Effect of Rejuvenators on Performance and Microstructure of Aged Asphalt

A composite rejuvenator was used for the rejuvenation of aged asphalt in comparison with the common rejuvenator. The effects of the rejuvenators on the performance and microstructure of the aged asphalt were investigated by physical properties tests, dynamic shear rheometer and atomic force microscopy. The results indicate that the physical and rheological properties of the aged asphalt are restored more significantly by the composite rejuvenator than the common rejuvenator, which can be ascribed to the effective recovery of microstmcture of the aged asphalt. The composite rejuvenator has the potential to be used for the rejuvenation of severely aged asphalt since it can restore the colloidal structure of the aged asphalt effectively through composition regulation and chemical reactions between the composite rejuvenator and asphaltenes.

Evaluation of Mixture Performance Recycled Asphalt Pavement Materials as Base Layer with or without Rejuvenator into the Asphalt

The binder properties were determined in accordance with Chinese standard such as ductility test, which allowed to measure the distance in centimeters that a standard briquette of asphalt had been stretched before breaking. Then, penetration test was carried out in order to know some properties of the asphalt, which are the hardness and the softness. Finally, softening point test was carried out in order to determine the temperature at which the bitumen attains a particular degree of softening under the specification of the test. According to Chinese standard for performance tests, firstly, Marshall test was carried out in order to measure the theoretical density, air voids, voids filled with asphalt, stability, flow, and voids in mineral aggregate of asphalt specimens. Secondly, Freeze-thaw splitting test was carried out in order to determine Splitting strength ratio. Finally, dynamic stability (rutting) test was carried out to determine average dynamic stability. Beside the tests carried out, the gradation of the extracted aggregate in accordance with American Association of State Highway and Transportation Officials was carried out to determine the dimensions of the particles weight distribution. Furthermore, both the percentage of recycled asphalt pavement materials and binder in mixture were determined to know how much of the new material during the mixture was needed. However, two specimens were used to evaluate the performance of recycled asphalt pavement materials. One specimen of recycled asphalt pavement materials was ten years old, and another one of recycled asphalt pavement materials was five years old. The results show that the conditions of the environment such as moisture, temperature, and age, decrease the ductility and penetration properties of binder when increase the softening point property of binder. Then the gradation of recycled asphalt pavement aggregate is of the required values to reuse in the mixture, while the flow ratio, the splitting strength ratio, and the dynamic stability ratio, are less than the required value test. With regard to the properties of mixture of recycled asphalt pavement material binder with rejuvenator, the results show that when the penetration and ductility versus percentage of rejuvenator increase, softening point versus percentage of rejuvenator decreases. Also, when the bitumen and rejuvenator percentage increase, the air voids decrease. Consequently, voids filled with asphalt and voids in the mineral aggregate increase. Moreover, the theoretical density and stability values decrease in a mixture containing four-point fifty percent to six percent of bitumen and rejuvenator, whereas the flow values increase. More interestingly, with four percent to four-point fifty percent mixture ratio of bitumen and rejuvenator, density, stability, and flow values increase. The splitting strength ratio values of mixtures and the dynamic stability test (rutting test) values of mixtures with forty percent of specimen one and specimen two respectively are greater than the required value of the standard test. In addition, the high percentage of rejuvenator increases the rut of pavement, in the same manner, the low percentage of rejuvenator induces low rut. In conclusion, the binder content from recycled materials without rejuvenator seems not be sufficient to be reused on the new pavement while the aged recycled material seems to be performed better than no aged recycled material with rejuvenator into bitumen. Then, the rejuvenator can influence the bitumen properties and performance of the pavement. Finally, the pavement made by only recycled pavement materials as a base layer appears to be more economical but cannot be more effective than the pavement made by mixture of new and recycled pavement materials as a base layer.

A New Approach for Evaluating Rejuvenator Diffusing into Aged Bitumen

Rejuvenator diffusing into aged bitumen was evaluated by determining penetration and chemical components of aged bitumen with rejuvenator coat before and after diffusing experiment. Effects of temperature, time and viscosity of rejuvenator on the diffusing ability of rejuvenator into aged bitumen were investigated. Results indicated that the diffusing ability of rejuvenator into aged bitumen could be enhanced with the increasing of temperature and time, however, the diffusing of rejuvenator into aged bitumen would be restricted due to the volatilization of light component and aging of rejuvenator under high temperature （over 170 ℃）. Rejuvenator with low viscosity diffused into aged bitumen more easily.

Diffusion and Regeneration Mechanism of Waste Composite Oils Rejuvenator in Aged Asphalt

The physical performance of recycled asphalt was used as the main evaluation index to study the optimal range of a self-made rejuvenator.Through the penetration,viscosity and gel permeation chromatography(GPC)tests,the diffusion degree of the rejuvenator under different temperatures and time process was analyzed,and the diffusion efficiency of the rejuvenator was evaluated from the macro and micro perspective.The regeneration mechanism of the rejuvenator in the aged asphalt was also analyzed using the Fourier transform infrared spectroscopy(FTIR),scanning electron microscope(SEM)and chemical composition tests.The research results showed that the optimum rejuvenator content was about 3%.Higher temperature and longer time were beneficial to improving the permeability and diffusion of the rejuvenator.During the aging process,the light components were reduced,and more macromolecular asphaltenes were generated as well as a large number of carbonyl and sulfoxide.After diffusion and regeneration,the light components in the asphalt were supplemented,the wrinkles and gullies of the aged asphalt were almost improved to the surface state of the matrix asphalt.

Recent advances in calcium alginate hydrogels encapsulating rejuvenator for asphalt self-healing

The inherent self-healing ability of asphalt is insufficient and fails to timely repair the cracks due to the combined effect of temperature variation,air oxidation,ultraviolet exposure and traffic loading.Rejuvenator encapsulation based on self-healing asphalt is a green sustainable preventive maintenance technology for asphalt pavement.During the last decade,rejuvenator encapsulation for asphalt self-healing has been a research hotspot and calcium alginate hydrogels encapsulating rejuvenator is a promising self-healing technology.Hence,this review sheds light on the recent advances of calcium alginate hydrogels encapsulating asphalt rejuvenator including selfhealing capsules and fibers.The synthesis methods of calcium alginate capsules and fibers containing rejuvenator were elaborately introduced,and their surface morphology,interior structure,mechanical strength,thermal stability,rejuvenator content,distribution and survival in asphalt materials were systematically analyzed.Besides,the effect of capsules and fiber on the mechanical property and pavement performance of asphalt concrete were explored.Additionally,a comprehensive review about the effect of calcium alginate capsules and fibers on selfhealing ability of asphalt materials were presented,and the rejuvenator release mechanism and release ratio of them in asphalt mixtures were expounded.In a nutshell,this review aims at highlighting the current research achievements on alginate capsules and fibers containing rejuvenator in asphalt materials,and inspiring enhanced self-healing methods for smart and sustainable maintenance of asphalt pavement.

How to Make Capsules Containing Rejuvenators for Their Use in Asphalt Concrete

Rejuvenators are products designed to restore original properties to oxidized asphalt binders by restoring the original ratio of asphaltenes to maltenes. But,for a rejuvenator to be successful,it must penetrate the pavement surface. Besides,application of a rejuvenator will also reduce the skid resistance of the pavement. To solve this,these rejuvenators can be encapsulated and mixed in asphalt concrete. Once the stress in the capsules reaches a certain threshold,the particles break and the rejuvenator is released,giving back the original properties of the pavement. The objective of this paper is to show how these capsules behave and define the most appropriate testing methods to find their effect on asphalt concrete. For this,two different types of rejuvenators will be encapsulated and their effect on the properties of the capsules investigated. Besides,the release mechanisms of the capsules will be unravelled.

Influence of rejuvenators on bitumen ageing in hot recycled asphalt mixtures

The use of reclaimed asphalt pavement （RAP） in new hot mix asphalt （HMA） by means of hot recycling techniques generates the advantage linked to the exploitation of both lytic and bituminous component, consequently leading to the decrease of both virgin aggregates and bitumen supplying. However, many agencies and public administration authorise RAP percentages ranges from 10% to 30% in hot recycling. The main reason for such a low amount of allowable RAP content is related to the aged bitumen contained in the RAP materials, which is more brittle than a virgin bitumen leading to a final mixture more susceptible to fatigue, thermal and reflection cracking. The use of rejuvenators has the potential to restore rheology and chemical components of aged RAP bitumen, thus allowing a significant increase in the amount of RAP to be properly implemented in HMA. The experimental investigation is described in this paper and carried out through a dynamic shear rheometer （DSR） which provides the rheological characterisation of a paving grade bitumen during its overall service life including its reuse in hot recycling by adopting different rejuvenators. Results show that rejuvenators modify bitumen chemistry and consequently rheology by enhancing the viscous response. Moreover, it was observed that oxidation is less harmful, in terms of stiffness increase, on the 50/50 aged bitumen - virgin bitumen blends （rejuvenated or not） than on the virgin bitumen. Moreover, the addition of a rejuvenator in a bituminous blend containing 50% of bitumen reactivated from RAP could lead to a corresponding composite bituminous phase less subjected to ageing phenomena and even less stiff at the end of service life than the associated virgin bitumen alone.

Efficacy of intraovarian autologous platelet-rich plasma administration in women with low ovarian reserve: A systematic review and meta-analysis

Objective:To conduct a systematic examination and meta-analysis of the most reliable data from experimental studies evaluating the efficacy of autologous platelet-rich plasma(PRP)on low ovarian reserve.Methods:A comprehensive search was performed utilizing pertinent search terms across electronic databases,including PubMed,Cochrane,and Google Scholar.We included studies that assigned infertile women with low ovarian reserve in experimental studies.Ovarian reserve parameters were measured before and after PRP injection into ovaries.The data of each study was retrieved and subsequently compiled.Results:Of 301 articles collected and reviewed,six studies were finally included in the meta-analysis.Following PRP injection,infertile women showed a non-significant increase in anti-Mullerian hormone(AMH)level(MD=0.10;95%CI-0.04,0.23),a significant increase in antral follicular count(AFC)(MD=1.88;95%CI 0.47,3.29),and a non-significant reduction in follicle-stimulating hormone(FSH)level(MD=-0.22;95%CI-8.32,7.87).Conclusions:Autologous PRP may increase AFC,but not AMH.Although it is found beneficial in enhancing ovarian reserve(AFC),further research with strong evidence is still required.

Fat management in upper blepharoplasty:Addition or subtraction blepharoplasties,how and when

BACKGROUND As one of the most common aesthetic surgical procedures carried out today,blepharoplasty should be in the repertoire of every plastic surgeon.The term blepharoplasty encompasses a wide range of techniques and options that must be tailored to the specific defect and patient one has to treat.A sound knowledge of the upper and lower eyelids’anatomy is essential for proper surgical execution.Trends have shifted towards more conservative methods(especially of the fat compartment)and sometimes in combination with augmentation techniques,helping to reach a rejuvenated appearance.AIM To present an overview of the surgical techniques considered for upper lid blepharoplasty and fat pad management,in addition to information on how a surgeon may approach the best treatment for his patient based on current publications in literature.METHODS We searched the literature published between 2013,to 2023 using Medline and Reference Citation Analysis.The database was searched using the keywords“upper blepharoplasty”AND“fat”.Papers without full text/abstracts and reviews were excluded.The search strategy followed the PRISMA.The American Society of Plastic Surgeons guidelines for Therapeutic Studies checklist was used to assess all articles.Two authors individually reviewed each article and rated them for importance and relevance to the topic.A consensus was sought and the most relevant studies.RESULTS After the application of the selection criteria used in our review,13 publications were found to address upper lid blepharoplasty specifically.Three of these studies were reviews and three were retrospective studies.Five publications were comparative studies and a further two were clinical trials.CONCLUSION The tendency of modern surgery is to be conservative,by removing adipose tissue only if strictly necessary and restoring the volume of the upper eyelid in a concept of beauty that espouses a"full"sight.There is no gold standard technique to achieve younger and enhanced eyelids.Long-term prospective comparative studies are fundamental in understanding which path is the best to follow.

Microspace Revitalization Design around Xihuangcun Railway Station from the Perspective of Urban Renewal

Railways within the city carry the historical memory of urban development and are important industrial heritage resources.However,with urban development and changes in transportation functions,railways lose their original application value and are gradually left unused or even abandoned,affecting the vitality of the region.Taking the space around Xihuangcun Railway Station as the research object,the public activity space on both sides of the railway is reshaped through five strategies:function revitalization,traffic revitalization,heritage revitalization,spatial revitalization,and landscape revitalization,and the grey area of the city is transformed into a vibrant development zone of the city.

Microscopic experimental and numerical research on rejuvenators: A review

Prompting high content of reclaimed asphalt pavement(RAP) to be used in road building and maintenance has drawn great attention. The application of rejuvenators is an efficient way to ensure the performance of recycled asphalt mixtures. However, as various types of rejuvenators emerging, limited understanding about rejuvenation poses challenges to put effective ones into use. For precisely evaluating the performance of rejuvenators, plenty of studies were conducted to ascertain the fundamental mechanism of rejuvenating from the microscopic view. This paper provides an overview of studies focusing on the change inside asphalt after adding rejuvenators. Chemical compositions of rejuvenators were collected as basic information. Both laboratorial experiments and molecular dynamic simulations were investigated to not only compare the effectiveness of several rejuvenators but also explain the rejuvenating mechanism. Finally, functional groups of rejuvenator structures were comprehensively examined to provide global understanding about how chemical compositions influence the efficacy of rejuvenators. This review highlights that the essential capacity of a true rejuvenator is to disturb asphaltene agglomerations. Besides, the molecular structures of rejuvenators will not only affect their deagglomerating abilities but also the performances of diffusion and durability. It has been found that gel-permeation chromatography(GPC) analysis is effective in evaluating the performance of rejuvenators, while Fourier transform infrared spectroscopy(FT-IR) and SARA(saturates, aromatics, resins and asphaltenes) analysis are only suitable for assessing asphalt oxidization. In addition, comparing some tests can only detect changes, molecular dynamic simulation can reveal the mechanism both of data and vision. The results of this work can provide comprehensive knowledge for the evaluation and development of rejuvenators.

The compartmented alginate fibres optimisation for bitumen rejuvenator encapsulation

This article presents development of a novel self-healing technology for asphalt pave- ments, where asphalt binder rejuvenator is encapsulated within the compartmented alginate fibres. The key objective of the study was to optimise the compartmented alginate fibre design, i.e., maximising amount of rejuvenator encapsulated within the fibre. The results demonstrate that optimum rejuvenator content in the alginate fibre is of 70：B0 rejuvenator/alginate ratio. The fibres are of sufficient thermal and mechanical strength to survive harsh asphalt mixing and compaction processes. Furthermore, results illustrate that zeer open asfalt beton （ZOAB） asphalt mix containing 5% of 70：30 rejuvenator/alginate ratio compartmented alginate fibres has higher strength, stiffness and better healing properties in comparison to the control asphalt mix, i.e., mix without fibres, and mix containing fibres with lower rejuvenator content. These results show that compartmented alginate fibres encapsulating bitumen rejuvenator present a promising new approach for the development of self-healing asphalt pavement systems.

Evaluation of total protein,peroxidase,and nutrients measured by pXRF for the determination of tissue rejuvenation/reinvigoration of Eucalyptus microcorys

Ontogenetic aging of tissues and the gradual decrease of adventitious rooting are known challenges for the clonal propagation of woody species,hampering clonal forestry programs.This study examined possible signatures of tissue rejuvenation/reinvigoration in different propagated materials of Eucalyptus microcorys by analyzing the total protein profile,peroxidase activity,macro-and micronutrient contents,and adventitious rooting of mini cuttings.The analyses were performed on E.microcorys shoots which were successfully obtained by seminal and grafting propagation,micropropagation with epicormic shoots,and indirect organogenesis.Among four mature trees used in the propagation,tissues from the one with the best propagation results were investigated for signs of tissue rejuvenation and/or reinvigoration.Five individuals from each technique were randomly selected and transferred to a semi-hydroponic"channel"system.After four weeks in the seedbed,the total protein,peroxidase activity,nutrient content and rooting of the mini cuttings were evaluated.SDS-PAGE enabled the differentiation of leaf samples obtained by grafting from the other propagation techniques,as revealed by two distinct bands.Materials obtained by micropropagation with epicormic shoots showed the highest peroxidase activity,while those obtained by seminal propagation and from the selected mature tree showed the lowest peroxidase activity.A portable X-ray fluorescence spectroscope(pXRF)identified adequate nutrient content in most of the nutrients tested in materials obtained by seminal and grafting propagation,and by indirect organogenesis.The analysis of adventitious rooting showed that the highest rooting percentage was observed in mini cuttings from seminal propagation(75%)followed by indirect organogenesis(35%).Based on principal component analysis,it was concluded that rooting of mini cuttings from both seminal propagation and indirect organogenesis was associated with phosphorous,sulphur,and potassium contents,which suggests a higher level of tissue rejuvenation/reinvigoration in these propagated plants.Further studies are recommended to search for other methods that present similarities with the responses to adventitious rooting in forest species and thus optimize the rescue and propagation of plants with distinct ontogenetic stages.

Promoting Climate Change Havens in the United States and Globally for Migrating Populations

Appalachia has been identified as the largest Climate Change Haven in the continental United States and could serve as a refuge for millions of persons. This research presents a marketing plan for promoting migration to the Appalachian Region using advertising and a website that communicates the desirable qualities of the area. Communications will first be directed toward the current residents of Appalachia (the Internal Market) in order to create enthusiasm for welcoming new arrivals. Then, promotional messages will be sent to prospective migrants seeking to escape the negative effects of climate change in the Southeast and Southwest of the United States and globally (the External Market). The approach used here may be applicable to Climate Change Havens across the globe.

Hyaluronic acid injection in the auricular base for the aesthetic correction of lying ears:A retrospective study

Background Ears play an important role in facial profiles.Lying ears are not perceived favorably in Asian cultures;therefore,surgical procedures are implemented to adjust this defect.However,surgery has complications and requires recovery time.We introduced a hyaluronic acid(HA)injection technique to aesthetically improve ear prominence.Methods This retrospective study examined 25 Chinese patients aged 20-47 years with congenital lying ears who received HA injections in the auricular base at Shanghai Ninth People’s Hospital and Hangzhou Yijie Medical Cosmetology Clinic between November 2019 and December 2022.The average injection volume was 6.32​±​1.22 mL in the auricular base unilaterally,and the follow-up time ranged from 6 to 24 months.Morphological measurement data were recorded.Two-dimensional(2D)and three-dimensional(3D)images were obtained to evaluate the effects.Results All patients showed improvements in ear prominence.The cranioauricular angle(CAA)increased from 22.24°​±​4.53°to 65.90°​±​5.38°immediately post-injection and was maintained at 49.18°​±​4.74°6 months later.The ear projection(EP)increased from 14.75​±​2.72 mm to 26.26​±​2.94 mm immediately post-injection and was 22.51​±​2.68 mm after 6 months.No serious complications were noted.Conclusion HA injection in the auricular base effectively corrected the lying ears and aesthetically optimized the facial profile.It also had a face-lift effect that made the face look younger and more compact.The injection procedure was minimally invasive and required no recovery period.The effect was maintained for a long time and was satisfactory.

A Non-Invasive Skin Treatment Combining LED with Pharmacologic and Ultrasonic Technologies for Facial Rejuvenation

Background: Non-invasive facial treatments have the ability to rejuvenate the facial profile when specific pharmacologic agents and modalities are prescribed and used in combination taking into consideration each patient’s unique skin type and condition. RATIONALE Epinova is a non-invasive skin treatment that combines the correct concentrations and combinations of topicals and modalities to elicit facial rejuvenation with no down-time or side effects. Purpose: This paper focuses on facial rejuvenation improvements combining the RATIONALE Essential Six skincare system (RATIONALE, Victoria, Australia) to protect and repair the skin with the RATIONALE Epinova facial treatment every 4-6 weeks—which uses non-invasive technologies and professional strength active ingredients to deliver visible changes to skin tone and texture. Methods: Subjects underwent a RATIONALE consultation, including taking a skin history and skin imaging, followed by a data analysis and diagnosis of skin condition and prescription of a customized RATIONALE treatement (Epinova), including appropriate pharmacologic agents and treatment with personalized photo/sono therapeutic devices. Results: Subjects reported increased skin hydration, tactile improvements, skin firmness and visible radiance following the RATIONALE Epinova treatment. Further investigations will be initiated to explore the potential for longer term improvements, including connenctive tissue deposition, reduction of erythema etc. Treatments should be performed every 4-6 weeks for patients under 40 and every 3-4 weeks for patients over 40, to support cell differentiation, migration and desquamation to achieve non-invasive facial rejuvenation. Conclusion: This study demonstrated that the synergy of pharmacologic, LED light therapy and ultrasonic technologies when prescribed and administered by a trained skin therapist, can lead to a visible improvement in the signs of facial ageing and photodamage, restoring the appearance of healthy, radiant skin. .

The Combined Effect of Botulinum Toxin Type A with a Biorevitalizing Treatment on Forehead Rejuvenation: A Case Series

Background: The forehead is particularly prone to repetitive facial expressions and hyperdynamic activity, resulting in deep wrinkles and a loss of elasticity and hydration. Although botulinum toxin type A (BoNTA) has been shown to reduce the appearance of wrinkles and allow patients to have a smoother and hence younger upper face, it cannot help to improve the other aspects that determine overall skin quality. Objective: This case series aims to evaluate the clinical efficacy of combining BoNTA injections with a biorevitalizing treatment (NCTF®135HA) on skin aging signs and quality using a split face approach. Patients and Methods: A total of eight patients from 30 to 55 years old were treated with botulinum toxin type A combined with NCTF®-135HA or alone. Results: At D60, clinical skin quality scoring showed that NCTF®135HA injection significantly reduced wrinkles and enhanced skin homogeneity, hydration, firmness, and radiance. The Global Aesthetic Improvement Scale (GAIS) by the evaluator at D60 reported mean scores of 2375 (much improved) on the side of the face treated with BoNTA + NCTF®-135HA compared to the side of the face without NCTF®135HA. According to patients, the NCTF®135HA injections resulted in a significantly better aesthetic improvement score on D60 (mean score of 2.5 compared to 0.125 without NCTF®135HA, p 0.001). Conclusions: Our findings show that combining a biorevitalizing treatment with a BoNTA injection can significantly improve the skin’s overall appearance and decrease the wrinkle score when compared to the BoNTA injections alone. The results suggest that the combinatory strategy is effective, safe, and associated with a high level of patient satisfaction.

基于检查点和Rejuvenation的软件可靠性建模分析

处于运行阶段的软件往往存在老化现象,即性能的逐渐下降或失效。为了避免软件老化造成的影响,人们提出了软件rejuvenation技术。这是一种预防性的软件容错策略,能有效的提高软件系统的可靠性和可用性。但由于rejuvenation操作过程的复杂性,它的成本也是不可忽略的。相对于rejuvenation来说,检查点是一种轻量级的软件容错策略,其成本远小于rejuvenation的成本。本文旨在结合rejuvenation和检查点技术,在rejuvenation周期间插入适当数目的检查点,以降低系统的宕机成本。文中给出了系统的petri网模型,并结合实例进行了分析。

基于Rejuvenation的程序执行时间优化算法

Rejuvenation是为了防止软件老化而提出的一种主动性、预防性的软件容错策略.把定时Rejuvenation策略引入到执行时间有限的单任务程序中,分析了存在老化时,软件Rejuvenation对程序总执行时间所起的影响.仿真结果表明,定时的Rejuvenation策略能有效地避免软件老化带来的突发性失效,从而减少程序的执行时间.

基于检查点和Rejuvenation的软件运行模型分析

近来的研究表明 ,长时间运行的通信软件往往存在老化现象。为防止软件老化引起的突发性系统停机 ,提高系统的可靠性 ,人们提出了一种预防性的软件容错策略 ,称为rejuvenation。由于它的过程复杂 ,总的停机成本仍然是可观的。检查点是一种轻量级的软件容错策略 ,其成本远小于rejuvenation的成本。该文通过合理结合rejuvenation和检查点技术 ,实现了降低总的系统停机成本的目的。文中给出了系统的Petri网模型 ,并结合实例进行了分析。