification for Permeable Asphalt Pavement) (CJJ/T190 CAU, 2012). The permeability of PAM is tested under water head pressure in many studies (Gao et al, 2015). In reality, however, no water head pressure is usually present when the water is drained from the pavement.…”

Section: Permeabilitymentioning

confidence: 99%

Performance Enhancement of Permeable Asphalt Mixtures With Recycled Aggregate for Concrete Pavement Application

Lei

Luo

et al. 2020

Front. Mater.

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The incorporation of recycled concrete aggregate (RCA) in permeable asphalt mixtures (PAMs) is an efficient method of utilizing construction demolished waste. It not only conforms to the trend of building sponge cities, but also alleviates the problem of overexploitation of natural aggregate resources. As the performance of PAM containing recycled aggregate is not comparable to natural aggregate, modification treatments and the addition of hybrid fibers are adopted as two enhancement methods to improve the performance of PAM with RAC in this study. It is found that replacing natural aggregate with recycled aggregate increases the optimum asphalt content (OAC) but decreases the residual stability. The OAC is increased by 45% when the RCA ratio is 100%, whereas applying silicone resin can give a 16.2% decrease in the OAC. Enhancing RCA with silicone resin can increase the water stability to be comparable with natural aggregate. Moreover, with modification treatment using calcium hydroxide solution, the mechanical strength of PAM is enhanced to even higher than that of natural coarse aggregate mixture alone. Improvements in both mechanical strength and water stability are also achieved by strengthening recycled aggregate with cement slurry, although the performance is less effective than using silicone resin. With the increase in the content of RCA, the permeability coefficients of PAM first decrease and then exhibit an increasing trend. The results indicate that the PAM with RCA and modification treatments can perform satisfactorily as a pavement material in practice. Applying probable modification, PAM incorporating RCA meets the criteria for use in concrete pavement applications.

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“…Existing research results indicate that there is a positive correlation between the pore water pressure and vehicle speed based on the fluid dynamics theory. However, most of the research could not directly reflect the pore water flow characteristics in pavement [15][16][17][18][19][20][21]. To investigate the flow characteristics of pore water directly, the three-dimensional (3D) reconstruction of asphalt pavement with actual pore structure becomes feasible and important in pavement research field.…”

Section: Introductionmentioning

confidence: 99%

Evaluation on Distribution Characteristics of Pore Water Pressure within Saturated Pavement Structure Based on the Proposed Tire-Fluid-Pavement Coupling Model

Zheng

Huang

et al. 2022

Advances in Materials Science and Engineering

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To investigate the flow characteristics of pore water in asphalt pavement and the variation law of the pore water pressure under vehicle loading, a novel method based on BA network and quartet structure generation set method was proposed to reconstruct the three-dimensional (3D) pavement model with pores. The permeability coefficient and the gradation curve were adopted to evaluate the reliability and stability of the random growth pavement model. Then, the tire-fluid-pavement coupling model was established with FLUENT 3D based on the fluid Mie–Gruneisen state equation. According to the built fluid-solid coupling model, the pressure-velocity coupled finite volume algorithm was applied to study the distribution of the pore water pressure in asphalt pavement. Results show that the pore water pressure in asphalt pavement decays periodically with time under vehicle loading. For different types of asphalt pavement, the pore water pressure in open-graded friction course (OGFC) pavement is the smallest during the whole process. Moreover, the peak values of the pore water pressure decrease in the order of asphalt concrete (AC) pavement, stone mastic asphalt (SMA) pavement, and OGFC pavement. The maximum negative value of the pore water pressure is generally less than 0.3 times the maximum positive values. As for saturated pavement pores, the pore water pressure is hardly affected by the water film thickness. The positive peak value of the pore water pressure increases on an approximate parabolic curve as the vehicle speed improves gradually, while the negative one remains largely unchanged. The results are expected to help reduce tire hydroplaning risk and provide guidance for the selection of asphalt mixtures of drainage asphalt pavement.

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Measurement of pore water pressure in asphalt pavement and its effects on permeability

Cited by 35 publications

References 8 publications

Influence of Freeze–Thaw Cycles on Thermal Conductivity, Water Permeability and Mechanical Properties of Asphalt Mixtures

Influence of Freeze–Thaw Cycles on Thermal Conductivity, Water Permeability and Mechanical Properties of Asphalt Mixtures

Performance Enhancement of Permeable Asphalt Mixtures With Recycled Aggregate for Concrete Pavement Application

Evaluation on Distribution Characteristics of Pore Water Pressure within Saturated Pavement Structure Based on the Proposed Tire-Fluid-Pavement Coupling Model

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