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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 - 6 <br />B. Cold mill existing asphalt concrete pavement in accordance with section 302-5.2 of the <br />Reference Specification. <br /> <br /> <br />3.3 PATCHING AND REPAIRS <br /> <br />A. Patching: Saw cut perimeter of patch and excavate existing pavement section to sound base. <br />Recompact new subgrade. Excavate rectangular or trapezoidal patches, extending 12 inches <br />(300 mm) into adjacent sound pavement, unless otherwise indicated. Cut excavation faces <br />vertically. <br />1. Tack coat faces of excavation and allow to cure before paving. <br />2. Fill excavation with dense-graded, hot-mix asphalt base mix and, while still hot, <br />compact flush with adjacent surface. <br />3. Partially fill excavation with dense-graded, hot-mix asphalt base mix and compact <br />while still hot. Cover asphalt base course with compacted, hot-mix surface layer <br />finished flush with adjacent surfaces. <br /> <br />B. Portland Cement Concrete Pavement: Break cracked slabs and roll as required to reseat <br />concrete pieces firmly. <br />1. Pump hot undersealing asphalt under rocking slabs until slab is stabilized or, if <br />necessary, crack slab into pieces and roll to reseat pieces firmly. <br />2. Remove disintegrated or badly broken pavement. Prepare and patch with hot-mix <br />asphalt. <br /> <br />C. Leveling Course: Install and compact leveling course consisting of dense-graded, hot-mix <br />asphalt surface course to level sags and fill depressions deeper than 1 inch (25 mm) in existing <br />pavements. <br />1. Install leveling wedges in compacted lifts not exceeding 3 inches (75 mm) thick. <br /> <br />D. Crack and Joint Filling: Remove existing filler material from cracks or joints to a depth of 1/4 <br />inch (6 mm). Refill with asphalt joint-filling material to restore watertight condition. Remove <br />excess filler that has accumulated near cracks or joints. <br /> <br />E. Asphalt paint: Apply uniformly to existing surfaces of previously constructed asphalt or <br />Portland cement concrete paving and to surfaces abutting or projecting into new, hot-mix <br />asphalt pavement. Apply at a uniform rate of 0.05 to 0.15 gal./sq. yd. (0.2 to 0.7 L/sq. m) of <br />surface. <br />1. Allow asphalt paint to cure undisturbed before paving. <br />2. Avoid smearing or staining adjoining surfaces, appurtenances, and surroundings. <br />Remove spillages and clean affected surfaces. <br /> <br />3.4 SURFACE PREPARATION <br /> <br />A. General: Immediately before placing asphalt materials, remove loose and deleterious material <br />from substrate surfaces. Ensure that prepared subgrade is ready to receive paving. <br />1. Sweep loose granular particles from surface of unbound-aggregate base course. Do not <br />dislodge or disturb aggregate embedded in compacted surface of base course. <br /> <br />B. Herbicide Treatment: Apply herbicide according to manufacturer's recommended rates and <br />written application instructions. Apply to dry, prepared subgrade or surface of compacted- <br />aggregate base before applying paving materials. <br />1. Mix herbicide with prime coat when formulated by manufacturer for that purpose.