Study of Viscoelastic Specific Mechanism of Asphalt Mixture Based on Generalized Elastic Modulus Correction Model

Xiao, Minmin; Li, Chunyan; Zhu, Xingyi; Yang, Liming; Dong, Jinyong

doi:10.1007/s40996-023-01191-x

Cited by 1 publication

(1 citation statement)

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“…The viscoelastic characteristics of the asphalt mixtures are characterized by the combination of multiple basic mechanical elements such as elastic elements (springs) and viscous elements (sticky pots). The common viscoelastic models include the Kelvin, Maxwell, and Burgers models and so on [42][43][44]. Among them, the Burgers model is obtained by connecting the Kelvin model and the Maxwell model in series, which can well reflect the creep and relaxation characteristics of the asphalt mixture [45,46], as seen in Figure 11.…”

Section: Asphalt Constitutive Relation and The Burgers Modelmentioning

confidence: 99%

Investigation on the Performance of Modified Corn Stalk Fiber AC-13 Asphalt Mixture

Wang,

Qu,

Tang

et al. 2024

Coatings

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As an agricultural waste, a large amount of corn stalk will cause environmental pollution. In order to realize the resource utilization of waste and meet the strict requirements of modern traffic on pavement strength and durability, it was modified and applied to an AC-13 asphalt mixture to study its influence on the road performance of asphalt mixture and its mechanism. The road performances of modified corn stalk fiber, lignin fiber, and ordinary asphalt mixtures were evaluated via the wheel tracking test, low-temperature bending test, water immersion Marshall test, freeze–thaw splitting test, and fatigue test. Based on the results of three-point bending fatigue test, the viscoelastic parameters and indexes of the fiber asphalt mixture were obtained by fitting the loading specimen and deflection data with the Burgers constitutive model, and the creep strain response was analyzed by applying dynamic load, so as to explore the relationship between the viscoelastic characteristics and creep behavior of modified corn stalk fiber and AC-13 mixture. The long-term high-temperature performance test of the asphalt mixture with the best fiber content was carried out by using the long-term pavement intelligent monitoring equipment independently developed by the group of investigators. According to the findings, the ideal fiber contents for modified corn and lignin in asphalt mixture are 0.2% and 0.3%, respectively. Among them, the modified corn stalk fiber with a 0.2% content has the best effect on road performance, viscoelastic performance, and the asphalt mixture’s creep behavior under dynamic load. Compared with the 0.3% lignin fiber asphalt mixture, its dynamic stability, bending stiffness modulus, immersion residual stability, freeze–thaw splitting strength ratio, and loading times at failure increased by 19.9%, 18.28%, 4.19%, 8.6%, and 9.15%, respectively. Compared with ordinary asphalt mixture, it increased by 47.0%, 28.72%, 7.65%, 15%, and 75.81%, respectively. Moreover, when modified corn stalk fiber is added at 0.2%, the viscoelastic delay time of asphalt mixture is the longest, the strain peak value and rut depth are at a minimum, and the viscoelastic properties, creep properties, and long-term high-temperature properties are the best.

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Section: Asphalt Constitutive Relation and The Burgers Modelmentioning

confidence: 99%