Transcription of Bituminous Cold-Mix Technology and Pavement Design
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Bituminous Cold-Mix Technology and Pavement Design
7 Bituminous Cold-Mix Technology and Pavement DesignTRB WORKSHOP 153 SOUTH AFRICAN HIGHWAY Technology AND PRACTICEDr Fritz JoosteDirectorModelling and Analysis SystemsTopics of this Presentation: Some history, project background Motivation of development approach (focus on structural Design ) Materials classification task details Structural capacity assessment details ConclusionSome Recycling with emulsion and foam was done from the early 1970 s Initially fairly primitive & often applied to less highly trafficked roads by experienced designersSome deep cold-in place recycling with Emulsionin 1994 Some with Foamfrom 1996 onwardsExisting Cold-Mix Guidelines Emulsion materials Sabita Manual 14 (1993) Sabita Manual 21 (1999) Foamed bitumen materials TG2 Interim Guideline (2002)Guidelines widely used, but need to Modernize & Improve Place foam and emulsion on equal footing Create a single, combined guideline Address need for paradigm shift in SABituminous Cold-Mix Guidelines Project initiated in 2005 to address deficiencies in existing guidelines Focus on mix designand structural designelements Limited time-frame: short term deliverable Somewhat novel structural Design approach adoptedFindings and methods will be incorporated into a larger, on-going Pavement Design development
7 Bituminous Cold-Mix Technology and Pavement Design TRB WORKSHOP 153 SOUTH AFRICAN HIGHWAY TECHNOLOGY AND PRACTICE Dr Fritz Jooste Director Modelling and Analysis Systems
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