FHWA s Demonstration Project for Enhanced Durability Through Increased Density Courtesy Asphalt Institute TIM ASCHENBRENER, P.E. SENIOR ASPHALT PAVEMENT ENGINEER PAVEMENT MATERIALS TEAM OFFICE OF PRECONSTRUCTION, CONSTRUCTION AND PAVEMENTS FHWA Asphalt Mixture Expert Task Group Fall River, MA May 8, 2018
Enhanced Durability of Asphalt Pavements through Increased In-Place Pavement Density Workshops 28 States WA OR MT ND MN NH VT ME ID WY SD WI MI NY MA CA NV UT CO NE KS IA MO IL IN OH KY WV PA VA CT DE MD RI NJ DC AZ NM OK AR TN NC SC WFL MS AL GA CFL AK AK TX LA EFL FL HI PR
Enhanced Durability of Asphalt Pavements through Increased In-Place Pavement Density Demonstration Projects Phase 1 (10 states) WA OR MT ND MN NH VT ME ID WY SD WI MI NY MA CA NV UT CO NE KS IA MO IL IN OH KY PA WV VA CT DE MD RI NJ DC AZ NM OK AR TN NC SC WFL MS AL GA CFL TX LA EFL AK FL HI Mobile Asphalt Testing Trailer (2) PR
Enhanced Durability of Asphalt Pavements through Increased In-Place Pavement Density Demonstration Projects Phase 1 (10 states) Phase 2 (9 states) WA OR MT ND MN NH VT ME ID WY SD WI MI NY MA CA NV UT CO NE KS IA MO IL IN OH KY PA WV VA CT DE MD RI NJ DC AZ NM OK AR TN NC SC WFL MS AL GA CFL TX LA EFL AK FL HI Mobile Asphalt Testing Trailer (3) PR
Enhanced Durability of Asphalt Pavements through Increased In-Place Pavement Density CA OR WA NV ID UT AZ MT WY NM CO ND SD NE KS OK MN IA MO AR WI IL Demonstration Projects IN MI TN KY OH WV SC Phase 1 (10 states) Phase 2 (9 states) Phase 3 (10 states) PA VA NC NY NH VT ME CT DE MD WFL MA RI NJ DC MS AL GA CFL TX LA EFL AK FL HI Mobile Asphalt Testing Trailer (3) PR
Demonstration Project Status 6 Phase Year States Constructed State Reports Summary Report 1 2016 10 10 10 July 2017 2 2017-2018 9 5 (2 re-do s) 3 2018 10 0 0 2
Some Gold Medal Density (% G mm ) Specifications Purpose Identify density (% G mm ) specifications that are success stories. Since this is an Olympic year, these success stories are considered gold medal examples. 7 Image Pixabay
Some Gold Medal Density (% G mm ) Specifications Alaska Department of Transportation & Public Facilities Maine DOT Maryland DOT State Highway Administration Michigan DOT New York State DOT Pennsylvania DOT Tennessee DOT 8 Note: There are likely more. Contact me if you think you have one.
Enhanced Durability of Asphalt Pavements Through Increased In-Place Pavement Density 9
Gold Medal Density (% G mm ) Specifications Project Information 10 Year(s) of Data Analyzed Mix Type Type of Projects Acceptance Testing State D AK ME MD MI NY PA TN 2016 2015 Type C N/A Agency only Type II 19mm & Superpave 12.5 mm Interstate and principal arterial Agency only 2013 to 2017 9.5, 12.5 and 19 mm All mainline projects Agency only 2017 2015 2017 2017 Dense Graded Contractor validated by agency 9.5, 12.5 and 19 mm All projects> 5,000 tons Agency only Series 50 9.5, 12.5 and 19 mm Full or partially controlled roadways Agency only High level wearing surface 9.5, 12.5 & 19mm Agency only 2015 to 2017 D-mix (3/8 NMAS) Interstate and SR Freeways Agency only
Maine DOT Statewide Results 2013 to 2017 11 1400 Number of Records 1200 1000 800 600 400 200 0 5.8% below 92% Avg.=94.5% 1163 1130 894 571 517 194 151 59 0 8 12 11 87.5 88.5 89.5 90.5 91.5 92.5 93.5 94.5 95.5 96.5 97.5 98.5 Density (% G mm )
State D Statewide Results from 2016 12 25.3% below 92% 22 19 16 6 0 0 88.5 89.0 89.5 90.0 90.5 91.0 57 52 45 29 91.5 92.0 92.5 93.0 Density (% G mm ) 44 93.5 Avg.=92.6% 31 22 9 9 2 94.0 94.5 95.0 95.5 96.0 60 50 40 30 20 10 0 Number of Records
State D Statewide Results from 2016 13 41.0% below 92.4% 22 19 16 6 0 0 88.5 89.0 89.5 90.0 90.5 91.0 57 52 45 29 91.5 92.0 92.5 93.0 Density (% G mm ) 44 93.5 Avg.=92.6% 31 22 9 9 2 94.0 94.5 95.0 95.5 96.0 60 50 40 30 20 10 0 Number of Records
Gold Medal Density (% G mm ) Specifications Specification/Criteria/Results 14 State D AK ME MD MI NY PA TN Type of Specification PWL PWL PWL PWL PWL Limits (% G mm ) 93.0 to 100.0 92.5 to 97.5 92.5 to 100.0 97.0 98.0 Incentive for Only Density Max. Incent. (% G mm ) 5.0% 2.5% 2.0% 5.0% 2.0% 96.0 93.5 94.5 94.0 94.0 Avg. (% G mm ) 94.9 94.5 94.4 94.2 94.4 Std. Dev. of Lots 1.76 1.20 1.03 1.01 1.46 < 92% G mm 5.6% 5.8% 5.5% 5.0% 3.1%
Gold Medal Density (% G mm ) Specifications Specification/Criteria/Results 15 State D AK ME MD MI NY PA TN Type of Specification PWL PWL PWL PWL PWL Lot Avg. Limits (% G mm ) 93.0 to 100.0 92.5 to 97.5 92.5 to 100.0 97.0 98.0 97.0 Incentive for Only Density Max. Incent. (% G mm ) 5.0% 2.5% 2.0% 5.0% 2.0% 2.0% 96.0 93.5 94.5 94.0 94.0 94.0 Avg. (% G mm ) 94.9 94.5 94.4 94.2 94.4 93.9 Std. Dev. of Lots 1.76 1.20 1.03 1.01 1.46 N/A < 92% G mm 5.6% 5.8% 5.5% 5.0% 3.1% 11.0%
Gold Medal Density (% G mm ) Specifications Specification/Criteria/Results 16 State D AK ME MD MI NY PA TN Type of Specification PWL PWL Lot Avg. & Ind. Sublot PWL PWL PWL Lot Avg. Limits (% G mm ) 93.0 to 100.0 92.5 to 97.5 97.0 92.5 to 100.0 97.0 98.0 97.0 Incentive for Only Density Max. Incent. (% G mm ) 5.0% 2.5% 5.0% 2.0% 5.0% 2.0% 2.0% 96.0 93.5 94.0 94.5 94.0 94.0 94.0 Avg. (% G mm ) 94.9 94.5 94.0 94.4 94.2 94.4 93.9 Std. Dev. of Lots 1.76 1.20 1.03 1.03 1.01 1.46 N/A < 92% G mm 5.6% 5.8% 5.3% 5.5% 5.0% 3.1% 11.0%
Gold Medal Density (% G mm ) Specifications Specification/Criteria/Results 17 State D AK ME MD MI NY PA TN Type of Specification Lot Avg. PWL PWL Lot Avg. & Ind. Sublot PWL PWL PWL Lot Avg. Limits (% G mm ) 91.5 to 95.0 93.0 to 100.0 92.5 to 97.5 97.0 92.5 to 100.0 97.0 98.0 97.0 Incentive for Only Density Max. Incent. (% G mm ) 1.5% 5.0% 2.5% 5.0% 2.0% 5.0% 2.0% 2.0% 92.75 96.0 93.5 94.0 94.5 94.0 94.0 94.0 Avg. (% G mm ) 92.6 94.9 94.5 94.0 94.4 94.2 94.4 93.9 Std. Dev. of Lots N/A 1.76 1.20 1.03 1.03 1.01 1.46 N/A < 92% G mm 25.3% 5.6% 5.8% 5.3% 5.5% 5.0% 3.1% 11.0%
Gold Medal Density (% G mm ) Specifications Testing and Frequency 18 State D AK ME MD MI NY PA TN Lot Size (tons) 2,000 5,000 4,500 Day s production 5,000 1,000 2,500 1,000 Sublots per Lot Frequency (tons) 8 10 6 5 min. 5 4 5 5 250 500 750 500 max. 1000 250 500 200 Measuring G mb 6-in. cores 1 per sublot 6-in. cores 1 per sublot 6-in. cores 1 per sublot 4 or 6-in. cores 2 per sublot 6-in. cores 1 per sublot 6-in cores 1 per sublot 6-in cores 1 per sublot 4 or 6-in. cores 1 per sublot Measuring G mm Avg. of 5 tests: every 500 tons Individual test: 1 per lot Individual test: 1 per sublot Individual test: Daily value Individual test: 1 per sublot Ind. test: 1 per lot Individual test: Daily value Daily Avg.: 2 tests per day
Thank you QUESTIONS / COMMENTS: TIM ASCHENBRENER, P.E. FHWA SENIOR ASPHALT PAVEMENT ENGINEER PAVEMENT MATERIALS TEAM OFFICE OF PRECONSTRUCTION, CONSTRUCTION AND PAVEMENTS LAKEWOOD, COLORADO Image Pixabay (720) 963-3247 TIMOTHY.ASCHENBRENER@DOT.GOV