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City of Ramsey <br />Project B1705491 <br />April 4, 2018 <br />Page 10 <br />D.1.c. Design Sections <br />Laboratory tests to determine an R-value for pavement design were not included in the scope of this <br />project. Given the most common soils in the top 5 feet of pavement sections, which include poorly <br />graded sand with silt and poorly graded sand, we recommend using an R-value of 50 for pavement <br />thickness design. Note that some shallow clayey soils, such as in Boring ST-C11, may need to be removed <br />to achieve this value and make the pavement section in Table 7 appropriate. <br />Table 7 shows our recommendations for materials for the pavement section. The thicknesses are typical <br />of those used by the City of Ramsey. <br />Table 7. City of Ramsey Bituminous Pavement Thickness Design <br />Thickness <br />Layer (inches) <br />Bituminous Wear 1 1/2 (1 lift) <br />Bituminous Non -wear 2 (1 lift) <br />Aggregate Base (Class 5 or 6) 4 <br />or Reclaim <br />*For small quantities, SPWEA240C can be used for the entire thickness. <br />MnDOT <br />Specification/Designation <br />SPW EA240C <br />SPNWB230C* <br />3138 <br />3135 <br />The above pavement design is based upon a 20-year performance life. This is the amount of time before <br />major reconstruction is anticipated. This performance life assumes maintenance such as seal coating and <br />crack sealing is routinely performed. The actual pavement life will vary depending on variations in <br />weather, traffic conditions and maintenance. <br />D.1.d. Materials and Compaction <br />We recommend specifying pavement materials as recommended in Table 6. <br />We recommend compacting the aggregate base or reclaim materials to meet the requirements of <br />MnDOT specification 2211.3.D.2.c. (Penetration Index Method). We recommend compacting bituminous <br />pavements to at least 92 percent of the maximum theoretical Rice density per the Maximum Density <br />Method (specification 2360.3.D.1), with bituminous materials and placement practices meeting the <br />requirements of MnDOT Specification 2360. <br />BRAUN <br />INTERTEC <br />