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I <br /> 1 Section 9-20, Concrete Patching Material, Grout, and Mortar I <br /> 2 January 7, 2019 <br /> 3 9-20.1 Patching Material I <br /> 4 This section, including title, is revised to read: <br /> 5 <br /> 6 9-20.1 Patching Material for Cement Concrete Pavement <br /> 7 Concrete patching material shall be prepackaged mortar extended with aggregate. The <br /> 8 amount of aggregate for extension shall conform to the manufacturer's recommendation. <br /> 9 <br /> I <br /> 10 Patching mortar and patching mortar extended with aggregate shall contain cementitious <br /> 11 material and conform to Sections 9-20.1(1) and 9-20.1(2). The Manufacturer shall use the <br /> 12 services of a laboratory that has an equipment calibration verification system and a I 13 technician training and evaluation process in accordance with AASHTO R 18 to perform all <br /> 14 tests specified in Section 9-20.1. <br /> 15 <br /> 16 9-20.1(1) Patching Mortar <br /> 17 Patching mortar shall conform to the following requirements: <br /> 18 <br /> Compressive Strength ASTM Test Method Specification I <br /> at 3 hours C 39 Minimum 3,000 psi <br /> at 24 hours C 39 Minimum 5,000 psi <br /> Length Change I I <br /> at 28 da s ' C 157 0.15 percent maximum <br /> Total Chloride Ion Content C 1218 1 lb/yd3 maximum <br /> Bond Stren.th <br /> I <br /> at 24 hours C 882 (As modified by C Minimum 1,000 psi <br /> 1 928, Section 9.5) <br /> Scaling Resistance (at 25 C 672(As modified by C 1 lb/ft2 maximum <br /> cycles of freezing and 928, Section 9.4) <br /> j thawing) I <br /> 19 I 20 9-20.1(2) Patching Mortar Extended with Aggregate <br /> 21 Patching mortar extended with aggregate shall meet the following requirements: <br /> 22 I Compressive Strength _ ASTM Test Method 1 Specification 1 <br /> at 3 hours C 39 Minimum 3,000 psi <br /> at 24 hours C 39 Minimum 5,000 psi <br /> I <br /> Length Change <br /> at 28 days C 157 0.15 percent maximum <br /> Bond Strength _ I <br /> at 24 hours C 882(As modified by Minimum 1,000 psi <br /> ASTM C928, Section 9.5) <br /> Scaling Resistance (at 25 C 672 2 Maximum Visual Rating <br /> cycles of freezing and <br /> thawing) <br /> Freeze thaw C 666 Maximum expansion 0.10% <br /> Minimum durability 90.0% I 23 <br /> I <br /> City of Everett Page AM-100 Amendments <br /> Everett Downtown Streetscape Improvement March 22, 2019 <br /> I <br />