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<br /> SCE Santa Ana <br /> October 25,2019 <br />Project No. 3.31634 <br /> Page 14 <br /> <br /> <br />test the moisture vapor flux rate prior to attempting application of the flooring. <br />"Breathable" floor coverings should be considered if the vapor flux rates are high. A <br />slipsheet should be used if crack sensitive floor coverings are planned. <br /> <br />The use of reinforcement in slabs and foundations will generally reduce the potential <br />for drying and shrinkage cracking. However, some cracking may be expected as the <br />concrete cures. Concrete cracking and/or spalling is often aggravated by a high cement <br />ratio, high or low concrete temperature at the time of placement, small nominal <br />aggregate size, rapid moisture loss, or the addition of water during placement. The use <br />of low slump concrete (not exceeding 4-inches at the time of placement), a water- <br />cement ratio no greater than 0.45 by weight, and proper curing methods can reduce <br />the potential for shrinkage cracking. <br /> <br />16. PAVEMENT RECOMMENDATIONS <br /> <br />The pavement sections are provided based on an assumed R-value of 62. Pavement <br />sections were determined using the Caltrans method for design of flexible pavements. <br /> <br />Traffic Indices utilized in this method of design are based on estimated equivalent axle <br />loads over a period of 20 years. The pavement sections were designed for assumed traffic <br />loading conditions. These recommendations must be confirmed with R-value testing of <br />representative near-surface soils at the completion of grading and after underground <br />utilities have been installed and backfilled. <br /> <br /> TABLE IV‐ AC Pavement Section Thickness <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />The thicknesses shown are for minimum thicknesses. The Hot Mix Asphalt (HMA) <br />construction process should follow the “method” process as described in Section 39 of the <br />Caltrans Standard Specifications. HMA should be Type A using the Standard construction <br />process complying with Section 39, “Hot Mix Asphalt” of the Standard Specifications. <br />Assumed <br />Traffic Index <br />Asphaltic‐Concrete <br />(AC) Thickness <br />(inches) <br />Class II Aggregate Base (AB) <br />(R=78) Thickness (inches) <br />≤ 5 3 4 <br />7 4 6 <br />9 4 8 <br />59 of 100 <br />1327 S Grand Ave <br />12/12/2024