Study on meso-structural characteristics and homogeneity of asphalt mixture skeleton contacts

Lin, Bohuang; Shi, Liwan; Zhang, Xin; Liang, Hehao; Wang, Duanyi

doi:10.1016/j.cscm.2022.e01277

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…The prolongation of the M TI of the mixture could help to enhance the connection between the binder and the aggregate and improve the adhesion [33,34]. The specification (JTG F40-2004) requires that the M TI should be ≥45 s and that the M TI of the modified asphalt binder should be extended appropriately [23].…”

Section: Mixing Timementioning

confidence: 99%

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: Mixing Timementioning

confidence: 99%

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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“…However, the construction of asphalt pavement has always been one of the main sources of volatile organic pollutants. At present, the construction of asphalt pavements mainly adopts the hot mixing and hot paving method (Li et al, 2021;Lin et al, 2022;Shi et al, 2022). Asphalt generally needs to be heated to >160 °C, and even >175 °C if it is modified asphalt.…”

Section: Introductionmentioning

confidence: 99%

Influence of smoke suppressant on the smoke inhibition effect and properties of different types of asphalt

Liang

Zhao²,

et al. 2023

Front. Mater.

Self Cite

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The current understanding of the influence of smoke suppressants on the smoke inhibition effect and working performance of different types of asphalt is limited. In this study, portable gas detector (PGD) tests were used to investigate the influence of the smoke suppressant on different types of asphalt and the smoke purification effect. Subsequently, gas chromatography-mass spectrometry (GC-MS) was used to analyze the influence of the smoke suppressant on the volatile organic compounds (VOCs) in different types of asphalt fume, so as to compare and verify the PGD tests results. Finally, scanning electron microscopy and energy dispersive spectrometry were used to observe and analyze the influence of the smoke suppressant on the microstructure and element composition of different types of asphalt. The results show that the smoke suppressant can purify various harmful gases volatilized from different types of asphalt, but the effect and the optimal dosage of smoke suppressant are slightly different. The purification rate of the smoke suppressant for SO2 or H2S in the fumes of various asphalts can reach >70% and the NO and VOC purification rates can reach >40%. The influence of the smoke suppressant on the VOC purification rate of different asphalts detected through the GC-MS and PGD tests is similar. The smoke suppressant has little effect on the asphalt surface microstructure and on the changes in the element content in asphalt, indicating that it has no effect on the main properties of the asphalt itself. This study is helpful to further understand the relationship between smoke suppressants and the smoke inhibition effect and the working performance of different types of asphalt. Additionally, it provides basis and guidance for the development of low-smoke asphalt with a better emission reduction effect, which has a certain guiding and application significance.

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Evaluating reclaimed asphalt mixture homogeneity using force chain transferring stress efficiency

Yang

Tang

Cai

et al. 2023

Construction and Building Materials

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Study on meso-structural characteristics and homogeneity of asphalt mixture skeleton contacts

Cited by 5 publications

References 41 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

Influence of smoke suppressant on the smoke inhibition effect and properties of different types of asphalt

Evaluating reclaimed asphalt mixture homogeneity using force chain transferring stress efficiency

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