RAP/RAS Workshop
Transcript of RAP/RAS Workshop
![Page 1: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/1.jpg)
RAP/RAS Workshop
By David Morton QC Manager
APAC-Texas, Inc.
![Page 2: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/2.jpg)
General Rules
• RAP & RAS increases mix stiffness • Most WMA additives decrease stiffness • Tear-Off shingles are stiffer than Man-
waste shingles • Using multiple recycled bins improves
consistency • Finer RAS material improves consistency
![Page 3: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/3.jpg)
RAS has gotten a Bad W-rap
![Page 4: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/4.jpg)
Coarse Ground RAS
• Tabs sticking up in the mat
• Less effective asphalt • Less blending • More segregation
issues • Raveling issues • Customer complaints
![Page 5: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/5.jpg)
Fine Ground RAS
• No Tabs • More effective AC • Better blending • Better for WMA • Better for SMA & PFC • Less segregation and
raveling issues • Customer happy
![Page 6: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/6.jpg)
![Page 7: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/7.jpg)
RAS Scalping Screen
![Page 8: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/8.jpg)
SMA with RAS
• IH 30 Downtown Dallas October 2011 • SMA-D with 5% RAS PG 76-22 • Test Strip outside east bound lane (2,400
tons) • TTI Hamburg: 4.71 mm @ 20,000 passes • Overlay Test: 403 cycles • Advera WMA @ 1.5# per mix ton
![Page 9: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/9.jpg)
IH 30 SMA 5% RAS Spring 2012
![Page 10: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/10.jpg)
IH 30 SMA 5% RAS Fall 2012
![Page 11: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/11.jpg)
Warm Mix & RAS
• Do you get good blending at WMA temperatures?
• Will it help compaction? • Will it affect the Hamburg test? • Will it help prevent raveling? • Will it help thermal segregation? • Will it improve winter paving?
![Page 12: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/12.jpg)
Warm Mix Additives
![Page 13: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/13.jpg)
WMA Additive Considerations
• Quality and field performance • Plant introduction issues • Anti-strip replacement • Performance testing (Hamburg, IDT, &
Overlay) • Required dosage • Cost
![Page 14: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/14.jpg)
Advera Treated RAS
![Page 15: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/15.jpg)
Advera Treated RAS
![Page 16: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/16.jpg)
![Page 17: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/17.jpg)
![Page 18: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/18.jpg)
![Page 19: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/19.jpg)
![Page 20: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/20.jpg)
![Page 21: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/21.jpg)
Projects
• IH 820 Ft. Worth (Type D RAP/RAS PG 64-22) (Advera WMA) Production temperature 260˚F
• US 287 Ft. Worth (Type D RAP/RAS PG 64-22) (Arrmaz LOF 6500 with Cecabase WMA) Production temperature 270˚F
• Commercial trials: Type D RAP/RAS PG 64-22 with Hydrogreen rejuvenator/WMA
![Page 22: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/22.jpg)
![Page 23: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/23.jpg)
Take Away
• Grind size (the finer, the better) • Time is critical (haul time/project wait time) • Use a WMA additive to help haul times,
compaction, and workability • Don’t overheat the mix • Do your homework
![Page 24: RAP/RAS Workshop](https://reader031.fdocuments.in/reader031/viewer/2022041609/6252fd6ba95c5535ba52dfbe/html5/thumbnails/24.jpg)
Questions