The Arizona Department of Transportation (ADOT) has used crumb rubber from ground tires since the late 1960's to primarily reduce reflective cracking. In 1988, ADOT started to use crumb rubber mixed with hot asphalt, commonly referred to as asphalt rubber (AR) as a binder in hot mix asphalt (HMA). Typically, these mixes are either open-graded or gap-graded and from half inch to one inch or one ...

Wax-based additives can be added to crumb rubber modified bitumen (CRMB) at different stages enhance the workability. This study aims optimize preparation procedure by investigating effects of on rheological properties CRMB containing wax-based and interaction mechanism. Rubber swelling tests under various conditions were conducted examine temperature process. Rheological thermal characterizati...

Abstract Designing mixtures of asphalt with a porous structure to gain good trainability decreases both the propagation and generation traffic noise. Porous (PA) use crushed stone, small proportion processing sand, admixtures, binders. Therefore, this study aims examine impact adding crumbed rubber into mix PA. However, optimum amount binder used in reference mixture without crumb (CR) 10, 15, ...

The primary goal of this study was to obtain the same performance from an asphalt mixture made using a Marshall impact hammer (MIH) as Superpave gyratory compactor (SGC). This due expense equipment compared with equipment. A wet process used blend CR PG 70-16 asphalt. crushed stone aggregate 19 mm nominal maximum size, and samples were prepared SGC MIH. results show that nine percent determined...

As a kind of environmentally friendly material, crumb rubber modified asphalt is widely used in highway engineering to accelerate the consumption end-life tires. The objective this study investigate high-temperature rheological properties composite (CRCM) asphalt. In study, same content and different additives were added prepare CRCM asphalt, including CRCM-SBS, CRCM- Sasobit/BRF, CRCM-RARX. vi...