Founded in 2013, MPS Concrete Solutions provide concrete injection, movement joint, cavity drain, concrete repair and injection hose services. The highly trained installation teams hold NVQs in resin and grout injection, as well as CSCS, SSSTS and SMSTS certifications. They are also trained and qualified to work safely with mobile towers, cherry pickers, scissor lifts and in confined spaces. No matter the application or project, MPS and their DB Group counterparts provide hassle-free solutions and exceptional workmanship.
What is an injection hose?
Injection hoses are perforated hoses/channels installed in construction joints prior to the concrete pour. They have been used as a remedial waterproofing measure in joints for over 40 years, but MPS are increasingly using the technology as a futureproofing method. Once the encasing concrete has hardened sufficiently around it, the hose can be injected with a resin. Primed with resin and then sealed at one end, the pressure within the hose is increased as more resin is pushed in, until the release pressure is reached, and the low viscosity liquid is discharged into the joint. It then sets to a rubber or gel-like consistency (depending on the resin type), sealing the joint.
Where can it be used?
Injection hoses are installed onto an existing substrate at the interface where new concrete is to be poured. Placed centrally, the hose then acts as a delivery system, placing the resins used to seal the joint directly into the middle of the seam. The resin can be injected as soon as the concrete has reached enough strength, but typically for preventative injection, MPS inject when the concrete has had time to shrink and/or settle. Whilst its installation is uncomplicated, careful placement and fixing of the hose is critical to the system’s success.
This technique is particularly suited to joints formed where concrete is poured against a dissimilar substrate, such as sheet piling. Here, it is imperative that the hose is fitted closely to the corrugations of the pile to enable full contact against the sheet face. This ensures the resin is flooded into any voids in the joint once the concrete has shrunk back. The traditional types of waterbar used in construction joints often have limitations in this scenario. PVC sectional waterbar is not suited for use on sheet piling and hydrophilic waterbar should not be left open to the elements prior to the concrete pour and needs full encasement within the joint for its swell to block any water path. Casting in injection hoses, to deliver expanding resins into the joint as a preventative measure, solves these issues.
Benefits of using injection hoses:
- Installation directly into the construction joint
- Can be used in challenging and complex situations
- Flexible alternative to traditional joint waterproofing systems
- Suitable for use where adverse weather conditions are expected
- An injectable solution to ensure a watertight joint for the life of the structure
- No kicker required, therefore reducing site labour and construction programme
- Using MPS to install, in conjunction with using PUDLO concrete can enable the PUDLO 20 Year warranty to be extended to the joints as well as the concrete.