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Publications related to Asphalt (10,000)
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This new volume examines the mathematical models and experimental methods for advanced engineering materials and structures. It also helps to determine practical applications under a wide range of conditions, helping to set up what is needed to produce a new generation of new materials. The diversity of such mathematical models and experimental met...
Article
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Having kilometers of asphalt road, yet with this heat going to waste, an attempt has been made in this research to extract the road's renewable energy heat. The purpose of the experiment is to compare the energy and exergy efficiency of various materials of asphalt solar water heaters (ASWH), as well as heat transmission through the water tube and...
Article
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Management of waste glass is a huge environmental challenge in Nigeria and most developing countries. This study evaluates the influence of using Waste Glass Fines (WGF) as an asphalt filler to improve the Rigidity Ratio (RR) of asphaltic concrete. As stand-alone fillers in hot asphalt mixtures, the performances of quarry dust and waste glass p...
Article
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The cohesive and adhesive performances of bituminous materials significantly affect the service life of asphalt pavement. The molecular dynamics (MD) simulation method has been proved as an effective tool to predict the thermodynamics parameters of different multi-substance and multi-phase bitumen models during different diffusion, self-healing, an...
Article
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Traditional asphalt pavement is one of the causes of urban heat island due to its low albedo. Although the use of various pavement materials is widely preferred method to mitigate urban heat island effect, the use of color pigment added roller compacted high performance concrete as road pavement is a new approach. Within the scope of this research...
Article
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The focus of this study is to critically review the physiochemical and engineering properties of the fly ash and its applications in various fields. The utilization of fly ash has become a widespread area, but the amount of utilization is still a serious issue. It has many beneficial qualities (such as pozzolanic property, fineness, spherical shape...
Article
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With increased demand of asphalt pavement and limited binder and aggregate supply, the reutilisation of Recycled Asphalt Pavement (RAP) has gained more attention in pavement engineering from the environmental, sustainable, and economic views. Given this background, this study aims to classify and reutilise the recycled asphalt binder collected from...
Article
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Electronic skins (e-skins) are devices that can respond to mechanical stimuli and enable robots to perceive their surroundings. A great challenge for existing e-skins is that they may easily fail under extreme mechanical conditions due to their multilayered architecture with mechanical mismatch and weak adhesion between the interlayers. Here we rep...
Article
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In the recent past, emphasis was given roller-compacted concrete in the field of pavement construction owing to its proven advantages like fast construction method, high density, and economical when compared with conventional concrete. Roller compacted cement concrete is the name given to stiff concrete that can be compacted by a roller which is ge...
Article
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Compatibility between asphalt and polyurethane (PU) additives is the most challenging issue affecting the performance of PU modified asphalt. This study aims to investigate the influence of shearing temperature and PU content on compatibility between PU and asphalt via experiments and molecular dynamics (MD) simulation. Herein, the molecular models...
Article
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In this research, the performance of hot mix asphalts mixes (HMA) with RAP and RCA was evaluated, in terms of their Marshall stability, flow, and volumetric properties, to verify their applicability as a replacement for the natural aggregate in the flexible pavement surface layers of HMA mixtures. The experimental work was divided into two phases;...
Article
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Steel slag (SS) has good microwave absorption and microwave heating potential. Firstly, SS was classified by the difference of microwave capacity, and high heat source (HHS) steel slag was selected to partially replace limestone to prepare steel slag asphalt mixture (SSAM) in this work. The morphology and elements of SS were analyzed by microcosmic...
Article
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The simulation of field aging using laboratory techniques is an essential prerequisite in the design of high-quality asphalt mixtures. Previous studies in this area have indicated the potential to use an accelerated method for aging loose mixtures using highly oxidative gases, namely ozone and other reactive oxygen species (ROS). Based on that, the...
Article
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It is known that pollutants and their irreparable influence can considerably jeopardize the environment and human health. Such disastrous, growing, hazardous particles urged researchers to find effective ways and diminish their destructive impacts and preserve our planet. This study evaluates the potential of incorporating Titanium Dioxide (TiO2) s...
Article
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Polymer modification of asphalt binders has progressively become more common over recent decades. Styrene-Butadiene-Styrene (SBS) is a well-recognized elastomer that has been commonly used in asphalt pavements. SBS polymer specifically exhibits a chemical morphology of hard polystyrene segment tethered by soft polybutadiene segment. Concerns relate...
Article
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This study investigates the ageing of neat and crumb rubber modified bitumen (CRMB) under various conditions. Bitumen was modified with a high content of crumb rubber (CR) (22.5% by weight of base bitumen) and subjected to the equivalent amount of UV radiation occurring in one year in Melbourne, Australia. Long-term ageing via pressure ageing vesse...
Article
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Properties of aggregates are majorly influenced by parameters of source rocks viz., formation process, chemical composition, impurities, volume of pores, and grain size. The study presents a review of aggregate treatment methods and its efficacy to enhance the quality of aggregate. Various aspects of aggregate treatment methods like processing temp...
Article
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Cracking of asphalt pavement is mostly caused by the mixed fracture of asphalt concrete. Determining a simple, repeatable, and accurate method is necessary for evaluating the fracture resistance of asphalt concrete. To explore the mixed fracture performance of asphalt concrete and determine the feasibility of different semicircular bend methods, th...
Article
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First, porous asphalt (PA) pavement possesses a lower strength and lifetime compared to typical dense-grade asphalt mixtures due to its large empty space structure. Second, PA pavements' fatigue life and durability are affected significantly by climate factors; the two most critical factors being aging conditions and moisture actions. Third, becaus...
Article
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The recycling potential of water treatment plant (WTP) sludge in asphalt concrete mixes as filler material was assessed in this study. Marshall properties of hot bituminous mix specimens, having varying proportions (0-10%) of WTP sludge as mineral filler, were investigated, and optimum bitumen content (OBC) was obtained for each filler proportion....
Article
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Waste tire textile fibers (WTTF), as a by-product (10–15% by weight of tires) of end-of-life tires (ELT) mechanical recycling (grinding), are classified as hazardous wastes and traditionally burnt (thermal recycling) or buried (landfilling), leading to several environmental and ecological issues. Thus, WTTF still represent an important challenge in...
Article
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The present study proposes a novel fatigue life prediction considering the temperature load, which may be neglected in the traditional assessment of suspension bridge steel deck welds under dynamic vehicle load. Vehicle fatigue, pavement temperature, and temperature gradient models are developed based on the test data from the weight-in-motion syst...
Conference Paper
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Increasing amounts of marine debris including plastic bottles and glass cullet waste are negatively impacting coastal ecosystems. Applying asphalt concrete can reduce marine debris. Aggregate materials in the asphalt concrete job mix formula were combined with plastic flakes (P) and glass cullet (G) of sub-size less than 0.30 mm and retained on a #...
Article
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Epoxy asphalt concrete (EAC) has excellent properties such as high strength, outstanding thermal stability, and great fatigue resistance, and is considered to be a long-life pavement material. Meanwhile, the low initial viscosity of the epoxy components provides the possibility to reduce the mixing temperature of SBS-modified asphalt. The purpose o...
Article
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Pavement temperature is the main factor determining road icing, and accurate and timely pavement temperature prediction is of significant importance to regional traffic safety management and preventive maintenance. The prediction of pavement temperature at the micro-scale has been a challenge to be tackled. To solve this problem, a bidirectional ex...
Article
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Efforts are being made to reduce energy consumption worldwide, and road construction is no ex-ception. This goal can be achieved, among other things, by producing warm mix asphalt (WMA). The binder of the latter may be foamed bitumen. The mixing and laying temperatures can then be selected to be lower by 20-40oC than those of the conventional aspha...
Article
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Vehicle tailgating or simply tailgating is a hazardous driving habit. Tailgating occurs when a vehicle moves very close behind another one while not leaving adequate separation distance in case the vehicle in front stops unexpectedly; this separation distance is technically called “Assured Clear Distance Ahead” (ACDA) or Safe Driving Distance. Adva...
Article
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The three-stage behavior is the most significant feature of permanent deformation of asphalt mixture under repeated loading, and the transition points, which refer to the dividing points of different stages, are commonly used as vital parameters to evaluate the rutting resistance. This study aims to propose a novel calculation method for transition...
Article
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This research effort is geared towards revealing the latent potential of discarded shoe polish that might be repurposed as an asphalt fluxing agent for the construction of durable and sustainable road surfaces. To drive this creative invention, the effect of various proportions of waste shoe polish (e.g., 5, 10, and 15 wt. % WSP) on the performance...
Article
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Asphalt mixture is a typical viscoelastic material, and its road performance will change with the action of environment and load during actual service. This study conducted experimental research on the surface course asphalt mixture of three categories and six typical structures of RIOHTrack based on the Dynamic Mechanical Analysis method. Moreover...
Article
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Autonomous vehicles (AVs) are becoming increasingly popular, and this can potentially affect road performance. Road performance also influences driving comfort and safety for AVs. In this study, the influence of changes in traffic volume and wheel track distribution caused by AVs on the rutting distress of asphalt pavement was investigated through...
Article
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The high bitumen content in stone mastic asphalt (SMA), typically between 6 and 7%, has reduced the demand for road paving and the need to use new material to partially replace the binder content is of great significance. However, the utilization of waste polyethylene terephthalate (PET) as a partial replacement of bitumen in SMA has shown good res...
Article
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This research aims to determine if the observed improvements using polyethylene (PE) waste in asphalt binder translate into better performance at the asphalt mixture scale in the laboratory environment while overcoming the stability and homogeneity issues experienced at the binder level. This is accomplished through a round-robin multinational expe...
Article
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In this work, an aged asphalt was mixed with a new modified asphalt based on styrene–butadiene–styrene (SBS) in different proportions, and the warm mixing agent was added to simulate the asphalt fusion behaviour in the warm mixed recycled asphalt with different aged asphalt fertilizer (reclaimed asphalt pavement, RAP) content. Low field nuclear mag...
Article
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This article carries out laboratory tests, driving tests, and discrete element method simulations to study the mechanical properties of ballasted tracks including asphalt graded gravel and the influence of factors such as the thickness of asphalt graded gravel layer and train speed on the dynamic characteristics of the closed structure of asphalt g...
Article
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The road infrastructure is a major concern in the civilization of human being. Roads, bridges and tunnel link people together from the past to the present days. The pavement technology evolved through the centuries. The materials varied with time: from an earthy surface, to stones or cubes, from concrete slabs to hot mix polymer modified drainage a...
Conference Paper
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With a rise in the traffic volume of heavy vehicles (40 feet tall) in combination with the establishment of the new road system, there is a need for improving asphalt pavement quality and thereby achieving longer service life. However, when improving the pavement structure, there are concerns about an increase in construction costs and traffic cong...
Conference Paper
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The study investigated a high-durability asphalt mixture that has the same excellent rutting resistance and oil corrosion resistance as semi-flexible pavement, and that can be open to traffic quickly after construction. The present study developed a waste PET resin to conduct the high-durability asphalt mixture. The laboratory experiments showed th...
Article
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To study the electrical performance of high-speed railway ballasted work and the long running and rotating characteristics of the bed, different design methods are adopted. The longitudinal and transverse resistance of the bed increases with the increase in the ballast grading width. When ballast particle gradation is the lowest interpolation betwe...
Article
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Large area sampling approaches have been developed and implemented by the US Environmental Protection Agency (EPA) to increase sample sizes, and potentially representativeness, in outdoor urban environments (e.g., concrete, asphalt, grass/landscaping). These sampling approaches could be implemented in response to an outdoor biological contamination...
Article
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This article presents recent findings on the effect of thermal variances on pavements. It covers temperature measurement in asphalt pavement; the history of asphalt pavement temperature prediction models, determination of asphalt layer depth temperature; main factors contributing to temperature variations in the asphaltic pavement; energy balance i...
Article
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Polyurethane (PU) can be used as a road material binder, and its mechanical properties, durability, temperature stability, and other road performance metrics are good. However, the interlayer bonding between PU mixtures and asphalt mixtures is poor. The influence of the pavement structure, interlayer treatment scheme, load, and environmental factor...
Article
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This study investigates the effects of two waste materials from construction and industry, namely recycled concrete aggregate (RCA) and Type C fly ash, on the overall performance of a special type of pavement surface mixture, porous asphalt mixture. Mixtures of different combinations of RCA (for partial aggregate replacement) and fly ash (for fille...
Article
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Coal fly ash (CFA) is a coal ignition buildup at thermal power plants, which has been viewed as a hazardous waste globally. The major problems with CFA are the large volume of land needed for its disposal and poisonous weighty metal sifted to groundwater. CFA has been considered a waste and water pollutant until recently; however, CFA is a helpful...
Article
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As the Framework Act on Sustainable Infrastructure Management has recently been enacted in Korea, it has become mandatory to establish a medium-and long-term plan for managing social infrastructure and evaluating the feasibility of maintenance projects. However, road agencies are experiencing problems due to a lack of deterioration models which are...
Article
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The current study presents the evaluation of the mechanical behavior of an asphalt mixture using the alternative aggregate boiler coke ash, an element that originates in nickel processing. Hereby, we have focused the research on the runways for military purposes, which marks a great difference to the existing commercial runways in the Western Brazi...
Article
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The distribution of contact stress of particles in asphalt mixture could be used to reflect the relationship between the macroscopic mechanical properties and the mesostructure of the material. However, there is no mature method to obtain the internal stress characteristics of asphalt mixture. In this study, the accurate stress distribution and str...
Conference Paper
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Pavement performance data are a critical component of pavement management systems, and are affected many factors as the pavement structure, climate, traffic, and material properties. The current traditional "parametric" techniques still adopted by state agencies can hardly predict performance distress indices reliably and with high accuracy. Hence,...
Preprint
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Asphalt pavements must be able to resist large temperature stresses including frost in winter and high temperatures in summer, and this will be further increased in the future due to climate change. In conjunction with the mechanical stresses caused by traffic, this may lead to an accelerated development of rutting and fatigue cracking. One possibl...
Article
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It is known that increasing the durability and crack resistance, that is, the reliability of asphalt pavements is an urgent issue for most roads of high categories and airfields. At modern rates of increase of traffic volume and growth of dynamic loadings from vehicles and aircraft, the requirements for the strength of asphalt pavements, shear, cra...
Article
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Until recently, the most common way for recovering of damaged and worn asphalt pavements on Ukrainian roads remains the provision of additional reinforced layers over the old pavement with patching. However, such measures give only a short-term effect because after one or two years, the existing deformations and fractures beneath reinforced layers...
Article
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The environmental and service conditions exposed to asphalt pavements affect their rheological and performance properties, making them brittle material susceptible to cracking. One way to partially re-establish the mechanical properties of the cracked pavements is through binder runoff through the cracks in a capillary healing process. It is possib...
Conference Paper
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Pakistan is leading towards a major motorway system. Infrastructure growth especially highways and most of the roads are flexible pavements which have higher susceptibility to Rutting. To overcome this issue we have to find ways to solve these problems. Keeping in view the current economic conditions, one must find material which is cost effective...
Conference Paper
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The concept of having layers in flexible pavement is to sustain and distribute the heavy traffic load of the vehicles to the subsequent layers. Due to insufficient compaction of the asphalt concrete, the surface layers (wearing and base) continue to densify under loads resulting in the rutting densification. Rutting in the pavement considerably red...
Presentation
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Coal is transformed from bitumen by geological processes. The coal gangue in the coal bed is the sand blown into the asphalt lake, and the fossil is the animal bones that fall into the asphalt lake. Today, there is a large lake of asphalt in North America, which contains many ancient animal bones. Asphalt lakes are formed when oil flows to the surf...
Article
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Salt storage asphalt pavement has been considered as a functional pavement that could effectively and actively melt snow on the road. Based on the previous studies, the macro melting snow and ice mechanism on the salt storage road is studied, high performance salt storage materials have been developed, as well as to analyze pavement and anti-freezi...
Article
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To address the inadequate performance of rejuvenated asphalt when waste engine oil bottom (WEOB) is used as an asphalt rejuvenator, liquid styrene-butadiene rubber (liquid SBR) was used to enhance the performance of WEOB-rejuvenated asphalt. By testing the basic physical properties of asphalt and using the high- and low-temperature rheology, differ...
Chapter
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Road pavement failure is a common phenomenon in the developing countries especially in Nigeria, where its construction is not done by strictly following international standard and design consideration in terms of materials selection. It has been observed that flexible pavements, which are the commonest pavements in Nigeria, fail few weeks and in so...