Investigation on the Micro Deformation Mechanism of Asphalt Mixtures under High Temperatures Based on a Self-Developed Laboratory Test

Li, Jilu; Guo, Wei; Meng, Anxin; Han, Meizhao; Tan, Yiqiu

doi:10.3390/ma13071791

Cited by 8 publications

(3 citation statements)

References 46 publications

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“…This makes asphalt pavement exhibit different distresses at different temperatures. For example, asphalt mixtures turn soft and show more viscous properties in high-temperature environments [6,7], making them prone to deformation and distress [8][9][10]. In addition to this, the low-temperature distress of asphalt pavement is particularly noticeable, especially in the Nordic regions.…”

Section: Introductionmentioning

confidence: 99%

Study on Multiple Effects of Self-Healing Properties and Thermal Characteristics of Asphalt Pavement

Zhang,

Sun,

Kong

et al. 2024

Buildings

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Asphalt pavements are prone to cracking in low-temperature environments, and microwave heating (MH) can heal the cracks effectively. This research mainly investigates the different MH effects on the self-healing properties of asphalt mixtures. With this objective, the three-point splitting test is conducted to generate the cracks. A microwave oven is employed to heat the samples, and a thermal camera measures the surface temperature. Results indicate that heating power and time show a positive linear correlation with healing efficiency, and the HI of the samples can reach over 80%. The HI of the samples decreases with the heating cycle, but the sample with reasonable power and time still has a HI higher than 70% after 5 cycles. The temperature peaks on thermal images indicate that uneven heating exists during heating, but the heating uniformity is within an acceptable range. The healing efficiency level (HEL) suggests that asphalt mixtures have very low inefficient healing behavior if the heating time is below 45 s, but HEL can reach 86.14% at 700 W after 60 s. Furthermore, although the HI of strength shows ideal results, the recovery of other crack parameters, including stiffness, fracture energy, flexible index, and crack resistance index, are not satisfactory.

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Section: Introductionmentioning

confidence: 99%

Study on Multiple Effects of Self-Healing Properties and Thermal Characteristics of Asphalt Pavement

Zhang,

Sun,

Kong

et al. 2024

Buildings

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“…The formation of ruts is one of the most types of common damage to asphalt surfaces [ 9 , 10 ]. This process depends primarily on the physical and mechanical properties of the used asphalt mixtures, the materials used in the pavement structure, climatic conditions, load characteristics and road traffic volume [ 5 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Type of Modified Binder on Stiffness and Rutting Resistance of Low-Noise Asphalt Mixtures

Pakholak¹,

Plewa²,

Gardziejczyk³

2021

Materials

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Low-noise asphalt mixtures are characterized by increased air void content. Their more open structure contributes to faster degradation within the operating temperature range. For this reason, binder modification is used in their production. The correct selection of modifiers allows one to significantly improve the technical properties of the mixtures. The article presents the results of tests of six types of mixtures: stone mastic asphalt (SMA8), porous asphalt (PA8), stone mastic asphalt reducing tire/road noise (SMA8 LA) and stone mastic asphalt reducing tire/road noise, with 10%, 20% and 30% content of rubber granulate (RG). Bitumen 50/70 modified with copolymer styrene butadiene styrene (SBS) and crumb rubber (CR) was used for the production of the mixtures. In order to determine the differences in the technical properties of the mixtures, the following parameters were tested: stiffness modules by indirect tensile testing of cylindrical specimens (IT-CY) in a wide range of positive temperatures, and resistance to permanent deformation using the British and Belgian methods with the use of double wheel tracker (DWT). The test results and their analysis confirmed that there was a significant improvement in the IT-CY stiffness modules of SBS and CR modified mixtures. Replacing more than 20% of coarse aggregate with RG causes a significant decrease in the stiffness of the mixture (by 90% in relation to the reference mixture SMA8 LA). The SMA mixtures obtained lower values of rutting resistance parameters (WTS and PRD) in water (Belgian method) compared to the results obtained in the air tests (British method). On the other hand, mixtures of PA, thanks to the compression of stresses in pores filled with water, obtained better results when the rutting resistance test was performed in the water (Belgian method).

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“…The quality of asphalt mix depends upon the morphology, densification and interlocking between the aggregate particles [6][7][8][9][10][11]. The performance of asphalt pavement is affected by the gradation of the aggregate [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fractured Aggregate Particles on Linear Stress Ratio of Aggregate and Resilience Properties of Asphalt Mixes—A Way Forward for Sustainable Pavements

et al. 2021

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The interlocking and packing of aggregate particles play a key role in achieving high level of linear viscoelastic properties and rutting resistance in asphalt mix for sustainable pavements. In this study, the quantitative effect of fractured aggregate particles (FAPs) on loading (i.e., 500 kPa normal stress), along with the resilience properties of asphalt mixes, was evaluated. Linear and nonlinear stress behaviors of aggregates (from direct shear test) and asphalt mixes (from resilient modulus test) were analyzed. A new quantitative parameter (linear stress ratio), i.e., linear stress (Pi)/maximum stress (Pmax), is proposed to be used in selection of aggregates for asphalt mixes. It was observed that 15.5% increase in FAPs caused 19.5% increase in ϕ and 70.7% increase in linear stress ratio (LSR). The same content of FAPs resulted in 29.4% and 36% increases in total resilient modulus (MRT) and 34.2% and 24.5% increases in instantaneous resilient modulus (MRI) for 0.1 and 0.3 s load durations, respectively. The proposed LSR is observed to be superior to conventionally used ϕ for aggregate resistance in design of flexible pavements.

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Investigation on the Micro Deformation Mechanism of Asphalt Mixtures under High Temperatures Based on a Self-Developed Laboratory Test

Cited by 8 publications

References 46 publications

Study on Multiple Effects of Self-Healing Properties and Thermal Characteristics of Asphalt Pavement

Study on Multiple Effects of Self-Healing Properties and Thermal Characteristics of Asphalt Pavement

Influence of Type of Modified Binder on Stiffness and Rutting Resistance of Low-Noise Asphalt Mixtures

Effect of Fractured Aggregate Particles on Linear Stress Ratio of Aggregate and Resilience Properties of Asphalt Mixes—A Way Forward for Sustainable Pavements

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