Materials, preparation, performances and mechanism of polyurethane modified asphalt and its mixture: A systematic review

Wang, Chaohui; Huang, Shuai; Chen, Qian; Ji, Xiaoping; Duan, Kaixi

doi:10.1016/j.jreng.2023.01.002

Cited by 9 publications

(8 citation statements)

References 38 publications

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“…The results reveal that DPAM had the best low-temperature flexibility. As mentioned in the FTIR test, the ether bond, C-O-C, in PU injected into the asphalt binder positively improved its flexibility [3,9,37]. Notably, the flexibility of WPAM was inferior to that of DPAM.…”

Section: High-and Low-temperature Performancementioning

confidence: 86%

“…Meanwhile, the ether bond, C-O-C, in PU was injected into the DPA and WPA binders, which was at 1115 cm −1 . The ether bond was characterized by low cohesive energy and easy rotation, which contributed to the improvement of the flexibility of the binder and mixture [3,9,37]. The results suggested that PU could fully react chemically during the preparation of DPAM, and it was feasible to prepare PU asphalt mixtures using the dry-mix method.…”

Section: Chemical Reactions In Pua Systemsmentioning

confidence: 99%

“…Specifically, the -NCO characteristic absorption peak at 2275 cm −1 in the PU disappeared. The reason is that, as shown in Equations ( 5) and ( 6), -NCO reacted with -NH 2 in MOCA and -OH in asphalt to produce isocyanurate and carbamate, and their characteristic absorption peaks were located at 1795 and 1725 cm −1 , respectively, which were essential for improving the high-temperature performance of the asphalt binder and mixture [9,37]. Meanwhile, the ether bond, C-O-C, in PU was injected into the DPA and WPA binders, which was at 1115 cm −1 .…”

Section: Chemical Reactions In Pua Systemsmentioning

confidence: 99%

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Construction Technology and Pavement Performance of Dry-Mix Polyurethane Modified Asphalt Mixtures: A Case Study

Sun,

Zhang,

Liu

et al. 2023

Sustainability

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Polyurethane Modified Asphalt Mixture (PUAM) has been confirmed to possess good engineering properties and is a potential replacement material for pavement construction. This study aimed to provide guidance for the promotion and application of PUAM in pavement engineering by exploring the construction technology and verifying the practicality. Dry-mix PUAM (DPAM), wet-mix PUAM (WPAM), and SBS-modified asphalt mixture (SBSAM) were prepared. After systematically investigating the construction process of the three mixtures, their pavement performance was comparatively evaluated. Subsequently, the DPAM was utilized to construct the trial pavement, and the completed pavement was tested and evaluated. Furthermore, the costs of the DPAM and SBSAM were analyzed. The results reveal that the construction technology had a significant effect on the mechanical properties of the mixtures. Compared with SBSAM, the optimum mixing temperature and time of the DPAM and WPAM were reduced. The mixing temperature, mixing time, and hitting number were recommended to be 160 °C, 60 s, and 75 times for the DPAM. Fourier Transform Infrared Spectroscopy tests confirmed that the PU reacted sufficiently in the binder. The DPAM exhibited good overall pavement performance, and its low-temperature cracking and fatigue resistance were significantly better than that of SBSAM. Meanwhile, all the pavement indexes constructed with DPAM met specifications, and the performance and service condition of the test road after the operation will be paid attention to continuously. Additionally, the cost of DPAM was close to that of SBSAM, and the more straightforward construction process and better pavement performance of DPAM could reduce the construction energy consumption and maintenance frequency, which was meaningful for promoting the scale application of DPAM and the sustainable development of transportation infrastructure.

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Section: High-and Low-temperature Performancementioning

confidence: 86%

Section: Chemical Reactions In Pua Systemsmentioning

confidence: 99%

Section: Chemical Reactions In Pua Systemsmentioning

confidence: 99%

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Construction Technology and Pavement Performance of Dry-Mix Polyurethane Modified Asphalt Mixtures: A Case Study

Sun,

Zhang,

Liu

et al. 2023

Sustainability

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“…Zhang et al [38] pointed out that selecting granular anti-freezing agents can alleviate the adverse effects of salt release on pavement performance. The impact of anti-freezing materials on the pavement performance of asphalt mixtures is mainly related to factors such as the dosage [39][40][41], type [42,43], application method [44], and gradation type [45] of deicing agents.…”

Section: Introductionmentioning

confidence: 99%

Study on the Long-Term Salt Release Characteristics of Self-Melting Ice Asphalt Mixtures and Their Impact on Pavement Performance

Liu,

Guo,

Sun

et al. 2024

Polymers

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Self-melting ice asphalt pavement materials inhibit pavement freezing and improve driving safety. This paper aims to study the long-term salt release characteristics of self-melting ice asphalt mixtures and the impact on pavement after complete salt release. Firstly, a method to accelerate the rapid release of salt based on the Los Angeles abrasion tester. Then, long-term salt release patterns were elucidated under the influence of deicing agent dosage, type of asphalt, and type of gradation. Finally, a quantitative analysis of the pavement performance after complete salt release is conducted. The results indicate that the release efficiency of the Los Angeles abrasion tester method has increased by 91 times compared to the magnetic stirrer immersion flushing method and by 114 times compared to the natural soaking method. The SBS-modified self-melting ice asphalt mixture possesses a longer duration of salt release, but the uniformity of salt release is inferior. Salt release duration is directly proportional to the dosage of deicing agents. SMA-13 self-melting ice asphalt mixture exhibits poorer uniformity in salt release. After complete salt release, high-temperature stability of self-melting ice asphalt mixtures decreased by 31.6%, low-temperature performance decreased by 15.4%, water stability decreased by 26.7%, and fatigue life decreased by 35.9%.

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“…In order to address the issues of matrix asphalt pavements, researchers have been working on enhancing the performance and durability of asphalt [11,12]. Modified asphalt serves as an effective solution widely employed in road projects.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Rheological Properties and Microscopic Mechanisms of Sasobit/Buton Rock Asphalt Modified Asphalt

Liu

Jiang

et al. 2023

Sustainability

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The objective of this study is to develop a modified asphalt with excellent rheology and workability. Buton rock asphalt (BRA) composite modified warm mix asphalt (BCMWMA) was prepared, and its rheological properties and micromechanisms were investigated. Initially, warm mix asphalt (WMA) was prepared using 3 wt% Sasobit, and then four BCMWMA samples were prepared by blending 5 wt% to 20 wt% of BRA (with 5 wt% intervals). Subsequently, the microscopic morphology and modification mechanism of BCMWMA were analysed by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) tests. Finally, the rheological properties of BCMWMA were examined through conventional properties tests, rotational viscosity tests (RV), dynamic shear rheological tests (DSR) and bending beam rheometer tests (BBR). The results indicate that the BRA and Sasobit composite modifications primarily involve physical modification. BRA improves the high-temperature performance of the modified asphalt but reduces its low-temperature performance. Overall, the BCMWMA exhibits excellent high-temperature performance and workability, contributing to the green and sustainable development of asphalt pavement engineering.

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Materials, preparation, performances and mechanism of polyurethane modified asphalt and its mixture: A systematic review

Cited by 9 publications

References 38 publications

Construction Technology and Pavement Performance of Dry-Mix Polyurethane Modified Asphalt Mixtures: A Case Study

Construction Technology and Pavement Performance of Dry-Mix Polyurethane Modified Asphalt Mixtures: A Case Study

Study on the Long-Term Salt Release Characteristics of Self-Melting Ice Asphalt Mixtures and Their Impact on Pavement Performance

Investigation on Rheological Properties and Microscopic Mechanisms of Sasobit/Buton Rock Asphalt Modified Asphalt

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