Articles

Articles

• New Advancements in Rubberized Asphalt Using an Elastomeric Asphalt Extender – Three Case Studies

  A new frontier in rubberized asphalt technology has been achieved with the new innovative product called Reacted and Activated Rubber (RAR). As introduced in AR2012 international conference and in the 2013 TRB annual meeting, RAR is composed of neat soft bitumen, fine grinded crumb tire rubber, and a siliceous Activated Mineral Binder Stabilizer (AMBS), at optimized proportions. RAR is...

  more

• Development of new asphalt mixture ThinGap 9.5 mm with Reacted and Activated Rubber

  The objective of this study was to develop a mix, named herein ThinGap 9.5 mm, with reacted and activated rubber (RAR), with identical or superior performance attributes of a normal asphalt rubber gap graded mix to resist surface torsional forces but that could be used in very thin lifts just like an Open Graded Asphalt rubber mix. It was...

  more

• Reacted and Activated Rubber -The new frontier in improved pavements

  The Issue: For about 50 years the paving industry has been trying to take advantage of the elastomeric material and of the carbon black and silica included in recycled tires. Those elastomeric materials are know to improve elastic recovery on bitumen. The carbon black and silica improve aggregate interlock. The Problem: A crumb rubber alone cannot be placed directly...

  more

• Extensor elastómero do betume – A nova fronteira das misturas betuminosas com ligantes betuminosos modificados com borracha

  A borracha reciclada de pneus reagida e activada (Reacted and Activated Rubber – RAR), enquanto ligante betuminoso modificado com borracha pode ser adicionada a qualquer tipo de mistura betuminosa, permitindo substituir parte do betume a utilizar. Este artigo sintetiza os resultados do estudo de I&D efectuado, no qual se demonstra que a RAR modifica o betume puro aumentando o seu grau PG,...

  more