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<br />B. The Contractor shall demonstrate the ability to mix and apply slurry in a <br />satisfactory manner and to the approved mix design with each spreader vehicle. <br />The Contractor may not begin work until the ability to apply slurry as specified is <br />demonstrated to the Engineer. <br /> <br />SURFACE PREPARATION <br /> <br />3.03 <br />A. <br /> <br />Surface to receive slurry seal shall be prepared in accordance with the <br />requirements specified for preparing surfaces to receive asphaltic emulsion as <br />specified in Section 37-1.04, "Preparation for Seal Coat", of the Standard <br />Specifications. <br /> <br />Power sweepers shall be required to sweep from face of curb to face of curb. <br />This shall involve a minimum of three passes with a power broom street <br />sweeper (Mobile or equivalent). Pavement missed by or inaccessible to broom <br />sweepers shall be swept clean by other approved methods. Contractor shall <br />provide whatever flushing, compressed air, or other cleaning methods <br />necessary to remove all dirt and loose material from the pavement. <br /> <br />C. All existing raised pavement markers and thermoplastic markings shall be <br />removed and disposed of by the contractor. Said removal shall not occur <br />sooner than 2 days prior to the day that the sealing is performed. <br /> <br />3.04 APPLICATION AND WORKMANSHIP <br /> <br />A. The slurry seal shall be mixed, spread, and placed in accordance with the <br />provisions of Section 37-2 of the State Standard Specifications, with the <br />following exceptions and additions: <br /> <br />1. The slurry seal shall not be applied when either atmospheric or pavement <br />temperature is 55 degrees Fahrenheit and falling but may be applied when <br />either the atmospheric or pavement is 45 degrees Fahrenheit and rising. <br />The slurry seal shall not be applied during periods of abnormally high <br />relative humidity. Slurry seal shall not be applied when raining or foggy. <br /> <br />2. The slurry seal mixture shall not be applied prior to 8:00 A.M. Also, the <br />slurry seal mixture shall not be applied after 3:00 P.M. unless approved by <br />the Engineer. Approval of applications after 3:00 P.M. will only be for the <br />purpose of completing the section of work then underway. Beginning a new <br />section of work after 3:00 P.M. will not be permitted. <br /> <br />3. The surface shall be fogged with water directly proceeding the spreader. <br />The slurry mixture shall be of the desired consistency when deposited on <br />the surface. Total time of mixing shall not exceed four (4) minutes. A <br />sufficient amount of slurry shall be carried in all parts of the spreader at all <br />times so that complete coverage is obtained. No lumping, balling or <br />unmixed aggregate shall be permitted. No segregation of the emulsion and <br />aggregate fines from the coarse aggregate will be permitted. If coarse <br />aggregate settles to the bottom of the mix, the slurry will be removed from <br />the pavement. No excessive breaking of the emulsion will be allowed in the <br />spreader box. No streaks such as caused by oversize aggregate will be left <br />in the finished pavement. Ridges (especially at existing raised pavement <br />markers) and wash-boarding in the finished product will not be allowed. <br /> <br />4. The slurry seal shall be placed at a rate to produce 14 to 16 pounds of <br />aggregate per square yard for Type II slurry, unless approved by the <br /> <br />B. <br /> <br />SLURRY SEAL <br /> <br />02540-4 <br />