Use of injection resin in concrete cracks When planned step by step, the durability of structures increases significantly. Cracks that form on concrete surfaces can lead to water leaks and reinforcement corrosion over time. Therefore, choosing the right resin and carefully following the application steps are crucial. This is especially true in industrial buildings, parking lots, or areas requiring waterproofing. injection resin applications extends structural life. In such projects, Sempoly Construction Chemicals Polyurethane and epoxy-based resins developed by provide high performance. However, surface preparation, equipment selection, and application techniques must proceed in a specific order before application.

What is Injection Resin and Why is It Used?

Injection resin is a filling method that involves injecting a low-viscosity chemical compound under pressure into cracks and voids in concrete surfaces. This material prevents water penetration, strengthens load-bearing capacity, and integrates the surface. However, the type of resin should be selected based on the crack width and depth. For example, polyurethane injection resins are preferred in areas exposed to water. These products thanks to their elasticity creates a barrier resistant to water pressure.

Sempoly's Long-lasting solutions in waterproofing with polyurea coatings As mentioned in the article, "Products with high chemical resistance prevent the harmful effects of water for many years. However, the equipment used during injection, pressure values, and temperature conditions also directly affect the resin's performance. Viscosity changes, especially during winter months, should be taken into account. Therefore, utilizing Sempoly's technical consulting services is advantageous for applications carried out by professional teams.

Moreover, Long-lasting protection in industrial areas with polyurea coating These solutions support both the surface protection and aesthetic integrity of the concrete. This allows surfaces to be reused after crack repair. However, if the correct resin type is not selected, there is a high risk of crack recurrence. Therefore, the application process must be carefully followed step by step.

Preparation Process Before Injection in Concrete Cracks

Injection application Cleaning the cracks before starting is crucial. Dust, dirt, oil, and loose particles should be removed from the surface with special brushes. However, care must be taken to avoid damaging the surface during cleaning. Mechanical measurements should be taken to determine the depth of the crack, and detailed analysis with ultrasonic devices, if necessary. These measurements ensure accurate resin content calculations.

Sempoly's parking lot floor protected with polyurea As seen in applications, properly prepared surfaces allow the resin to bond more strongly to the surface. However, during the surface preparation phase, injection packers should be placed at the ends of the crack. These packers ensure the resin reaches the crack depth in a controlled manner.

Additionally, the surface's moisture content should be checked. Epoxy resins may not perform adequately on very moist surfaces. In these cases, polyurethane resins that can react with water should be preferred. If the surface temperature is low, slightly warming the resin will facilitate application. However, excessive heat can compromise the resin's viscosity. Therefore, application at temperatures between 20 and 25°C is recommended.

After cleaning and surface preparation, the injection equipment should be tested. Pump pressure, mixing speed, and hose connections should be checked. A small area test should be conducted to ensure the mixture is homogeneous. If the resin is not mixing evenly, the viscosity should be adjusted.

In the Next Section: Injection Application Steps and Final Checks

In the following section, I'll explain the injection application sequence, resin pressure settings, curing times, and final inspection processes. I'll also detail the application results with examples from Sempoly's waterproofing product portfolio.