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C. Aggregates for bituminous mixtures shall conform to the current MnDOT 3139 Graded Aggregate for <br /> Bituminous Mixtures. Copies of MnDOT's current specifications may be downloaded and printed from <br /> MnDOT's web site. <br /> D. Unless noted otherwise,the provisions in this Section are in addition to the referenced specification. <br /> PART 2-- PRODUCTS <br /> 2.1 MATERIALS <br /> A. Bituminous Tack Coat: <br /> 1. The bituminous material for tack coat will be limited to one of the following kinds of emulsified asphalt. <br /> However,the Engineer may authorize the use of medium cure cutback asphalt(MC-250) during the <br /> early and late construction season when it is anticipated the air temperature may drop below 32 <br /> degrees Fahrenheit.Cutback asphalt shall be used only when approved by the Engineer. <br /> (a) Emulsified Asphalt <br /> (1) Anionic SS-1,SS-1h <br /> (2) Cationic CSS-1,CSS-1h <br /> (b) Cutback Asphalt: <br /> (1) Medium Cure Liquid Asphalt MC-250 <br /> 2. Only Certified Sources are allowed for use. MnDOT's Certified Source List is located at the following <br /> link: Ihtt.p: www:.dot..state..rnI.:u./PLcrduct �kicllex..lhtrn� . <br /> B. Bituminous material and aggregate shall be as shown on the typical sections in the plans. <br /> PART 3-- EXECUTION <br /> 3.1 CONSTRUCTION REQUIREMENTS <br /> A. Bituminous Tack Coat <br /> 1. The tack coat shall not be applied when the road surface or weather conditions are unsuitable as <br /> determined by the Engineer. <br /> 2. At the time of applying bituminous tack coat material,the road surface shall be dry and clean and all <br /> necessary repairs or reconditioning work shall have been completed as provided for in the Contract and <br /> approved by the Engineer. <br /> 3. Unless otherwise indicated in the Plans or provisions,the bituminous tack coat material shall be <br /> applied within the application rates shown in the table below as based on pavement type or condition <br /> and type of bituminous material. The Engineer shall approve the time and rate of application. Only a <br /> MnDOT certified asphalt emulsion supplier is allowed to dilute the emulsion. When diluted,the <br /> supplier shall provide asphalt emulsion diluted 1-part emulsion to 1-part water. Dilution of asphalt <br /> emulsion in the field is not allowed. The Engineer may waive the tack coat requirement when multiple <br /> lifts are paved on the same day. <br /> Pavement Type or <br /> Condition Application Rate-gallons/sy <br /> Undiluted Emulsion Diluted Emulsion <br /> MC Cutback <br /> SS-1,SS-1H,CSS-1, (1 part Emulsion to 1 part water)1 MC-250 <br /> CSS-1H SS-1,SS-1H,CSS-1,CSS-1H <br /> New HMA 0.03-0.05 0.06-0.10 0.03— <br /> City <br /> .03—City of Elk River-R13.119052 PLANT-MIXED BITUMINOUS SURFACING <br /> August 2019 PAGE 02740-2 <br /> V050208©Bolton&Menk,Inc.2019,All Rights Reserved <br />