Cement Stabilization of Reclaimed Asphalt Pavement Materials

Many road agencies are experiencing severe aggregate pit depletion and are faced with considering more cost effective alternatives to reduce reliance on virgin granular materials. Increased environmental awareness in combination with a surplus of stockpiled reclaimed asphalt pavement (RAP) materials in many urban centres has led to determining alternative uses for recycled asphaltic concrete materials. This study investigated how cement stabilization would affect both conventional and mechanistic material properties of crushed RAP materials and crushed asphaltic concrete (AC) millings. Overall, both the untreated crushed RAP and the untreated crushed AC millings showed improved California bearing ratio strength and triaxial frequency sweep behaviour in comparison to the conventional City of Saskatoon granular base course. The mechanical properties of the recycled asphaltic materials further improved with cement stabilization. The crushed AC millings had superior mechanical properties in comparison to the crushed RAP material. This study showed that cement stabilization improved the behaviour of recycled asphaltic concrete rubble materials. In addition, the recycled asphaltic materials characterized in this study demonstrated significant residual viscoelastic behaviour, which should improve climatic durability and mechanistic-climatic material behaviour. As a result, cement stabilization of reclaimed and recycled asphaltic concrete materials showed significant improvement in mechanical behaviour, illustrating the potential use of these materials as engineered granular base course.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References;
  • Pagination: 12p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01155559
  • Record Type: Publication
  • Report/Paper Numbers: 10-1803
  • Files: BTRIS, TRIS, TRB
  • Created Date: Jan 25 2010 10:49AM