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<br /> <br />Page | 20 <br /> <br />Pavement Management Technical Assistance (P-TAP) Round 24 <br />Slurry Seals10- Preventative Maintenance Treatment <br />A slurry seal is a surface treatment with mixtures containing asphalt emulsion, graded aggregates, <br />fillers, water, and other additives to control the break and set time of the mixes. These treatments are <br />designed to extend the life of asphalt pavements in good condition by providing skid resistance, <br />restricting moisture intrusion, protecting the structure from further oxidation and raveling, and <br />restoring a uniform black appearance. The slurry seal provides quick construction times and minimal <br />disruption to the traveling public and can extend the life of the pavement by five to seven years. The <br />City addresses load-related distress before applying a slurry seal. The City’s maintenance strategy for <br />slurry seal and slurry seal with base failure repair is triggered to occur every eight years. Arterial, <br />Collectors, and Residential streets have a maximum of two (2) slurry seals before the system <br />recommends a restoration treatment that warrants an AC Overlay with Fabric (1.5”). <br /> <br />AC Overlay - Rehabilitation Treatment <br />Also known as “Mill and Fill,” this treatment targets pavement at risk to fair condition without signs of <br />load-related distress. The treatment generally involves grinding the edges of existing pavement and <br />placing a new layer of asphalt concrete (AC) on top of the existing pavement. Asphalt concrete, or Hot <br />Mix Asphalt (HMA), is a mixture of asphalt oil, crushed rock, gravel, and sand. <br /> <br />AC Overlay with Pavement Fabric - Rehabilitation Treatment <br />This treatment targets streets in fair to good condition with signs of load-related distress. The <br />treatment generally involves grinding the edges of the existing pavement and placing a layer of paving <br />mat/fabric on it before applying a new surface course of asphalt concrete over the top of the existing <br />pavement. A paving mat is an engineered pavement interlayer to create a moisture-resistant barrier <br />and retard reflective cracking, which helps prolong the pavement service life. <br /> <br /> <br />10 https://roadresource.org/treatment_resources/slurry_seal <br />Page 188 of 228