Laserfiche WebLink
R-value testing after the completion of rough grading to verify the R-value of the as-graded <br />parking subgrade. <br />Asphaltic Concrete <br />Presented below are the recommended thicknesses for new flexible pavement structures <br />consisting of asphaltic concrete over a granular base. An alternate pavement section has been <br />provided for use in parking stall areas due to the anticipated lower traffic intensity in these <br />areas. However, truck traffic must be excluded from areas where the thinner pavement section <br />is used; otherwise premature pavement distress may occur. The pavement designs are based <br />on the traffic indices (TI's) indicated. The client and/or civil engineer should verify that these <br />TI's are representative of the anticipated traffic volumes. <br />ASPHALT PAVEMENTS (R = 30) <br />Thickness (inches) <br />Materials <br />Auto Parking Auto Drive Lanes Light Truck Traffic <br />(TI = 4.0)(TI = 5.0)(TI = 6.0) <br />Asphalt Concrete 3 3 31/2 <br />Aggregate Base 3 6 8 <br />Compacted Subgrade 12 12 12 <br />The aggregate base course should be compacted to at least 95 percent of the ASTM D-1557 <br />maximum dry density. The asphaltic concrete should be compacted to at least 95 percent of the <br />Marshall maximum density, as determined by ASTM D-2726. The aggregate base course may <br />consist of crushed aggregate base (CAB) or crushed miscellaneous base (CMB), which is a <br />recycled gravel, asphalt and concrete material. The gradation, R-Value, Sand Equivalent, and <br />Percentage Wear of the CAB or CMB should comply with appropriate specifications contained in <br />the current edition of the "Greenbook" Standard Specifications for Public Works Construction. <br />Portland Cement Concrete <br />The preparation of the subgrade soils within Portland cement concrete pavement areas should <br />be performed as previously described for proposed asphalt pavement areas. The minimum <br />recommended thicknesses for the Portland Cement Concrete pavement sections are as follows: <br />PORTLAND CEMENT CONCRETE PAVEMENTS <br />Thickness (inches) <br />Materials Automobile Parking and Drive Truck Traffic Areas <br />Areas (TI =6.0) <br />PCC 5 5 V2 <br />Compacted Subgrade <br />(95% minimum compaction) <br />12 12 <br />SoCalGeo <br />4 SOUTHERN G&M Convenience Store #72 - Santa Ana, CA <br />CALIFORNIA Project No. 16G123-1R <br />GEOTECHNICAL Page 28