Crack Injection Training for Engineers

Injection Procedure (for Slabs) Reference: General Epoxy Resin Injection Method for Structural Crack Repair. 1- Material Product: Saveto ER 717 – Two-component epoxy resin for crack injection Purpose: To fill structural cracks in concrete slabs and restore monolithic integrity. 2. Surface Preparation Clean the surface thoroughly to remove dust, oil, laitance, or loose particles. Use a wire brush or compressed air to clean visible cracks. Ensure the surface is dry and sound. Moisture affects bonding. 3. Crack Port Installation Install injection ports (packers) at regular intervals along the crack line (typically every 20–30 cm). Seal the crack surface between ports using Saveto ER 717 mixed with filler or other epoxy putty. Allow the surface seal to cure (approx. 4–6 hours) before injection. 4. Mixing the Material Mix Part A and Part B of Saveto ER 717 as per manufacturer’s ratio (typically 2:1 by volume, refer to TDS). Mix thoroughly using a low-speed drill with mixing paddle for at least 3 minutes. Avoid entrapping air during mixing. 5. Injection Process Start injecting at the lowest port (for vertical) or one end (for horizontal/slab) using a manual or mechanical injection pump. Inject slowly until epoxy flows out of the next port. Plug the filled port and move to the next. Continue until the entire crack length is injected and filled. 6. Curing Allow the injected resin to cure as per Saveto ER 717 curing time (typically 24 hours at 25°C). Do not disturb or load the slab during curing. 7. Post Injection Remove ports and grind/clean surface if required. Conduct inspection and testing if needed (e.g., hammer tap, core cutting, or NDT). References Saveto ER 717 Technical Data Sheet (TDS) ICRI Guidelines No. 210.1R & ACI 503R also checking the specs before start injection avoid differences .

You see a leak like the one at the beginning of this video. What’s your first thought? On many construction sites, the first reaction is: “Let’s drill and inject foam – it’s leaking.” That’s an approach where only speed matters. I see people drilling hundreds of holes, hoping for a miracle, and then surprised when they say “The resin didn’t work.” Let me say this loud and clear: resin (at least the one from ResinBau 😉) always works. IT’S THE METHOD THAT FAILS MOST OFTEN! A real, effective injection is not a coincidence. It’s a process based on analysis and logic. This is our working philosophy: 🔍 ANALYSIS, NOT GUESSWORK: Before we even touch a drill, we study the problem. What is the geometry and direction of the crack? Is the leak seasonal? What’s the cause? Only then do we choose the technology and material. 📐 PLANNING, NOT RANDOMNESS: We calculate the drilling angle relative to the crack. We determine the depth. We plan the placement of packers. Cleaning the holes is a must, not an option. 🧪 TEST FIRST, THEN SCALE UP: We always start with a test injection on a small section. We check whether our assumptions are correct. Only when we are 100% sure the process works – we scale it to the entire area. Why is this so important? Because in injection work, everything happens out of sight. It’s not a coating you can just touch up. There is no “Undo” button here. One mistake – wrong angle, too much pressure – and you can permanently damage the structure. If there’s only one thing you take away from this post, let it be this: START WITH THINKING. NOT WITH THE PACKER. 📘 Curious to learn more? You’ll find more practical tips, field strategies, and case studies in my new book: Cracking the Injection Code Vol. 1 – now available in English. 👇 Let me know in the comments if you’ve come across similar “magical” repairs in your work!

Method Statement for Crack Injection with Sika Material 1. Introduction This method statement outlines the procedures for crack injection in concrete structures using Sika materials. The goal is to effectively repair cracks and prevent further deterioration. 2. Scope * Project: [Project Name] * Location: [Project Location] * Material: Sika [Product Name] * Scope: Injection of cracks in [Structural Element] 3. Materials * Sika [Product Name] * Injection pump * Injection nozzles * Cleaning equipment * Safety equipment 4. Equipment * [List of necessary equipment, such as drills, hammers, etc.] 5. Procedure * Crack Preparation: * Cleaning: Remove dirt, debris, and loose material from the crack surface using appropriate cleaning methods. * Widening: If necessary, widen the crack to allow for proper penetration of the injection material. * Drying: Ensure the crack is completely dry before proceeding. * Injection Nozzle Placement: * Drilling: Drill holes at strategic locations along the crack to accommodate the injection nozzles. * Nozzle Insertion: Insert the injection nozzles into the drilled holes, ensuring a tight seal. * Material Preparation: * Mixing: Prepare the Sika material according to the manufacturer's instructions. * Loading: Load the prepared material into the injection pump. * Injection Process: * Pressure Control: Set the injection pump to the appropriate pressure based on the crack's depth and the material's viscosity. * Injection: Gradually inject the material into the crack, monitoring the flow rate and pressure. * Observation: Observe the crack for signs of filling and expansion. * Curing: * Protection: Protect the injected area from environmental factors (e.g., rain, extreme temperatures) to allow for proper curing. * Time: Allow the material to cure according to the manufacturer's specifications. 6. Quality Control * Visual Inspection: Visually inspect the injected crack for complete filling and proper penetration. * Testing: If required, conduct non-destructive testing (e.g., ultrasonic testing) to verify the effectiveness of the injection. 7. Safety * Personal Protective Equipment (PPE): Ensure all workers wear appropriate PPE, including safety glasses, gloves, and respiratory protection. * Hazardous Materials: Handle Sika materials with care and follow safety guidelines provided by the manufacturer. 8. Documentation * Record Keeping: Maintain detailed records of the injection process, including material used, pressure settings, and inspection results. Note: The specific procedures and materials may vary depending on the project's requirements and the characteristics of the crack. Always consult the manufacturer's guidelines for the selected Sika product.