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I <br /> II <br /> 1 9-20.1 Patching Material for Cement Concrete Pavement <br /> 2 Concrete patching material shall be prepackaged mortar extended with aggregate. The <br /> 3 amount of aggregate for extension shall conform to the manufacturer's recommendation. <br /> 4 <br /> 5 Patching mortar and patching mortar extended with aggregate shall contain cementitious <br /> 6 material and conform to Sections 9-20.1(1) and 9-20.1(2). The Manufacturer shall use the <br /> 7 services of a laboratory that has an equipment calibration verification system and a <br /> 8 technician training and evaluation process in accordance with AASHTO R 18 to perform all <br /> 9 tests specified in Section 9-20.1. <br /> I <br /> 10 <br /> 11 9-20.1(1) Patching Mortar <br /> 12 Patching mortar shall conform to the following requirements: <br /> 13 <br /> I <br /> Compressive Strength ASTM Test Method Specification <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 /> Total Chloride Ion Content C 1218 1 Ib/yd3 maximum <br /> Bond Strength <br /> at 24 hours C 882 (As modified by C Minimum 1,000 psi <br /> 928, Section 9.5) <br /> I <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 /> thawing) <br /> 14 <br /> I <br /> 15 9-20.1(2) Patching Mortar Extended with Aggregate <br /> 16 Patching mortar extended with aggregate shall meet the following requirements: <br /> 17 <br /> Compressive Strength ASTM Test Method Specification <br /> at 3 hours C 39 Minimum 3,000 psi <br /> at 24 hours C 39 Minimum 5,000 psi <br /> Length Change <br /> at 28 days C 157 0.15 percent maximum <br /> Bond Strength 111at 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 /> I <br /> thawing) <br /> Freeze thaw C 666 Maximum expansion 0.10% <br /> Minimum durability 90.0% i 18 <br /> 19 9-20.1(3) Aggregate <br /> 20 Aggregate used to extend the patching mortar shall conform to Section 9-03.1(4) and <br /> 21 be AASHTO Grading No. 8. A Manufacturer's Certificate of Compliance shall be <br /> 22 submitted showing the aggregate source and the gradation. Mitigation for Alkali Silica <br /> 23 Reaction (ASR) will not be required for the extender aggregate used for concrete <br /> 24 patching material. <br /> I <br /> 25 <br /> City of Everett Page AM-130 Amendments <br /> I <br /> Everett Station 80 Stall Parking Expansion June 2019 <br />