Urban heat island (UHI) manifests as the temperature rise in built-up urban areas relative to surrounding rural countryside, largely because of relatively greater proportion incident solar energy that is absorbed and stored by man-made materials. The direct impact UHI can be significant on both daytime night-time temperatures, indirect impacts include increased air conditioning loads, deteriorated water quality, reduced pavement lifetimes, exacerbated waves. Modifying thermal properties...

A one-dimensional mathematical model was developed, based on the fundamental energy balance, to calculate pavement near-surface temperatures using hourly measured solar radiation, air temperature, dew-point and wind velocity data. An analysis conducted predict diurnal temperature effects of thermophysical properties with aim seeking an optimum composition paving materials for future infrastructure projects. Appropriate not only ensure stability safety road users, but also ability mitigate...

Increased nighttime temperatures caused by retained heat in urban areas is a phenomenon known as the island (UHI) effect. Urbanization requires an increase pavement surface area, which contributes to UHI result of unfavorable retention properties. In recent years, alternative designs have become more common attempt mitigate environmental impacts urbanization. Specifically, porous pavements are gaining popularity paving industry because their attractive storm water mitigation and friction...

Abstract The objective of this study was to evaluate the material properties a conventional (control) and fiber-reinforced asphalt mixtures using advanced characterization tests. laboratory experimental program included triaxial shear strength, dynamic (complex) modulus, repeated load permanent deformation, fatigue, crack propagation, indirect tensile strength data used compare performance fiber-modified mixture control. results showed that fibers improved mixture’s in several unique ways...

Reclaimed asphalt pavement (RAP) and recycled shingles (RAS) contain significant amounts of bitumen their application in new constructions have been promoted as a sustainable practice the industry to promote circular economy. However, this effort has faced challenges such aged bitumen's inferior properties compared virgin counterpart its unknown contribution pavements. To address latter issue, liquid additives were used under general title rejuvenators. That poses an additional challenge...

The objective of this research study was to evaluate several mathematical models be used in calculating the onset tertiary flow [referred as number (FN) parameter] for asphalt mixtures. FN indicates shear deformation mixtures, which is a significant parameter evaluating rutting field. obtained from repeated load permanent (RLPD) laboratory test. Current modeling techniques determining use polynomial model fitting approach, works well most conventional However, analysis and observations on...

The global phenomenon of rapid urbanization is forcing the transition native vegetation to man-made engineered surfaces resulting in urban heat island (UHI) effect. UHI can adversely impact sustainability regions by increasing dependence mechanical cooling which results increased greenhouse gas emissions, consumption water thermoelectric process and costs living for regional residents. also increase incidence severity related illnesses as well alter sensitive ecological systems. Mesoscale...

This research presents a laboratory investigation into the effects of polyolefin and aramid fibers as reinforcement material in hot-mix asphalt (HMA) mixtures, with different binders. Three commercially available binders were used: cement penetration grade AC60/70, natural rubber–modified (NRMA), polymer-modified (PMA). The effect fiber those mixtures was evaluated by detailed experimental program, which included Marshall stability, indirect tensile strength (ITS), resilient modulus (MR),...

Crumb rubber is a material produced by shredding and commutating used tires. There no doubt that the increasing piles of tires create environmental concerns. The long-term goal this research to find means dispose crumb placement in portland cement concrete still provide final product with good engineering properties. Arizona Department Transportation State University have initiated several (CRC) test sections throughout over past few years. Laboratory tests were conducted support knowledge...

Sustainability at airports has received attention recently as owners have worked to incorporate sustainable practices into projects and daily operations. Several guides been published by airport agencies document practices. One potential practice involves alternative paving materials for airfield pavements. Specifically, fiber-reinforced asphalt concrete shown promising results used resurface Runway 1–19 the Jackson Hole Airport in Jackson, Wyoming. This paper explores feasibility of using a...

Crumb rubber is a material produced by shredding and commutating used tires. There no doubt that the increasing piles of tires create environmental concerns. The long-term goal this research to find means dispose crumb placement in portland cement concrete still provide final product with good engineering properties. Arizona Department Transportation State University have initiated several (CRC) test sections throughout over past few years. Laboratory tests were conducted support knowledge...

Abstract A recent study at Arizona State University has shown that the phase angle, φ, was a good laboratory parameter to distinguish asphalt mixture's tyre/pavement noise characteristics in field. The angle is obtained simultaneously from E* dynamic complex modulus test (AASHTO TP 62-03). In particular, peak or maximum range of frequencies provided best indication noise-dampening response. objective this utilise φ–E* relationships develop appropriate master curves for parameter. addition,...