Bhupendra Singh

Abstract: Managing the increasing traffic is a big problem all over the world. Intelligent Transportation System (ITS) provides solution to these problems with the help of new technologies. ITS is an integrated system that implements a broad range of communication, control, vehicle sensing and electronics technologies to solve and manage the traffic problems. ITS is being used in the developed countries since past two decades, but it is still a new concept when developing countries like India, Brazil, China, South Africa etc. are concerned. In the present study we have studied four major parts of the ITS i.e., Advanced Traveler Information System (ATIS), Advanced Traffic Management System (ATMS), Advanced Public Transportation System (APTS), and Emergency Management System (EMS). Objective of the paper is to study various ITS architecture and model and review such models to get in-depth of their architecture. Hence architecture and developed models over the years of four major branches of ITS have been reviewed here to make a comparison analysis of different models that have been developed by the researchers in their studies. It will lead to the gaps in the knowledge which can be further studied. The paper highlights the conclusions extracted from the studies of different systems and also gives the future scope in the field of ITS to make it more user friendly and accessible.

Abstract: Asphalt binder is a complex material to study. Asphalt binder modification and ageing further increase this complexity. These two phenomenon affect the behaviour and performance of the binder significantly. In order to successfully characterise and understand the behaviour of asphalt binder, it is necessary to study the effect of ageing and modification at microscopic level. Over the years many researchers have used different method to study the chemical and morphological behaviour of the asphalt binder. In the present study three major morphological and chemical experimental procedures Fluorescence microscopy, Scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR) are used to examine the effect of polymer modification and ageing on asphalt binder simultaneously. In the study base binder is modified using styrene butadiene styrene (SBS) and ethylene vinyl acetate (EVA). Fluorescence microscopy and separation testes were used to find out the optimum binder content for both the polymer modifiers. Short term and long term ageing were simulated on the base binder as well as PMBs by using rolling thin film oven test (RTFOT) and pressure ageing vessel (PAV) test respectively. SEM and FTIR tests were conducted before and after the ageing and modification. Test results were analysed. Based on the analysis of test results, comparisons are made and conclusions are given.

Abstract: This study evaluates the creep and recovery response of different asphalt binders in unaged and short-term aged conditions. The multiple stress creep and recovery (MSCR) test has been carri...

Abstract: Global warming is one of the biggest challenges that we are facing today. Construction industry is also contributing to the problem by emitting greenhouse gases. In order to deal with this issue sustainable products are being adopted by all the industries. Similarly, highway industry is also adopting several measures to reduce its carbon footprint. One of such measures is cold mix asphalt technology (CMA). CMA does not require any heating of material. This is achieved by using asphalt emulsion and cutback as binding material. Since these materials are liquid at room temperature, they do not require any heating for mixing and compaction. This gives many environmental and economic benefits to CMA over hot mix asphalt (HMA). Despite having these advantages, inferior performance makes CMA undesirable to be used in the construction of roads having high density traffic. Although some studies have been taken to improve the performance of CMA but those are limited in their scope. Present paper gives an overview of the different aspects of CMA technology. It discusses materials, design procedure, field utilisation, performance, effect of different performance enhancing measures of CMA. In the end benefits, drawbacks and future scope of CMA are also presented.

Abstract: The present study aims at studying ageing characteristics of conventional bitumen, polymer modified bitumen (PMB) and warm mix asphalt (WMA) by using FTIR. Results of obtained FTIR spectrum were qu...

Abstract: This paper explores the role of Internet of Things (IoT) and its impact on supply chain management (SCM) through an extensive literature review. Important aspects of IoT in SCM are covered including IoT definition, main IoT technology enablers and various SCM processes and applications. We offer several categorisation of the extant literature, such as based on methodology, industry sector and focus on a classification based on major supply chain processes. In addition, a bibliometric analysis of the literature is also presented. We find that most studies have focused on conceptualising the impact of IoT with limited analytical models and empirical studies. In addition, most studies have focused on the delivery supply chain process and the food and manufacturing supply chains. Areas of future SCM research that can support IoT implementation are also identified.

Abstract: Abstract The traditional supply chains faces several challenges such as uncertainty, cost, complexity and vulnerable problems. To overcome these problems the supply chains must be more smarter. For establishing a large-scale of smart infrastructure to merge data, information, products, physical objects and all processes of supply chain, we applies the internet of things (IOT) in supply chain management (SCM) through building a smart and secure system of SCM. We have prepared a website for suppliers and managers. We tracked the flow of products at each stage in supply chain management through the Radio Frequency Identification (RFID) technology. Each product attached with RFID tag and scanned through RFID reader and ESP8266 at each phase of supply chain management. After scanning the tag we stores tag id in the database. All information about products will be entered by suppliers and then uploaded to managers. In our system the supplier and manager gets perfect information of the entire life cycle of goods, and this will achieve transparency of supply chain management. For assessing security criteria of proposed system of supply chain management, we also proposed a framework which integrates neutrosophic Decision Making Trial and Evaluation Laboratory (N-DEMATEL) technique with analytic hierarchy process (AHP). The neutrosophic Decision Making Trial and Evaluation Laboratory (N-DEMATEL) technique is utilized to infer cause and effect interrelationships among criteria of smart supply chain security requirements. Depending on obtained information from (N-DEMATEL) the neutrosophic AHP is utilized to calculate weight of criteria and sub-criteria. Then the integrated framework will help researchers and practitioners to design secure system of supply chains. We presented DEMATEL and AHP in neutrosophic environment to deal effectively with vague, uncertain and incomplete information. So the proposed system of supply chain management will be able to overcome all challenges of traditional SCM and provide secure environment of SCM processes.

Abstract: Current practice of recycled waste plastics includes 7 major types: polyethylene terephthalate (PETE), high-density polyethylene (HDPE), polyvinyl chloride (PVC), low-density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), and others such as acrylonitrile butadiene styrene (ABS), ethylene vinyl acetate (EVA), polycarbonate (PC), and polyurethane (PU). This paper provides a comprehensive and in-depth literature review on the feasibility and the state-of-art repurposing waste plastics into cleaner asphalt pavement materials. Optimum dosage of waste plastics should be identified based on appropriate engineering performance parameters such as viscosity of asphalt, and rutting, fatigue cracking, thermal cracking, and moisture resistance of asphalt mixtures. If the appropriate amount of plastic is not determined, adverse impacts on the performance of the pavement could occur. Plastic wastes are incorporated into asphalt mixes by the dry (aggregate substitute) or wet (binder modifier, extender, or substitute) methods. In general, the incorporation of plastic wastes into asphalt mixes showed improvements in performance parameters such as stiffness, and rutting and fatigue resistance. However, HDPE, PVC, LDPE, PP, and PS yielded conflicting performance measures. Overall, the capability of recycling waste plastics into asphalt mixes would minimize landfilling, reduce dependence on nonrenewable resources, and diversify asphalt pavement building options. Additional research is needed to fully understand the effects of various plastics on the performance of the pavement, and potential environmental and economic impacts this process could implicate. Another area where further study is needed are methods to improve the compatibilization between plastic and asphalt.

Abstract: Polymer additives are used to improve the properties of road bitumens including their oxidative resistance. However, their usage as anti-oxidative materials remains relatively unclear. This study aims to investigate the changes in the morphology and the rheological response of polymer modified bitumens used in road pavement construction caused by ageing. An elastomer (radial styrene butadiene styrene, SBS) and a plastomer (ethyl vinyl acetate, EVA) polymer were mixed with one base bitumen at three polymer concentrations. The bitumens were RTFO and PAV aged. The morphology of the bitumens was captured by fluorescence microscopy while the rheological properties were measured by means of the multiple stress creep and recovery (MSCR) test. The results show that the morphology of the SBS modified bitumen degrades with ageing as a function of polymer concentration and dispersion, with higher dispersion being more resistant. The morphology of the EVA modified bitumen has a low ageing susceptibility irrespective of polymer concentration. The MSCR response of EVA modified bitumens does not differ from that found for unmodified bitumen, where the hardening produces a decrease in the non-recoverable compliance. In the case of SBS modified bitumen, the degradation of the polymer backbone affects the bitumen hardening as much as the polymer phase dispersed and networked in the bitumen phase. Furthermore, in the case of the elastomer, the average percent recovery is in agreement with the variation of the morphology with ageing. Therefore, the use of the average percent recovery as a valuable rheological index of the integrity of the polymer network can be advocated.