ACI 563M-18 Specifcations for Repair of Concrete in Buildings

ACI 563M-18 Specifcations for Repair of Concrete in Buildings. 3.1.1.2 Provide surface profle and remove laitance, debris, and bond-inhibiting materials using methods that shall satisfy these requirements as indicated in Contract Documents. 3.1.2 Submittals 3.1.2.1 Unless otherwise specifed, provide submittals as required by 3.1.2.2 to 3.1.2.4. 3.1.2.2 Before concrete removal, submit proposed equip- ment for concrete removal and surface preparation. 3.1.2.3 If the proposed concrete removal equipment uses water, submit a plan outlining the methods for control of water and the disposal of the removed materials. 3.1.2.4 Submit documentation of existing conditions, especially areas of preexisting damage and deterioration unrelated to the Work, including fnishes of surfaces, before starting demolition. 3.1.3 Quality assurance 3.1.3.1 Test for the minimum pull-of tensile bond strength between the repair material and the prepared substrate surface in accordance with ASTM C1583/C1583M as indi- cated in Contract Documents. 3.1.3.1(a) The required pull-of strength shall be at least equal to the minimum pull-of value as indicated in Contract Documents. 3.1.3.1(b) Report pull-of strength values to the Architect/ Engineer. 3.1.3.2 Mockups—Provide mockups as indicated in Contract Documents to demonstrate the efectiveness and suitability of various methods intended to be used for concrete removal and surface preparation. Architect/Engi- neer will evaluate the mockups and testing results to deter- mine if extent of concrete removal and proposed methods satisfy the project requirements and achieve desired tensile pull-of strengths. 3.2.1.4 Hydrodemolition—Implement hydrodemolition only in locations as indicated in Contract Documents. 3.2.1.5 Scarifying, scabbling, and milling/rotomilling— Minimize damage to the substrate that remains and provide surface profles as indicated in Contract Documents. 3.2.2 Equipment for concrete and reinforcement surface preparation and cleaning—Unless otherwise specifed, select the means and methods for surface preparation and provide cleaning of the concrete, reinforcement, and accessories that will produce results that satisfy specifed requirements. 3.2.2.1 Abrasive- and shot-blasting—Use oil-free abra- sive blasting capable of removing loose microfractured (bruised surface) or otherwise damaged/pulverized concrete surfaces, and providing a surface profle as indicated in Contract Documents. 3.2.2.2 Compressed air—Use equipment that delivers oil- free air that removes loose material and debris. 3.2.2.3 High- and ultra-high-pressure water jetting—35 to 310 MPa at 8 to 190 L/min water delivery equipment capable of removing loose/fractured concrete, and providing a surface profle as indicated in Contract Documents. 3.2.2.4 Low-pressure water cleaning—7 to 35 MPa at 8 to 38 L/min water delivery equipment capable of removing loose/fractured concrete, and providing a surface profle as...