MnROAD/NCAT Partnership Safer, Smarter, Sustainable Pavements through Innovative Research Jerry Geib March 28, 2018

National Pavement Preservation Study TPF-5(375) National Pavement Preservation Study 3 years at $50k/year Partnership is NOW a new pooled fund. Auburn Univ (NCAT is a non profit arm of Auburn) is a subcontractor to MnDOT

Outline MN weather MnDOT site Ride Data

4% coldest population 4M Minnesotans 2.9M other Americans 8.8M Canadians 87M Russians 108M Chinese

Low Temperature Cracking Development of SuperPave Original MnROAD Test Sections (PG 64-22, PG 58-28) 1999 MnROAD Test Cells (PG 58-28, PG 58-34 , PG 58-40) HMA examples for polymer binders. Pre Superpave, MnROAD thermal cracks were about every 25 feet. 500’ / 20 cracks = 25’ crack spacing.

Jan. 4, 2018 -44F in Embarras, MN Weather facts are not Boasting or complaining. Just our story. Our challenge, Design for loads, Design for the environment (northern half of the state) Colder than 96% of the world’s population. Statewide temps Jan. 4, 2018 -44F in Embarras, MN Superpave -34 binders work!! -34C = -29.2F Duluth this winter 74 days below ZERO. A nice run of 23 consecutive days below zero. XX days below zero in the winter of 2013-2014. The worst winter in the Twin Cities since 83-84. Note International Falls -41

Outline

MSU report for FHWA with LTPP data base Drainable bases had a significant positive impact on pavement performance in Wet Freeze zone. Sections in WF performed the worst vs other three climate regions. Fhwa-hrt-17-095

National Pavement Preservation Study Mille Lacs County Rum River Bridge RP 189.9 US-169 High Volume Road 4 mile section Pease CSAH 8 Low Volume Road 2.5 mile section MnROAD RP 185.3

Northern Low Traffic Preservation CSAH-8 High Traffic Preservation on US-169 Current experiment design of northern MnDOT sections 21 treatments on US 169 22 treatments on CSAH 8 13

National Pavement Preservation Study Goals National Study (Climatic zones) Provide consistently collected data / analysis Quantify the life extending benefits Improve and/or extend the pavement life Cost effectiveness LIFE EXTENDING BENEFITS THIS IS MY MOST IMPORTANT ASPECT OF THE STUDY THIS IS WHY THE HARD WORK

PreTreatment Condition US-169 Northbound Lanes Smoother than CSAH 8 Surface cracking

Cells 25, 26, and 27 were milled with a 7’ wide head. Cell 25, first 115’ was about 1”+ deep. Filled this area with type III micro surfacing, CQH-1hP

PreTreatment Condition CSAH-8 East and Westbound Lanes Very good tight HMA surface. Transverse cupped cracks.

EXPLAIN RIDE NUMBERS Single, double, triple. With fibers. With a rejuvenating emulsion. Under microsurfacing. Under Thinlay.

Nov 30, 2016 CHAS 8 cell 18

MICRO MILL AND THINLAY or CHIP SEAL or microsurface 16, 17, 18 were half lane wide micro mill head

Open Graded Friction Coarse“OGFC” OGFC/PCC conventional tack OGFC/PCC ultrafuse tack OGFC/HMA ultrafuse tack OGFC/HMA conventional tack August 2016 – Hardrives Contractor 24

New NEW LOGO

Thomas Harris McDonald Commissioner of Public Roads 1939 – 1953 “It was not our wealth that made our highways possible; rather it was our highways that made our wealth possible”, Thomas Harris McDonald Commissioner of Public Roads 1939 – 1953 October 24, 2013

Thank You Jerry Geib jerry.geib@state.mn.us

ADT I US MN total % >2,000 - 866 4,314 5,180 43.6 2-5,000 1,084 2,059 3,143 26.4 5-10k 162 600 784 1,546 13.0 10-50k 521 693 571 1,785 15.0 50-100k 135 1.1 >100k 96 0.8 CENTERLINE MILES 11,885. About 15% has <1,000 ADT

St. Louis CR 4 & 16 CR 4. 58-28, 30% RAP. Cracked every 50’ during the 1st winter. CR 16. 58-34, 20% RAP. No cracking during the 1st winter. Start of Projects.

69% of State Highways contain an average crack spacing < 50’ THIS PHOTO Airport. International Falls Year paved 1979,sealed,saw cuts added 1983 this picture is 1988 temp ? Crack spacing runway is about 1 mile long 150 ft wide original crack spacing was about 160 ft apart These saw cuts were put in to hopefully reduce movement at each crack but after about 5 years these saw cuts really opened up! Other fun info 20 inches full depth on clay subgrade

Survive the environment Minnesota’s Story (about 20 years ago) Design for the loads (and Hope to) Survive the environment (thermal cracking) Outline. Design for the loads. Design for the environment. Doing much better at both. Thermal cracking is the challenge. I will explain. Hope wasn’t working. Polymer is working.

Design for the environment Minnesota’s Story (today) Design for the loads Design for the environment Outline. Design for the loads. Design for the environment. Doing much better at both. Thermal cracking is the challenge.

MINNESOTA ALABAMA MN has I-35, I-90 and I-94 and the Twin Cities beltway. AL has I-59, I-65, I-85, I-10, I-20, I-22, and bypasses

MINNESOTA ALABAMA Total area 12th 30th 86,935 sq. mi. 52,420 Population 22nd 24th 5,519,952 4,863,300 Lane miles 5th !! 17th 285,180 213,068 The FUN facts are about pavements. I am a strong left brainer. I like to put things into context. If it wasn’t for all of the road construction, you could really get around in the summer. Square miles is land and water. 87 counties. Hennepin County ~ 1.2 million – Minneapolis. St Paul, our capitol is in Ramsey County 527, 000 19 counties with a population under 10,000. 38 counties under 20,000 (44%). 68 counties under 50,000 (78%). 4,055 Interstate line miles 14,339 roadway miles Most Miles TX, CA, IL,KS, MN

MINNESOTA ALABAMA DOT Lane miles 21th 19th 29,260 29,568 Interstate lane miles 4,030 4,558

Remember the 49th parallel. About 72% of Canadians live SOUTH of the 49 parallel. Half live south of 45 42’ A few miles north of St. Cloud, MN 10 miles N of the St. Cloud office. OK not all Canadians who live South of Minnesotan’s are warmer, but most are ….

Auburn dew points 70-74F Very Humid, quite uncomfortable 75-80F Extremely uncomfortable, fairly oppressive Over 80F Severely high, deadly for asthma Summer of 2015. ~ 70+ dew points from June 15 – Sept 11. MN 12 days total over 70+ Jan 2015 9 days below 0, Feb 12 days below 0