Subgrade design for new and reconstruction (Evaluate factors related to design, construction, and MN-2 performance related to depth of subcuts, quality of backfill #1 IL #3 - WI – #3 MidS material, for both pavement types. Consider existing MnDOT – #2 WI #3 - MO – 19/9/28 4/3/7 15 "frost-free" practices and alternate approaches. Review MnDOT #3 MidS #3 MidS – – Materials Engineers recommendations from recent past.) 9/3/12 6/3/9 (top 2 item) Life cycle of the gravel over time forensic – Different type of granular subbase layers under the top base materials (interest from group) Larger Subbase materials (3-6 inch) that is done under the top MN-1 #1 WI base under the surface bound paving layer – “finer” #2 IL #1 MO – – 0 19/0/19 9/0/9 10/0/10 16 MO shot rock base as larger and more permeable aggregate subbase material (top 2 item) (top 3 item) WI and IL are specs with the larger base types fabrics use – is the future research effort
15 Subgrade design for new and reconstruction (Evaluate factors related to design, construction, and performance related to depth of subcuts, quality of backfill material, for both pavement types. Consider existing MnDOT "frost-free" practices and alternate approaches. Review MnDOT Materials Engineers recommendations from recent past.) Life cycle of the gravel over time – forensic Different type of granular subbase layers under the top base materials (interest from group) MN-2 #3 – MidS 4/3/7 (top 2 item) #1 – IL #2 – WI #3 – MidS 9/3/12 #3 - WI #3 - MO #3 – MidS 6/3/9 19/9/28 16 Larger Subbase materials (3-6 inch) that is done under the top “finer” base under the surface bound paving layer MO shot rock base as larger and more permeable aggregate subbase material WI and IL are specs with the larger base types – fabrics use is the future research effort MN-1 #2 – IL 9/0/9 (top 2 item) 0 #1 – WI #1 – MO 10/0/10 (top 3 item) 19/0/19
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