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STRUCTURAL REPAIR OF CONCRETE <br /> Effective: March 15, 2006 <br /> Revised: August 9, 2019 <br /> Description. This work shall consist of structurally repairing concrete. <br /> Materials. Materials shall be according to the following. <br /> Item Article/Section <br /> (a) Portland Cement Concrete (Note 1) .........................................................................1020 <br /> (b) R1, R2, or R3 Concrete (Note 2) <br /> (c) Normal Weight Concrete (Notes 3 and 4) <br /> (d) Shotcrete (High Performance) (Notes 5 and 6) <br /> (e) Reinforcement Bars .............................................................................................1006.10 <br /> (f) Anchor Bolts ........................................................................................................1006.09 <br /> (g) Water ........................................................................................................................1002 <br /> (h) Curing Compound ...............................................................................................1022.01 <br /> (i) Cotton Mats .........................................................................................................1022.02 <br /> (J) Protective Coat ....................................................................................................1023.01 <br /> (k) Epoxy (Note 7) .........................................................................................................1025 <br /> (1) Mechanical Bar Splicers ....................................................................................508.06(c) <br /> Note 1. The concrete shall be Class SI, except the cement factor shall be a minimum 6.65 <br /> cwt/cu yd (395 kg/cu m), the coarse aggregate shall be a CA 16, and the strength <br /> shall be a minimum 4000 psi (27,500 kPa) compressive or 675 psi (4650 kPa) <br /> flexural at 14 days. A high range water-reducing admixture shall be used to obtain <br /> a 5-7 in. (125-175 mm) slump, but a cement factor reduction according to Article <br /> 1020.05(b)(8) is prohibited. A self-consolidating concrete mixture is also <br /> acceptable per Article 1020.04, except the mix design requirements of this note <br /> regarding the cement factor, coarse aggregate, strength, and cement factor <br /> reduction shall apply. <br /> Note 2. The R1, R2, or R3 concrete shall be from the Department's qualified product list of <br /> Packaged, Dry, Rapid Hardening, Cementitious Materials for Concrete Repairs. <br /> The R1, R2, or R3 concrete shall comply with the air content and strength <br /> requirements for Class SI concrete as indicated in Note 1. Mixing shall be per the <br /> manufacturer's recommendations, except the water/cement ratio shall not exceed <br /> the value specified for Class SI concrete as indicated in Note 1. A high range <br /> water-reducing admixture shall be used to obtain a 5-7 in. (125-175 mm) slump, <br /> and a retarder may be required to allow time to perform the required field tests. <br /> The admixtures shall be per the manufacturer's recommendation, and the <br /> Department's qualified product list of Concrete Admixtures shall not apply. <br /> Note 3. The "high slump" packaged concrete mixture shall be from the Department's <br /> qualified product list of Packaged, Dry, Formed, Concrete Repair Mixtures. The <br /> materials and preparation of aggregate shall be according to ASTM C 387. The <br />