Agenda - Council - 10/09/2018 - Laserfiche WebLink

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City of Ramsey Project B1705491 August 11, 2017 Page 10 D.1.c. Design Sections Laboratory tests to ie an R-value for pavement design were not included in the scope of this project. Given the most common soils in the top 5 feet of pavement sections, which include poorly graded sand with silt and poorly graded sand, we recommend using an R-value of 50 for pavement thickness design on all three projects. Based upon the assumed traffic loads and an R-value of 50, we recommend a new pavement section for the 2018-2019 Street Reconstruction Projects meet the minimum thicknesses presented in Table 7. Table 7. Recommended Bituminous Pavement Thickness Design (Areas A, B and C) Layer Bituminous Wear Bituminous Non -wear Aggregate Base (Class 5 or 6) or Reclaim Thickness (in.) 1 1/2 (1 lift) 2 (1 lift) 6 *For small quantities, SPWEA240C can be used for the entire thickness. Mn DOT Specification/Designation S PW EA240C SPNWB230C* 3138 3135 The above pavement design is based upon a 20-year performance life. This is the amount of time before major reconstruction is anticipated. This performance life assumes maintenance such as seal coating and crack sealing is routinely performed. The actual pavement life will vary depending on variations in weather, traffic conditions and maintenance. D.1.d. Materials and Compaction We recommend specifying pavement materials as recommended in Table 6. We recommend compacting the aggregate base or reclaim materials to meet the requirements of MnDOT specification 2211.3.D.2.c. (Penetration Index Method). We recommend compacting bituminous pavements to at least 92 percent of the maximum theoretical Rice density per the Maximum Density Method (specification 2360.3.D.1), with bituminous materials and placement practices meeting the requirements of MnDOT Specification 2360. BRAUN !NICER' t