2016 NRRA Flexible Team Research Ideas

2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) #1 – IL Longitudinal joint construction performance #2 – FHRI (Summarize each states current activity and what the #1 – UMN 1 NRRA team suggests as future action plan - Sources of #2 – WI deterioration; construction innovations, pavement #1 - MN preservation approaches). #1 - MO Clyne (MN-1) High recycled asphalt mixtures (2) (Balance performance, economics, constructability, innovative uses of recycled materials. Build from work MI #2 – UMN done in Illinois, Wisconsin). #3 – FHR MAPA UofNH 2 APA-5 Recycling usage in Minnesota RAP/ RAS (24) Clyne (MN-4) #1 - MO MO-1 (Other states using increased percentages in shoulders. Innovations and alternate incorporation approaches). Design, construction, and performance of thin surfacing layer alternatives in cold climates (3) (Design, #5 – FHR construction, performance in terms of friction, noise, and #3 – UMN Combine 3,4,28? 3 LCC benefit of UTBWC, 4.75 mm, 9.5 mm, etc.) Clyne (MN-3) MAPA WI-1 Thinlay (MN suggested) (28) - 4.75 mix #1 - MN APA-3 Tie to PM team ideas?

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) Rehabilitation of asphalt roadways with HMA overlays Combine 3,4,28? (Surface prep, Texas underseals, performance tests. #1 – FHR #4 - MO MO-4 4 Include UTBWC. Evaluate 2361 HMA thin surface seal #1 - IL Clyne (MN-2) MO - Specially, spray paver with spray paver application to address past debonding vs distributor & paver issues).

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) Performance Test Summary (5) (Summarize current activities states are doing and the future. AFT, DCT, fatigue, E*, APA/HWTT, etc. can/will be used to predict pavement performance). Laboratory and field performance of sustainable asphalt mixtures (27) (With the need to utilize existing materials to support sustainability there are questions as to how #4 – FHR well a pavement system will perform when using #2 - MO UofNH #3 – IL higher percentages of RAP and RAS. Asphalt mixture See 27 MO-2 #1 – WI APA characteristics (AFT, flexibility test (FIT), DCT, fatigue, MO - Could be used in 5 #3 - MN APA-4 #4 – UMN E*, APA/HWTT, etc.) will be used to predict conjunction with an test #1 - WI pavement performance. Develop fatigue testing to #4 - MO MAPA section characterize the fatigue life of the mixture. Construct APA test section(s) at MnROAD to determine impact on Clyne (MN-5) performance of using high recycled materials on high traffic, cold weather pavement system. The study will determine which combination of mixture characteristics has on optimum performance life).

NCAT ties and this might be a part of any study that is required

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) Full-depth reclamation (Stabilized and unstabilized, sensitivity of performance to #2 – FHR in place materials characteristics, additive types, mix Clyne (MN-3) #1 – UMN #3- IL Tie to 6 discussion 6 design, add rock, etc. Optimal design balance between #5 – WI MAPA #5 - WI 7/14/16 FDR base and surfacing thicknesses). #3 - MO Clyne (MN-2) Geotechnical Team Also Combine 7, 24? Asphalt aging #3 – FHR (WI - Combine7 / 30) (Effective methods to delay, and mitigate, the effects #3- MN 7 #4 - UMN UofNH asphalt mix aging, benefits to LCC) #5 - MO MO-5 John Garrity – MN asked more about this area of needs #1 - IL

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) Rehabilitation of concrete roadways with HMA overlays (8) (surface prep before overlay construction with thin and thick overlays) Rehabilitation of concrete roadways with HMA overlays #1 – FHR (10) #2 - IL #5 – UMN (crack/seat or rubblization methods) MAPA MAPA 8 Rehab of PCC using thick HMA overlays (21) (Performance and LCC of highly modified or high #1 – APA strength mixtures, head to head with similar #4 - MN thickness of concrete overlay. Can the envelope be Clyne (MN-1) expanded with this rehab technique) Asphalt overlays over whitetopping or unbonded concrete overlays Best Practices for this type of rehabilitation (36) #2 – IL Tack coats #1 – FHR (Summarize each states current activity and what the #3 – WI 9 NRRA team suggests as future action plan - innovative #2 - MN MI alternatives, approach with higher RAP/RAS mixes, #2 - MO performance impacts). MAPA Clyne (MN-2) 10 Moved to 8

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) MAPA High strength asphalt layers / interlayers #3 MO (Technologies to producer higher strength HMA layers #4 - WI 11 including use of chemicals and fiber reinforcement, #3 - UMN MO-3 MN impact on design and performance). Both HMA and PCC MI (possible use of the old westbound PCC) #2 - APA Methods of enhancing compaction (proposed new title)

Identify asphalt mix additives that aid in compaction (12) #5 – IL (additives or construction technologies that can be used #2 - FHR #3 – FHR to achieve higher density in the field) #1 – UMN UofNH 12 #4 - WI SuperPave 5 Evaluation (33 - IL suggested) #5 – MN Clyne (MN-4) Design at 5% voids and construct at 5% voids – 50/60 #2 - WI gyratatios Clyne (MN-3) (Mihai – UofMN thoughts) Regressed air void design (32 - WI suggested) 3.0 air voids / asphalt addition Surface characteristics HMA 13 (further study based on results of Phase II). Field validation of cells built for different modes of cracking 14 #3 - UMN Clyne (MN-4) (evaluate mechanisms and performance relative to fatigue, thermal, reflective, and top-down cracking)

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) Cold mix asphalt / Cold in Place (15) (improvements to produce high quality HMA mixes) Cold Central Plant mix (33 - Mihai) #4 - FHR Construction and performance of pavement using WAPA Tie to 6 discussion 15 central plant mixed bituminous with foamed Clyne (MN-5) 7/14/16 asphalt (20) #2 - UMN (Eastern states are successfully constructing with (depends on #6) these mixes. Evaluate performance at high and low traffic levels, final surfacing alternatives) Warm mix asphalt (16) (research relative to chemical and foaming technologies, 16 tie to LTPP and NTPEP) #4 - UMN MAPA Performance of warm mix pavements designed and constructed with asphalt foam manifolds (26) Verification of pavement designs using limit strain 17 concept and high modulus layers. Porous HMA pavement rehabilitation options (18) (best practices for rehabilitation of porous pavements). Drop this idea 18 Porous HMA new pavements (19) Low Priority (follow-up to Phase II work, advances in technology, long-term performance) 19 Moved to 18 20 Moved to 15 21 Moved to 8 Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) Paving fabrics in HMA overlays 22 (Design, construction, and performance using Drop geosynthetics as part of an overlay project). Innovative production of asphalt mixtures (Are there opportunities to demonstrate and/or evaluate new technologies in this area? Recent advances have been made in asphalt chemistry, RAP 23 Drop processing and incorporation, and plant output, among other things. Emphasize the valuable renewable asset represented by our nations asphalt roadways). 24 Moved to 2 Implement improved 100% coverage QC/QA tools 25 Clyne (MN-1) to minimize construction defects. 26 Moved to 16 27 Moved to 5 28 Combined with 3 29 Rubber modified asphalt (WI suggestion) #5 - UMN Combine 29-30?

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section. 2016 NRRA Flexible Team Research Ideas Updated with member votes for the July 14th Meeting - Updates in RED Short Term Long Term “Analysis Idea” MnROAD # Asphalt Topics (Past) Tech Transfer Topic (less than a year – Research General Priority (now) crunch data from state Sections projects or MnROAD) (longer) Effects of REOB and other asphalt modifiers on mix performance (MN suggested) #3 – FHR UofNH Rejuvenators / other non-SBS related / Bio binders / #3 - WI (WI - Combine7 / 30) 30 Delta T critical temperatures #5 - UMN #4 - IL Combine 29-30? How does this effect the performance testing along with #2 - MN the use of rejuvenators/additives – additives and effects on aging Alternate (Could be evaluated with any PG Grading System vs MSCR (modification methods test section. Specially 31 X1-332 appendix) (MO suggested) #2 - UMN whether % Recovery in Appendix 332 focus Appendix X1 should be required with grading under MSCR.) 32 Moved to 12

33 Moved to 12 Rubblization (TT) MAPA 34 Mill and keep C/L elevation with AC overlay #4 - IL 35 Combine with 15

36 Moved to 8

Feedback on Pre July 14th voting  WI - suggestion would be to combine 7&30 since Tc is related to aging. One of the objectives (or co-objective) of a test section could be to evaluate the change of Tc over time.  WI - 14 didn’t make our list due questions of how the test section(s) would be built. If a good experimental plan can be developed, then I could see this being a top contender. Perhaps the goals of this topic could be combined with other objectives for a test section.