Laboratory evaluation of different bio-oil recycled aged asphalts: Conventional performances and microscopic characteristics

Peng, Xinghai; Xie, Nasi; Xia, Chengdong; Zhou, Xianhao; Zhao, Pei; Ma, Shaojie; Zhang, Chen; Lv, Songtao

doi:10.1016/j.jclepro.2023.139442

Cited by 17 publications

(4 citation statements)

References 31 publications

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“…When the brick aggregate content was 40%, the construction uniformity was good. (5) The recommended ratio of brick aggregate to recycled concrete aggregate for mixed recycled construction-solid-waste aggregate is 40% to 60%. The results show that the subgrade filling construction method, whereby a 22 t roller is used for compaction for five passes (two weak vibrations + two strong vibrations + one weak vibration) at a speed of 3 km/h in the main compaction stage, achieves better construction quality.…”

Section: Discussionmentioning

confidence: 99%

“…The traditional method for construction-solid-waste treatment is landfill, which not only occupies a large amount of land but is also harmful to the environment and human health [ 2 , 3 ]. In contrast, the utilization of renewable resources is an important process in clean production, and the utilization of construction waste could achieve sustainable development and environmental protection in the construction industry [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Brick Aggregate Content on Performance of Recycled Construction-Solid-Waste Aggregate

Zhu,

Ding,

et al. 2024

Materials

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In road engineering, road construction requires a large amount of natural aggregate; its substitution with recycled construction-solid-waste aggregate not only saves resources but also reduces the burden on the environment. The main components of construction solid waste are concrete blocks and brick slag; the breakability of the latter can affect the performance of mixed recycled aggregate, which hinders the use of construction solid waste in road engineering applications. To analyze the applicability of recycled construction-solid-waste aggregate containing brick slag aggregate in the subgrade layer, the effect of brick aggregate content on the CBR (California bearing ratio) and crushing value of mixed recycled aggregates was evaluated based on laboratory tests, and the field compaction quality of the recycled aggregates was analyzed. The results show that the 9.5–19 mm mixed recycled aggregate samples were crushed to a higher degree during the compaction process. A brick aggregate content less than 40% had little effect on the performance of mixed recycled construction-solid-waste aggregate. It is recommended to use a 22 t road roller for five passes (two weak vibrations + two strong vibrations + one weak vibration) at a speed of 3 km/h in the main compaction stage of the subgrade filling.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Brick Aggregate Content on Performance of Recycled Construction-Solid-Waste Aggregate

Zhu,

Ding,

et al. 2024

Materials

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“…In addition, the gradation design of epoxy asphalt mixture adopts a continuous dense gradation form in steel bridge deck pavement, which belongs to a suspended dense structure to prolong the fatigue performance and waterproof performance. Due to being too dense, epoxy asphalt pavements easily form bulges, which causes great construction difficulty to directly quote the research on steel bridge deck pavement systems [48][49][50][51]. The bulging problem of epoxy asphalt concrete has not been substantially solved.…”

Section: Introductionmentioning

confidence: 99%

Study of Low-Content Epoxy Asphalt Mixture Applied to the Road

Li,

Luo,

Wang

et al. 2024

Buildings

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To realize the application of epoxy asphalt concrete on roads and solve the problem of the high cost of epoxy asphalt concrete and the causes of bulging in the construction process, a low-content epoxy asphalt mixture was experimentally studied. Rheological and microscopic tests were carried out to study its performance. At the same time, 17 kinds of low-content asphalt mixture Marshall test pieces and rut plate test pieces with different oil stone ratios were made. Their road performances were tested, and a watertight breathable epoxy asphalt mixture was studied to solve the bulging problem. The research shows that, for ordinary roads, a content of epoxy resin of 10–15% can meet both the high-temperature and the low-temperature requirements. For sections with special rutting resistance requirements, a controlled epoxy resin content between 15 and 30% is recommended. When the content of epoxy resin is greater than 30%, epoxy asphalt initially forms a crosslinked spatial network. An epoxy asphalt with a complex structure from asphaltene to epoxy, with ultra-high performance, can be used for small steel bridge pavements. A BBR test showed that, with an increase in epoxy resin content, the low-temperature performance of asphalt gradually weakens. When the content was 20%, epoxy asphalt’s low-temperature performance was weaker than that of SBS-modified asphalt. Under extremely low-temperature conditions, the performance of epoxy asphalt could not meet the specifications. When the voids of low equivalent epoxy asphalt mixture are controlled at 4.1–4.5%, it is watertight and breathable; this can solve the problem of bulging and greatly reduce the cost of projects.

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“…In terms of materials, in order to enhance the pavement performance and make the materials more ecologically and energy-efficient, and ultimately to achieve the goal of a "carbon neutral" vision [6], the application of rubberized asphalt (RA) and its mixtures have been a prominent topic of study, with numerous researchers conducting in-depth investigations on it [7][8][9]. Rubberized asphalt is widely used in stress-absorbing layers and rutting-resistant sections of asphalt pavements due to its exemplary environmental performance, rutting resistance, and durability, thus prolonging the pavement's service life [10].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Dynamic Response of Asphalt Pavement Structures: Analysis Using the Classic Kelvin, Maxwell, and Three-Parameter Solid Models

He,

Lv,

Xie

et al. 2024

Buildings

Self Cite

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This study addressed the complex problems of selecting a constitutive model to objectively characterize asphalt mixtures and accurately determine their viscoelastic properties, which are influenced by numerous variables. Inaccuracies in model or parameter determination can result in significant discrepancies between the calculated and measured results of the pavement’s structural dynamic response. To address this, the research utilized the physical engineering principles of asphalt pavement structure to perform dynamic modulus tests on three types of high-content rubberized asphalt mixtures (HCRAM) within the surface layer. The research aimed to investigate the influencing factors of the dynamic modulus and establish a comprehensive master curve. This study also critically evaluated the capabilities of three viscoelastic models—the three-parameter solid model, the classical Maxwell model, and the classical Kelvin model—in depicting the dynamic modulus of HCRAM. The findings indicated a negative correlation between the dynamic modulus of the asphalt mixture and temperature, while a positive association exists between the loading frequency and temperature, with the impact of the loading frequency diminishing as the temperature increases. Notably, the three-parameter solid model was identified as the most accurate in describing the viscoelastic properties of the HCRAM. Furthermore, the dynamic response calculations revealed that most indexes in the surface layer’s dynamic response are highest when evaluated using the three-parameter viscoelastic model, underscoring its potential to enhance the pavement performance’s predictive accuracy. This research provides valuable insights into optimizing the material performance and guiding the pavement design and maintenance strategies.

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Laboratory evaluation of different bio-oil recycled aged asphalts: Conventional performances and microscopic characteristics

Cited by 17 publications

References 31 publications

Effect of Brick Aggregate Content on Performance of Recycled Construction-Solid-Waste Aggregate

Effect of Brick Aggregate Content on Performance of Recycled Construction-Solid-Waste Aggregate

Study of Low-Content Epoxy Asphalt Mixture Applied to the Road

Comparative Study on the Dynamic Response of Asphalt Pavement Structures: Analysis Using the Classic Kelvin, Maxwell, and Three-Parameter Solid Models

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