Evaluation of self-healing properties of asphalt mixture containing steel slag under microwave heating: Mechanical, thermal transfer and voids microstructural characteristics

Liu, Jianan; Zhang, Tonghuan; Guo, Haoyan; Wang, Zhenjun

doi:10.1016/j.jclepro.2022.130932

Cited by 60 publications

(15 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It shows that the accumulation of irreversible damage may be more reflected in the “self-healing failure” of large voids (that is, no longer rebounding to a smaller value). The small voids continue to grow into large voids, and no longer being self-healing and the recovery may be the root causes of repeated freeze–thaw iterations [ 41 ]. In order to further understand this law, the probability distribution of the

was explored.…”

Section: Resultsmentioning

confidence: 99%

Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Jing

Liu

2022

Materials

Self Cite

View full text Add to dashboard Cite

Freeze–thaw cycle is one of the main distresses of asphalt pavement, and the law of freeze–thaw damage has always been an important topic. In this paper, X-ray computed tomography (CT) of asphalt mixture before and after freezing and thawing was carried out, and its two-dimensional (2D) digital image was recognized. Firstly, the eigenvalues of internal voids of asphalt mixture are extracted. Then the distribution of internal voids was analyzed. Finally, the evolution law of internal voids was summarized. The research results show that the characteristic mean value of the 9th cycle is the irreversible limit of freeze–thaw damage, and the non-resilience after the large void area increases is the fundamental reason for the accumulation of freeze–thaw damage. The source of void damage shifts from large voids to small voids, and the middle-stage is a critical stage of freeze–thaw damage. This work quantitatively evaluates the internal freeze–thaw damage process of asphalt mixture, and a morphological theory of the evolution of void damage based on an equivalent ellipse is proposed, which is helpful for better understanding the freezing–thawing damage law of asphalt pavement.

show abstract

was explored.…”

Section: Resultsmentioning

confidence: 99%

Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Jing

Liu

2022

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Rejuvenators are usually oil-based softening additives with a high content of light components, which can be added to the extracted aged bitumen or directly sprayed on the RAP itself. Utilizing the rejuvenated bitumen can fix the rheological, mechanical, thermal, and structural properties of the sample, which encourages the use of RAP in HMA production [19][20][21][22][23][24][25][26]. Some rejuvenators provide utilization of RAP content up to 100% however some are failed to meet the Marshall mix design criteria when used on high RAP content.…”

Section: Introductionmentioning

confidence: 99%

Feasibility and mixture performance assessment of waste oil based rejuvenators in high-RAP asphalt mixtures

Özdemir

Dokandari

Raufi

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

Asphalt pavements are amongst the most recycled materials in the contemporary world depending on the environmental and financial advantages. The introduction of Recycled Asphalt Pavement (RAP) on newly produced asphalt pavement is possible by the utilization of rejuvenating agents, which should contain oily fractions. For this purpose, within the scope of this study, three types of agents with optimum amounts (by weight of bitumen) were utilized 5.4% Waste Engine Oil (WEO), 5.1% Waste Vegetable Oil (WVO), and 6.8% Commercial Rejuvenating Agent (CRA). The highest applicable RAP content in mixtures depends on the rejuvenator type determined by Marshall Mix Design tests (air voids, flow, and stability). Rejuvenation facilitated the use of 50 to 60% of additional RAP material in the mixtures depending on the rejuvenator type. Indirect Tensile Strength (ITS) test results declared that RAP mixtures, when subjected to the rejuvenation process, resulted in relatively less brittleness and enhanced durability properties compared to the unmodified ones. Additionally, cost comparison analyses demonstrated encouraging results as the cost-benefit ratio exceeded up to 55% for mixtures involving high percentages of rejuvenated RAP. As a final analysis, Return on Investment (ROI) values were calculated for each rejuvenator type by the cost of upgrading the facility to handle RAP and the profit of RAP usage. Consequently, ROI was calculated as a return time in months, which unveils an extremely profitable opportunity in the industry.

show abstract

“…Asphalt pavement consists of aggregates, fillers, and asphalt binders; the design of asphalt binders and research on its related properties remain at the core of asphalt pavement [1,2]. Using an asphalt binder with excellent properties can remarkably improve the quality of asphalt pavement [3,4]. With the increasing traffic load, a neat asphalt binder will not be enough to fulfill the requirements of traffic development [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Giacomo et al observed that a high-content SBS modifier was able to lessen the ageing-induced stiffening of SBSMA. Compared to typical SBSMA with a lower polymer concentration, the SBS modifier network in the high-content SBSMA could present a barrier to the oxidation of the binder, leading to better anti-ageing performance [3,25].…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic Behavior and Phase Structure of High-Content SBS-Modified Asphalt

et al. 2022

View full text Add to dashboard Cite

To investigate the effect of styrene-butadiene-styrene (SBS) modifier content on the viscoelastic behavior of SBS-modified asphalt (SBSMA) at different temperatures and phase structures, the star SBS modifier was chosen to fabricate seven types of SBSMA with different contents. Multiple stress creep recovery (MSCR), linear amplitude sweep (LAS), and low-temperature frequency sweep tests were adopted to study the influence of SBS modifier content on the viscoelastic performance of SBSMA at high to low temperatures. The SBSMA’s microstructure with different contents was investigated using a fluorescence microscope. The results indicated that the change in non-recoverable creep compliance and creep recovery rate was bounded by 4.5% content at high temperatures, with an apparent turning point. The changing slope of content at less than 4.5% was much higher than that of the content greater than 4.5%. At medium temperatures, the fatigue life of SBSMA increased exponentially with the rising modifier content. The rate of increase in fatigue life was the largest as the content increased from 4.5% to 6.0%. At low temperatures, the low-temperature viscoelastic property index G (60 s) of SBSMA decreased logarithmically as the modifier content increased. In terms of the microscopic phase structure, the SBS modifier gradually changed from the dispersed to the continuous phase state with the increasing SBS modifier content.

show abstract

Evaluation of self-healing properties of asphalt mixture containing steel slag under microwave heating: Mechanical, thermal transfer and voids microstructural characteristics

Cited by 60 publications

References 30 publications

Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Feasibility and mixture performance assessment of waste oil based rejuvenators in high-RAP asphalt mixtures

Viscoelastic Behavior and Phase Structure of High-Content SBS-Modified Asphalt

Contact Info

Product

Resources

About