When these changes exceed the concrete’s maximum tensile strength, cracking occurs.
Once the reason for the crack has been determined, the appropriate action can be taken, whether it’s leaving the crack alone, injecting the crack with the appropriate material, or applying other suitable repair methods.
The repair of large voids in concrete segment linings can be difficult at the best of times. Repairs involve a team of experienced injection technicians and a range of equipment to carry out the repairs effectively. Head to the Procedures page for a detailed walkthrough on the repair of high flow water or large voids in concrete segment linings.
BluRez CSW is a water-reactive, single component, hydrophobic polyurethane designed to stop the ingress of high water flow. BluRez CSW comes with a catalyst to determine the speed of reaction. It is ideal for cracks up to 10mm thick.
Cracking in a tunnel environment occurs in the hardened preformed segments due to water pressure, weight loading or settling of the segments into a newly bored tunnel. When voids and leaks are present in a tunnel, it’s best to contact Bluey to discuss which product will aid the situation best. We’ve developed a range of resins and epoxy solutions including high foaming, fast setting and water-reactive products.
The product is best used for structural injection and grouting repairs, however, it can also be used for general concrete repairs, as a primer for porous concrete or as a sealer for floor toppings.
BluRez Epoxy 111 is a two component epoxy liquid which requires only mixing to form a low viscosity injection resin.
We’ve developed a number of URG and UCG waterstops for a variety of applications. We recommend discussing your project’s unique requirements with Bluey Engineers to assist in the correct product selection.