Mechanism and Rheological Properties of High‐Modulus Asphalt

Xu, Xinquan; Lu, Guilin; Yang, Jun; Liu, Xinhai

doi:10.1155/2020/8795429

Cited by 13 publications

(5 citation statements)

References 21 publications

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“…High-modulus bitumen concrete (HMAC) was first mentioned in France in the 1960s and then high-modulus agent (HM)-modified bituminous mixtures were used in extremely high traffic conditions [33][34][35]. Xu et al [36] reported that when HMAC is applied to the middle surface layer, it can bear the maximum shear stress generated by vehicle load better and thus reduce rutting.…”

Section: Introductionmentioning

confidence: 99%

Optimal Decision Making for Polymer-Modified Bitumen Mixture Based on Fuzzy Comprehensive Evaluation

Wang,

Qin,

Zou

et al. 2023

Applied Sciences

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With the increase in traffic load, the rutting problem of bitumen pavement appears more and more frequently, and the shear resistance of pavement has attracted more and more attention. A polymer-modified bituminous mixture is usually used to solve the problem of insufficient shear resistance in bitumen pavement. However, there are many polymer modifiers for bituminous mixture, which lead to different performances of the modified bituminous mixtures. Currently, the modification methods cannot obtain a bituminous mixture having all types of performance simultaneously. Therefore, considering the different performances and economics of modified bituminous mixtures, it is necessary to determine an optimal modification method for bitumen pavement. This study used a toll plaza in Jilin province, which is a seasonally frozen region. On this section of road, vehicles start and brake at high frequency, and the bitumen middle course suffers from large shearing forces. Therefore, permanent deformation is the main form of failure. In addition, low-temperature cracking of the bitumen pavement is also a very severe issue in this region. Four kinds of bituminous mixture modification schemes were selected and tested, and the pavement performance of these modified bituminous mixtures was evaluated. The fuzzy comprehensive evaluation method was used to quantitatively evaluate the performance level of bituminous mixtures according to fuzzy logic theory. Using the actual situation of the bituminous mixture used in the toll plaza, and based on the analytic hierarchy process method, the weight matrix of each service attribute was established. Here, the weight of each index was calculated by combining the entropy weight (EW) method, reducing the influence of subjective factors. According to the evaluation result of the fuzzy comprehensive evaluation model, it could be seen that the modified bituminous mixture (70#+M) had the best overall performance compared to the other bituminous mixtures.

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Section: Introductionmentioning

confidence: 99%

Optimal Decision Making for Polymer-Modified Bitumen Mixture Based on Fuzzy Comprehensive Evaluation

Wang,

Qin,

Zou

et al. 2023

Applied Sciences

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“…At present, the research on high modulus asphalt in China mainly focuses on high modulus modification mechanism and asphalt performance indexes improvement. Xu et al studied the modification mechanism of high modulus asphalt by means of rheology and microscopic methods and found that high modulus agent particles could expand into polymer chains in asphalt, which improved the viscoelasticity of asphalt [6]. Wang et al studied the microscopic molecular structure of high-molecular-weight polyethylene high modulus asphalt, modified polyethylene molecular, and asphalt combined uniformly and densely, which showed good compatibility [7].…”

Section: Introductionmentioning

confidence: 99%

Classification of Performance Grades of High Modulus Asphalt and Its Mixture: Taking China as an Example

Zhou

Duan

Gao³

et al. 2022

Advances in Materials Science and Engineering

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With the increase in traffic volume and axle load, the requirement of road quality is continuously improving, and high modulus asphalt has attracted the attention of researchers due to its excellent road service performance and economic benefits. In order to further improve the durability and use quality of Chinese roads, realize the scientific evaluation of the performance of high modulus asphalt and its mixture, and further promote the development of high modulus asphalt technology in China, the performance indexes of high modulus asphalt and its mixture in China were comprehensively investigated. The differences in high- and low-temperature performance of matrix asphalt, basic modified high modulus asphalt, and composite modified high modulus asphalt were compared and evaluated. Based on the results of mathematical statistics and the relevant specifications of high modulus asphalt in China, the performance grades of high modulus asphalt and its mixture were proposed. The results showed that compared with the basic asphalt, the softening points of the basic modified high modulus asphalt and the composite modified high modulus asphalt were increased by 18.76% and 82.89%, respectively, and the rutting factors were increased by 2 and 9 times, respectively, but the improvement effect of the low-temperature performance of the high modulus asphalt was not obvious. Based on the data statistics node and relevant Chinese regulations, high modulus asphalt and its mixtures were divided into four grades: excellent, good, fair, and poor, aiming to provide scientific suggestions for the wide application of high modulus asphalt.

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“…High-modulus asphalt concrete (HMAC) has numerous advantages in comparison to conventional asphalt concrete, such as increased resistance to permanent deformations and increased pavement fatigue life [ 1 , 2 ]. However, previous studies [ 3 , 4 ] have shown that the construction of road pavements with HMAC may significantly increase the risk of low-temperature cracking of those pavements.…”

Section: Introductionmentioning

confidence: 99%

Field Evaluation of High Modulus Asphalt Concrete Resistance to Low-Temperature Cracking

2022

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High-modulus asphalt concrete has numerous advantages in comparison to conventional asphalt concrete, including increased resistance to permanent deformations and increased pavement fatigue life. However, previous studies have shown that the construction of road pavements with High Modulus Asphalt Concrete (HMAC) may significantly increase the risk of low-temperature cracking. Those observations were the motivation for the research presented in this paper. Four test sections with HMAC used in base and binder courses were evaluated in the study. Field investigations of the number of low-temperature cracks were performed over several years. It was established that the number of new low-temperature cracks is susceptible to many random factors, and the statistical term “reversion to the mean” should be considered. A new factor named Increase in Cracking Index was developed to analyze the resistance of pavement to low-temperature cracking. For all the considered field sections, samples were cut from each asphalt layer, and Thermal Stress Restrained Specimen Tests were performed in the laboratory. Correlations of temperature at failure and cryogenic stresses with the cracking intensity observed in the field were analyzed. The paper provides practical suggestions for pavement designers. When the use of high modulus asphalt concrete is planned for binder course and asphalt base, which may result in lower resistance to low-temperature cracking of pavement than in the case of conventional asphalt concrete, it is advisable to apply a wearing course with improved resistance to low-temperature cracking. Such an approach may compensate for the adverse effects of usage of high modulus asphalt concrete.

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Mechanism and Rheological Properties of High‐Modulus Asphalt

Cited by 13 publications

References 21 publications

Optimal Decision Making for Polymer-Modified Bitumen Mixture Based on Fuzzy Comprehensive Evaluation

Optimal Decision Making for Polymer-Modified Bitumen Mixture Based on Fuzzy Comprehensive Evaluation

Classification of Performance Grades of High Modulus Asphalt and Its Mixture: Taking China as an Example

Field Evaluation of High Modulus Asphalt Concrete Resistance to Low-Temperature Cracking

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