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High-Pressure Grouting: A Beginner’s Guide

Introduction

High-Pressure Grouting or Injecting is a method that uses substances like PU or Epoxy to reinforce concrete structures by injecting them into cracks and voids. This process not only prevents water leakage but also enhances structural reinforcement. A high-pressure grouting machine is a powerful tool that is essential for achieving effective results with this method.

In this step-by-step guide, we will walk you through the process of using a high-pressure grouting machine, including the use of the machine, installing injection packers, and injecting polyurethane (PU) or Epoxy injecting agent with techniques for water leak repair. Whether you are a professional or a DIY enthusiast, this guide will provide you with expert tips and advice for ensuring successful results.

Required Tools & Materials

A picture of a R-102 High-Pressure Grouting Machine Model

High-Pressure Grouting Machine

This powerful tool is used to inject injection agents, such as PU or epoxy, into cracks and voids within concrete structures. Its high-pressure capabilities ensure the effective penetration of the injection agent, leading to better reinforcement and sealing.

A picture showcasing our lists of injeciton packers. We are injection packer manufacturer and supplier.

Injection Packers

These are small devices, with bodies made of aluminum and bases made of rubber to create full contact with the walls and prevent leakage, that are inserted into pre-drilled holes in the concrete. They serve as entry points for the injection agent, allowing for precise and controlled delivery of the grouting material into the structure.

RH-7001 Polyurethane (PU) Injection Agent Foam

Polyurethane (PU) or Epoxy Injection Agent

PU and epoxy are versatile substances used in water-leakage and crack repairs to fill and seal cracks and voids in concrete. They expand and harden upon injection, effectively preventing water leaks and reinforcing the structural integrity.

Construction Steps

1. Identify Cracks

Identify the location of the water leakage and the source of the water infiltration. This may involve inspecting the foundation, walls, or other structures for cracks or voids that may be allowing water to pass through. 
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2. Drill Holes

Drill holes in the wall or foundation where the injection packers will be inserted. The holes should be drilled at an angle of 45 degrees and should be at least the thickness of 2/3 of the structure. It is important to leave a distance of 20 – 30 cm between each hole to ensure that the foaming agent can effectively fill the crack or void.
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3. Install Injection Packers

Insert injection packers at least 3/4 of the length of the injection packer and use a wrench or a drill and twist until tightened
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4. Using High-Pressure Grouting Machine

Turn on the grouting machine and adjust the pressure as needed. Begin injecting the foaming agent or epoxy into the injection packer. Stop injecting when it starts to overflow and turn off the grouting machine. Large cracks may require additional injections to fully fill the crack or void.
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5. Wait until Hardened

Allow the foaming agent or epoxy to cure, this may involve waiting up to a day for the material to expand and harden, forming a durable and reliable seal.
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6. Remove Injection Packers

Once the foaming agent or epoxy has hardened, remove the injection packer by untwisting it. Also, check if leakage still occurs and, if necessary, repeat the process to fully seal the area.

7. Clean Up

Clean up any remaining reacting agents residue and fill in holes in walls or ceilings left by injection packers.

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