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Bremer Financial Corporation <br />Project B2008939 <br />November 17, 2020 <br />Page 19 <br /> <br /> <br />Figure 3. Frost Protection Geometry Illustration <br /> <br /> <br /> <br />Another option is to limit frost heave in critical areas, such as doorways and entrances, via frost -depth <br />footings or localized excavations with sloped transitions between frost-susceptible and non-frost- <br />susceptible soils, as described above. <br /> <br />Over the life of slabs and pavements, cracks will develop, and joints will open up, which will expose the <br />subgrade and allow water to enter from the surface and either saturate or perch atop the subgrade soils. <br />This water intrusion increases the potential for frost heave or moisture-related distress near the crack or <br />joint. Therefore, we recommend implementing a detailed maintenance program to seal and/or fill any <br />cracks and joints. The maintenance program should give special attention to areas where dissimilar <br />materials abut one another, where construction joints occur and where shrinkage cracks develop. <br /> <br />C.7. Pavements <br /> <br />C.7.a. Design Sections <br />Our scope of services for this project did not include laboratory tests on subgrade soils to determine an <br />R-value for pavement design. Based on our experience with similar engineered fill and silty sand soils <br />anticipated at the pavement subgrade elevation, we recommend pavement design assume an R -value of <br />15. Note the contractor may need to perform limited removal of unsuitable or less suitable soils to <br />achieve this value. Table 8 provides recommended pavement sections, based on the soils support and <br />traffic loads. <br />