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ST. BARBARA CATHOLIC SCHOOL TASK 2 75-24272-01 <br />DIOCESE OF ORANGE SEPTEMBER 12TH, 2024 <br />SANTA ANA, CA BID & PERMIT SET <br /> <br />ASPHALT PAVING 321216 - 7 <br />C. Prime Coat: Apply uniformly over surface of compacted-aggregate base at a rate of 0.15 to <br />0.50 gal./sq. yd. (0.7 to 2.3 L/sq. m). Apply enough material to penetrate and seal, but not <br />flood, surface. Allow prime coat to cure for 72 hours minimum. <br />1. If prime coat is not entirely absorbed within 24 hours after application, spread sand over <br />surface to blot excess asphalt. Use just enough sand to prevent pickup under traffic. <br />Remove loose sand by sweeping before pavement is placed and after volatiles have <br />evaporated. <br />2. Protect primed substrate from damage until ready to receive paving. <br /> <br />D. Prime Coat: Comply with section 302-5.3 of the Reference Specification. Apply primer at a <br />rate of between 0.20 and 0.25 gallons per square yard to top surface of base course prior to <br />asphalt placement. <br /> <br />E. Tack Coat: If a leveling course has been used for construction traffic, apply tack coat to all <br />leveling course surfaces in accordance with section 302-5.4 of the Reference Specification at a <br />rate of 0.10 gallons per square yard. <br /> <br /> <br />3.5 HOT-MIX ASPHALT PLACING <br /> <br />A. Machine place hot-mix asphalt mix on prepared surface, spread uniformly, and strike off. <br />Place asphalt mix by hand to areas inaccessible to equipment in a manner that prevents <br />segregation of mix. Place each course to required grade, cross section, and thickness, when <br />compacted. <br />1. Place hot-mix asphalt base course in number of lifts and thicknesses indicated. <br />2. Place hot-mix asphalt surface course in single lift. <br />3. Spread mix at minimum temperature of 250 deg F (121 deg C). <br />4. Begin applying mix along centerline of crown for crowned sections and on high side of <br />one-way slopes, unless otherwise indicated. <br />5. Regulate paver machine speed to obtain smooth, continuous surface free of pulls and <br />tears in asphalt-paving mat. <br /> <br />B. Place paving in consecutive strips not less than 10 feet (3 m) wide, except where infill edge <br />strips of a lesser width are required. <br />1. After first strip has been placed and rolled, place succeeding strips and extend rolling to <br />overlap previous strips. Complete asphalt base course for a section before placing <br />asphalt surface course. <br /> <br />C. Promptly correct surface irregularities in paving course behind paver. Use suitable hand tools <br />to remove excess material forming high spots. Fill depressions with hot-mix asphalt to <br />prevent segregation of mix; use suitable hand tools to smooth surface. <br /> <br />D. The asphalt pavement shall be completed in phases; the leveling course during construction <br />for temporary construction traffic and storage of materials and; the wearing (surface) course <br />just prior to turnover to Owner; unless the entire paving operation is completed just prior to <br />turnover to the Owner such that no construction traffic or storage of materials shall be allowed <br />on the finished pavement surface after its completion. Contractor shall schedule final surface <br />course paving operations so that the required waiting period specified in the Division 2 <br />Section “Pavement Marking” will allow project completion within the specified time. <br /> <br />E. Construct asphalt pavement in accordance with section 302-5 of the Reference Specification <br />and as shown on the Drawings.