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Murphy Parkway Warehouse <br />December 19, 2016 <br />Job No. 146-618 <br />Page 10 <br />Based upon these data, the standard Oates structural pavement section consisting of three inches of <br />asphalt concrete (AC) over three inches of aggregate base (AB) over 12 inches of chemically treated soil <br />is considered to have a traffic capacity equivalent to TI 7.0. A TI of 7.0 is considered capable of <br />supporting up to about 60 fully loaded, five-axle semi-trucks per week. Pavement sections designed for <br />TI 8.0 are considered capable of supporting up to about 190 fully loaded, five axle semi-trucks per week. <br />Our calculations indicate that pavement sections for TI 8.0 may consist of four inches of AC over three <br />inches of AB over 12 inches of chemically treated subgrade, or three and one-half inches of AC over <br />four inches of AB over 12 inches of chemically treated subgrade. These pavement sections, together <br />with alternative asphalt concrete pavement sections without chemically treated subgrades, are <br />summarized in Table 2. We can provide additional pavement section alternatives upon request. <br />TABLE 2 <br />ASPHALT CONCRETE PAVEMENT SECTION <br />ALTERNATIVES <br />Design <br />Traffic <br />Index/ <br />Use <br />Type B <br />Asphalt <br />Concrete <br />(inches) <br />Class 2 <br />Aggregate <br />Base <br />(inches) <br />Chemically <br />Treated <br />Soil <br />(inches) <br />4.5 <br />Auto Parking <br />2.5 <br />2.5 <br />4 <br />-- <br />-- <br />10 <br />7.0 <br />Up to 60 <br />Trucks per Week <br />3 <br />3 <br />8 <br />3 <br />-- <br />12 <br />8.0 <br />120 to 190 <br />Trucks per Week <br />3.5 <br />4 <br />3.5 <br />4 <br />9 <br />8 <br />4 <br />3 <br />-- <br />-- <br />12 <br />12 <br />Materials and construction within structural pavement sections should conform to the applicable <br />provisions of the 2010 Caltrans Standard Specifications <br />We recommend chemically treated subgrades be treated with portland cement to provide reactivity with <br />the expected sandy subgrade soils. The pavement areas should be treated after the subgrades have been <br />cut or filled to rough final grade and utility lines have been installed. The subgrade soils should be <br />treated with at least five percent portland cement, as measured by dry unit weight of the compacted soil. <br />The cement and soil should be brought to a uniform over-optimum moisture content, thoroughly mixed <br />and compacted to at least 92 percent of the maximum dry density determined by the ASTM D1557-02 <br />test procedure. Not more than three hours should elapse between the time the cement is mixed with the <br />soil/water and final compaction is completed. The above concentration of cement is based on <br />assumptions made regarding the soil composition of the pavement subgrades. The actual percentage and