Evaluation of Fatigue Performance of Asphalt Based on Constant Strain DSR Test

Zhu, Hong; Yan, Erhu; Lu, Zhaofeng

doi:10.1088/1757-899x/170/1/012003

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The main reason for this phenomenon is that the increase in temperature makes the asphalt increase in volume and internal void volume, which increases the intermolecular spacing, decreases the intermolecular forces, decreases the asphalt's resistance to deformation, and gradually transforms the asphalt from an elastomer to a viscous body, thus making the complex modulus of all types of asphalt decrease while the phase angle increases (Zhu et al, 2017). Since the rutting factor of asphalt is derived from the equation G*/sin?, according to the equation, the rutting factor of asphalt is proportional to the complex modulus, and therefore the rutting factor decreases.…”

Section: Dsrmentioning

confidence: 99%

Optimization design and performance evaluation of a novel asphalt rejuvenator

2022

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The development of a regeneration agent is one of the key technologies for pavement regeneration and one of the methods to reduce carbon emissions in the transportation field, so it is very necessary to develop a regeneration agent. Based on the composition of asphalt and rejuvenator components, the optimal dosing of extraction oil, plasticizer dioctyl phthalate (DOP), and hydrogenated (carbon 9) C9 petroleum resin was determined by the response surface method, and the suitable dosing of the anti-aging agent was also designed to optimize the orthogonal experiment to prepare the ZJ-I (Zenith Yummy-Invent) rejuvenator with good overall performance. On the basis of the ZJ-I rejuvenator, dynamic shear rheology (DSR), bending beam rheometery (BBR), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and contact angle experiments were used to investigate the effects of the ZJ-I rejuvenator dosing on the high- and low-temperature rheology, chemical structure, surface microscopic morphology, and adhesion between asphalt and aggregate of aged asphalt and to explore the regeneration effect and regeneration mechanism of the ZJ-I rejuvenator. The results showed that the ZJ-I rejuvenator formulated with 83.6% extracted oil, 15% plasticizer DOP, 1.4% hydrogenated petroleum resin, 0.6% antioxidant, and 0.4% light stabilizer has the best regeneration effect, and its optimal dosing is 7% aging degree. It can also improve the adhesion performance of asphalt and aggregate.

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Section: Dsrmentioning

confidence: 99%

Optimization design and performance evaluation of a novel asphalt rejuvenator

2022

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“…Loutas T. H. carried out in-plane dynamic strain measurements for structural health monitoring [18]. Zhu H. Z. analyzed the influence of asphalt performance on the fatigue resistance performance of asphalt mixture based on strain test [19].…”

Section: Introductionmentioning

confidence: 99%

Research on dynamics of sorting arms with high frequency reciprocating motion

Jiang¹,

Li²,

He³

et al. 2018

J. vibroeng.

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The characters of high frequency reciprocating equipment are quick starting and stopping, short range, high frequency and multi-freedom reciprocating motion. The inertia introduced by the high frequency reciprocating motion of a LED chip sorter has complicated effects on the positional accuracy. It is necessary to obtain dynamics of the sorting arm to suppress the vibration of the high frequency operation. The positioning precision and positioning time are affected by the natural vibration of the sorting arm by analyzing the displacement response. The paper verifies that the inherent vibration of the sorting arm has a crucial effect on its positioning precision and positioning time. Under static condition, due to the additional mass of the accelerometers, the research results show that there is no obvious difference in the experimental modal analysis (EMA) based on multi-type sensors. The modal parameters identified by accelerometers and strain gauges are very close. The modal parameters are obtained through the modal analysis method, which combines the strain modal analysis and operational modal analysis (OMA), under high frequency reciprocating motion. The paper verifies that the modal parameters of lightweight structure are very different in the static and operation. The key points of each mode are found by analyzing the modal amplitudes at different speeds which provide the guiding principle and basis for the dynamic optimization of the sorting arm mechanism.

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