Reparación de delaminaciones en áreas verticales y “sobre-cabeza” aplicadas a mano (RAP 6S)-Reparación de delaminaciones en áreas verticales y “sobre-cabeza” aplicadas a mano (RAP 6S) (PDF)

Reparación de delaminaciones en áreas verticales y “sobre-cabeza” aplicadas a mano (RAP 6S) (PDF)

Pdf Summary

The document is a practical guide from the American Concrete Institute (ACI) on manual repair techniques for vertical and overhead concrete delaminations. It emphasizes the use of hand-applied Portland cement-based repair mortars, ideal for shallow surface repairs in difficult-to-access areas. The guide lays out a step-by-step procedure including preparation, material application, and safety considerations.

<strong>Key Points:</strong>

1. <strong>Purpose and Application:</strong> 
   - Ideal for cosmetic repairs where delaminated or deteriorated concrete needs resurfacing. 
   - Suitable for walls, ceilings, columns, and façades with varying placement thickness, based on the specific repair needs.

2. <strong>Surface Preparation:</strong>
   - Remove loose or damaged concrete until healthy substrate is achieved.
   - Surface cleaning using abrasive methods or high-pressure washing is necessary to ensure proper bonding.
   - Remove corrosion from exposed rebar and consider applying a protective coating if specified.

3. <strong>Material Selection:</strong>
   - Use proprietary pre-packaged cementitious materials, often enhanced with polymers or additives for better physical properties.
   - Selection should consider factors like application thickness, handling, cost, color, and environmental conditions.

4. <strong>Application Process:</strong>
   - Proper mixing and hand-application of repair mortar.
   - Ensuring the material adheres tightly to the substrate.
   - Multiple layers may be required for deep repairs, with attention to finishing for aesthetic and protective purposes.

5. <strong>Safety Considerations:</strong>
   - Emphasizes the use of safety gear and adherence to OSHA standards, given the hazardous nature of cementitious products.

6. <strong>Verification:</strong> 
   - Quality checks via visual inspections, surface preparation confirmations, and tensile tests to assure good adhesion and longevity.
   - Consults various ACI and ICRI guidelines on concrete assessment and material selection for detailed guidance.

By outlining clear procedures and considerations, the guide aims to enhance the efficacy and quality of manual concrete repair jobs while ensuring safety and compliance with industry standards.

Keywords

concrete delaminations

manual repair techniques

Portland cement-based mortars

surface preparation

material selection

application process

safety considerations

ACI guidelines

overhead repairs

cosmetic concrete repairs