Reparación de grietas estructurales por inyección de resinas epóxicas (RAP 1S)-Reparación de grietas estructurales por inyección de resinas epóxicas (RAP 1S) (PDF)

Reparación de grietas estructurales por inyección de resinas epóxicas (RAP 1S) (PDF)

Pdf Summary

The document is a practical guide from the American Concrete Institute (ACI) detailing procedures for repairing structural cracks in concrete using epoxy resin injection. This method is generally employed when standard repair techniques cannot adequately penetrate the crack to distribute repair materials. The process, which can restore structural integrity and reduce moisture infiltration for cracks 0.05 mm wide or greater, involves several critical steps.<br /><br />Firstly, it's crucial to clean the surrounding area of the crack to ensure the sealing materials adhere effectively to the concrete. Various cleaning tools such as wire brushes or high-pressure water can be used to remove contaminants. Specific attention is needed for cracks caused by ongoing issues such as reinforcement steel corrosion; addressing the root of the problem is essential before repair.<br /><br />The guide advises selecting appropriate epoxy resin based on the crack size and location, following standards like ASTM C881. Generally, low-viscosity epoxies are suitable for smaller cracks, while medium to gel-like consistencies are recommended for wider or hard-to-access areas. Safety is a priority, with recommendations for protective equipment and adherence to Material Safety Data Sheets (MSDS).<br /><br />The repair process involves installing entry ports along the crack, applying an external seal, and injecting the resin until penetration is sufficient, avoiding excessive pressure that might damage the seal. After injection, entry ports and seals are removed unless left in place for aesthetic reasons.<br /><br />Quality assurance involves visual inspections, core samples, and possibly non-destructive evaluations like ultrasonic testing to ensure proper epoxy penetration. Prior to undertaking repairs, a pre-construction meeting with all stakeholders is recommended to discuss project parameters and objectives.

Keywords

epoxy resin injection

structural cracks

concrete repair

American Concrete Institute

cleaning procedures

ASTM C881

safety equipment

quality assurance

reinforcement steel corrosion

non-destructive evaluation