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Concrete Patching Material, Grout, and Mortar 9-20 9-20 Concrete Patching Material, Grout, and Mortar 9-20.1 Patching Material for Cement Concrete Pavement Concrete patching material will be prepackaged mortar extended with aggregate. The Patching mortar and patching mortar extended with aggregate shall contain cementitious 9-20.1(1) Patching Mortar Patching mortar shall conform to the following requirements: Compressive Strength ASTM Test Method Specification at 3 hours C 39 Minimum 3,000 psi at 24 hours C 39 Minimum 5,000 psi Length Change at 28 days C 157 0.15 percent maximum Total Chloride Ion Content C 1218 1 lb/yd 3 maximum Bond Strength at 24 hours C 882 (As modified by C 928, Section 9.5) Minimum 1,000 psi Scaling Resistance (at 25 cycles of freezing and thawing) C 672 (As modified by C 928, Section 9.4) 1 lb/ft 2 maximum 9-20.1(2) Patching Mortar Extended With Aggregate Patching mortar extended with aggregate shall meet the following requirements: Compressive Strength ASTM Test Method Specification at 3 hours C 39 Minimum 3,000 psi at 24 hours C 39 Minimum 5,000 psi Length Change at 28 days C 157 0.15 percent maximum Bond Strength at 24 hours C 882 (As modified by ASTM C928, Section 9.5) Minimum 1,000 psi Scaling Resistance (at 25 cycles of freezing and thawing) C 672 2 Maximum Visual Rating Freeze thaw C 666 Maximum expansion 0.10% Minimum durability 90.0% |