Laboratory investigation on blending process of reclaimed asphalt mixture

Li, Ning; Tang, Wei; Yu, Xin; He, Zhan; Wang, Xin; Wang, Zhongyuan

doi:10.1016/j.conbuildmat.2022.126793

Cited by 18 publications

(5 citation statements)

References 37 publications

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“…The result signifies that the model accurately reflects the actual results with high precision. Removing the non-significant terms, the functions of creep rate and stiffness modulus are presented in Equations ( 9) and (10), respectively. 1 presents a response surface plot showcasing the outcomes of the penetration test.…”

Section: Test Results and Analysis Of Flexural Creep Stiffness Of Asp...mentioning

confidence: 99%

“…The plant-mix hot recycled technology of RAP encompasses a multitude of advantages, including the reutilization of waste materials; the conservation of non-renewable resources, such as mineral aggregate and asphalt; and the fulfillment of the requirements for low carbon development. Moreover, its construction process is straightforward, leading to its increasing popularity [9,10]. Numerous scholars have delved into the hot recycled technology of RAP.…”

Section: Introductionmentioning

confidence: 99%

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Optimization Design and Mechanical Performances of Plant-Mix Hot Recycled Asphalt Using Response Surface Methodology

Liu,

Wang,

et al. 2023

Materials

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This study aimed to explore the influence of material design parameters on the physical and mechanical properties of recycled asphalt. A Box–Behnken design was employed to determine the optimal preparation scheme for 17 groups of recycled asphalt. The effects of styreneic methyl copolymer (SMC) regenerant content, styrene–butadiene–styrene (SBS)-modified asphalt content, and shear temperature on the mechanical properties of recycled asphalt were analyzed using conventional and high/low-temperature rheological tests. The optimal processing parameters were determined by a response surface model based on multiple response indexes. The results revealed that the SBS-modified asphalt content had the most significant effect on the penetration of recycled asphalt. An increase in SMC regenerant content led to a gradual decrease in the rutting factor, while SBS-modified asphalt content had the opposite effect. The usage of SMC regenerant helped to reduce non-recoverable creep compliance by adjusting the proportion of viscoelastic–plastic components in recycled asphalt. Furthermore, the stiffness modulus results indicated that the addition of SMC regenerant improved the recovery performance of recycled asphalt at a low temperature. The recommended contents of SMC regenerant and SBS-modified asphalt are 7.88% and 150%, respectively, with a shear temperature of 157.7 °C.

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Section: Test Results and Analysis Of Flexural Creep Stiffness Of Asp...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization Design and Mechanical Performances of Plant-Mix Hot Recycled Asphalt Using Response Surface Methodology

Liu,

Wang,

et al. 2023

Materials

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“…This cost-efficiency can be achieved though optimizing technological and logistics processes. The existing research results are focusing on the technological aspects of blending processes in different fields of manufacturing (oil blending [5], metallurgical industry [14], asphalt mixtures [19]) and they do not take the impact of logistics aspects on the performance of the blending process into consideration. The technological aspects are deeply analyzed in a wide range of articles (aging characteristics in blending processes [61], experimental and discrete element models in blending processes [62], recycling aspects in blending [63], monitoring and sensoring of blending processes [64,65]).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…The majority of the blending processes-related articles focus on the technological aspects including solvent-evaporation technique [5], oil blending [6], pharmaceutical industry [7], gasoline blending [8], coal mixing [9], polymeric blends [10,11], morphological, thermal and rheological tests in order to evaluate the miscibility and thermal stability of the polymers and their blends [12], conventional and chaotic mixing [13], alumina metallurgical industry [14], infrared chemical imaging [15], thermoplastic blends [16], cement mixing [17], blending of monolayer particle-coated powder [18], asphalt mixtures [19], two-step melt blending [20], clay blending process [21], expandable graphite composites [22], food industry [23][24][25], hydrocolloids [26], batch blending processes [27], continuous powder-blending processes [28], and nanoparticle distribution in blending processes [29].…”

Section: Content Analysismentioning

confidence: 99%

Supply Chain Design for Blending Technologies

Bányai

Veres

2022

Sustainability

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When optimizing blending technologies, the main objective is to determine the right mixing ratio of the raw materials, depending on the different qualities and costs of the raw materials available. It can be concluded that research is mainly focused on answering technological questions, and only very few studies take into account the logistics processes related to blending technologies, their design, cost-efficiency, utilization and sustainability including energy efficiency and environmental impact. Based on this fact, within the frame of this research the authors describe a new approach, extending the basic model of blending problems by adding new supply chain efficiency-related components that makes it possible to take logistics parameters related to the raw materials supply (available stocks, batch sizes, transport and storage costs, supply chain structure) into consideration. A mathematical model of this supply chain optimization problem for blending technologies is described including routing and assignment problems in the supply chain, while technological objectives are also taken into consideration as technological objective functions and constraints. The optimization problem described in the model is a problem with non-deterministic polynomial-time hardness (NP-hard), which means that there are no known efficient analytical methods to solve the logistics-related supply chain optimization of blending technologies. As a solution algorithm, the authors have used an evolutive solver and a new metrics, which improved the efficiency of the comparison of distances between solutions of routing problems represented by permutation arrays. The scenario analysis, which focuses on the integrated optimization of technological and logistics problems validates the model and evaluates the solution algorithm and the new metrics. Using the mentioned algorithm, the supply chain processes of the blending technologies can be improved from availability, efficiency, sustainability point of view.

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“…Most of the roads built in the early stages of development have gradually entered the maintenance period. Asphalt pavement recycling technology conforms to the concept of sustainable development and green highway construction and is gradually being popularized and applied [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Study of Decay Mechanisms and Rules of Recycled Asphalt Pavement via a Full-Scale Experiment

Xia,

Gao,

Zhang

et al. 2023

Coatings

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Under the influence of long-term vehicle loads and large attenuation degrees, asphalt pavement performance gradually decreases, which leads to failure in fulfilling the appropriate requirements and, in turn, may affect driving safety. The purpose of this paper was to study the attenuation mechanism and rule of styrene–butadiene–styrene (SBS)-modified recycled asphalt pavement, so as to determine the applicable position and rational utilization of recycled asphalt mixture. To achieve this goal, two structures were designed, and full-scale experiments were carried out. The performance of the field test road based on accelerated loading testing (ALT) was analyzed through field monitoring data. The fatigue characteristics of stone matrix asphalt-13 (SMA-13) and asphalt concrete-20 (AC-20) mixtures before and after accelerated loading were studied via the trabecular bending fatigue test and dynamic modulus test. The microscopic components in the asphalt mixtures were determined via thin-layer chromatography on chromarods with flame ionization detection (TLC-FID). The results showed that the fatigue properties of recycled asphalt mixture can meet the requirements of ordinary asphalt mixtures and meet the technical standards of asphalt pavement design. With the increase in loading times, the British pendulum number (BPN) value of the two structures tended to be stable, and the BPN of Plan 2 was six less than that of Plan 1. Under the same test conditions, the fatigue life sequence of the recycled asphalt mixture under different loading frequencies was 20 Hz > 10 Hz > 5 Hz. The contents of four components in the reclaimed asphalt mixture were similar to those in the ordinary asphalt mixture. The light component of the reclaimed asphalt mixture of SMA-13 was reduced by 11.69%, and the light component of the ordinary asphalt mixture of SMA-13 was reduced by 15.29% through the full-scale test. In summary, recycled asphalt mixture should not be applied to the upper layer of pavement but can be rationalized in the middle layer and the bottom layer of pavement.

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Laboratory investigation on blending process of reclaimed asphalt mixture

Cited by 18 publications

References 37 publications

Optimization Design and Mechanical Performances of Plant-Mix Hot Recycled Asphalt Using Response Surface Methodology

Optimization Design and Mechanical Performances of Plant-Mix Hot Recycled Asphalt Using Response Surface Methodology

Supply Chain Design for Blending Technologies

Study of Decay Mechanisms and Rules of Recycled Asphalt Pavement via a Full-Scale Experiment

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