The objective of this study is to test the hypothesis that titanium dioxide (TiO2) can function as a photocatalytic compound when used in the preparation of warm-mix asphalt (WMA). The proposed asphalt mixture would combine the benefits of WMA such as reduced energy consumption and emission during production with the photocatalytic properties of TiO2 to trap and degrade organic and inorganic pa...

Ground-penetrating radar (GPR) has been used for asphalt concrete (AC) pavement density prediction the past two decades. Recently, it considered as a method quality control and assurance. A numerical to estimate specific gravity from its dielectric properties was developed validated. three-phase model considering aggregate, binder, air void components using an AC mixture generation algorithm. t...

i DISCLAIMER The contents of this report reflect the views of the authors who are solely responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views and policies of the National Center for Asphalt Technology of Auburn University. This report does not constitute a standard, specification, or regulation. ii ABSTRACT Stone mat...

In recent decades, economic development and population growth in the world has led to the expansion of road networks. Therefore the use of optimum methods for repairing and maintenance of these roads is considered as an important value. Today one of the options in this regard, is the use of asphalt recycling technology. The present study which took place in the summer of 2015 in Iran, Lorestan ...

The use of cold recycled asphalt mixtures (CRM) has been soaring during recent years. Reclaimed Asphalt Pavement (RAP) is the main component CRM, and despite numerous studies on impact different RAP types not deeply studied. This study compares volumetric several mechanical properties CRM prepared with from two sources various nominal maximum sizes (NMS). mix design was fixed, specimens were us...

Abstract Porous asphalt is a mixture of with low proportion fine aggregate to obtain high air void content, which would create water drainage path inside the pavement be channelled into system. Usually, materials used as filler are relatively expensive, such Portland cement and lime, hence, it necessary look for other cheaper alternative materials, organic waste. This study aims determine effec...

The high-resolution X-ray CT was applied to investigate the fatigue damage evolution of asphalt mixtures. detailed Xray images in centre samples were used characterise cracking and air voids increase at different vertical deformations. Air void content surface area distribution before after loading also analysed. results show that main failure mode mixtures low temperature is debonding interfac...

this study was focused on measuring air pollutants emission from factories producing the asphalt related products in delijan industrial estate, which is the main center of asphalt related products in iran. emissions of four factories were analyzed for air pollutants using a stack analyzer, testo 360, testo co., and germany. the average concentration of all measured stacks for pm, thc, co, nox, ...

This report evaluates the effectiveness of rubber-asphalt and ebonite-asphalt mixes based on a review of published literature and unpublished reports. It discusses in detail various aspects of these mixes, including: diffe ent applications, physical properties, experiences of state highway agencies, and claimed advantages and problems associated with their use. The addition of ground tire rubbe...