Sure-Grip® concrete protective liners made of HDPE, HDPE-el, PP, PVDF and ECTFE are produced with state-of-the-art manufacturing technology. This system has been successfully applied worldwide for more than 25 years and serves as a long-term alternative to spray-applied concrete protection products.
Sure-Grip prevents concrete corrosion and degradation and can substantially extend the lifetime of a structure. In addition, by preventing ex-filtration and infiltration, concrete protective liners provide direct protection for the environment and increased operating efficiencies. Furthermore, the unique anchoring system also enables construction in areas of significant back-pressure. Unlike spray-applied liners, which have to be reapplied regularly due to cracking or delamination, concrete protective liners are long-lasting. The reapplication of spray liners presents residuals cost with significant effort to empty and clean the tank as well as operational downtime.
Concrete protective liners combine the advantages of thermoplastics (flexible, ductile, corrosion resistant) with those of concrete (high strength, high stiffness). Thus, the concrete is protected effectively and the durability and life expectancy is increased.
- Applicable for a wide variety of concrete structures
- Secure mechanical anchoring to the concrete structure
- High elasticity to bridge cracks in the concrete
- High impact resistance
- Excellent shear resistance
- Suitable for aggressive media (corrosion resistant)
- Applicable within a wide temperature range
- Long life expectancy
- Low maintenance and easily cleanable
- Easy and safe installation
- Available in UV resistant materials.
Innovative Design for Leak-Proof Constructions
The unique V-shaped anchor studs, which are integrally formed onto the liner during the extrusion process to allow a secure mechanical anchoring of the concrete protective liner to the concrete guaranteeing optimum anchoring to the concrete. Depending on the specific project requirements, a variety of anchor designs, resins, and liner thicknesses and colors are available. Concrete protective liners are joined by welding which provides permanent and reliable joints. Different welding technologies, depending on the project requirements, are available for a secure and leak-proof joint:
- Butt welding
- Extrusion welding
- Hot wedge welding
- Hot gas welding
- Thickness supply ranges between 2 mm and 12 mm for Sure-Grip and between 2 mm and 5 mm for AGRU Ultra Grip.
- Sure-Grip and AGRU Ultra Grip are available in PP, PE, PE-el, PVDF, and ECTFE.
Lining of Precast Concrete Structures
AGRU’s concrete protective liners offer many benefits for the lining of precast concrete structures including prefabricated concrete elements, concrete pipes and manholes, tank constructions and oil/water separators.
Lining of Cast in-situ Structures
AGRU’s concrete protective liners are easily fabricated to the shape of the construction thanks to the quick and safe mounting to existing form-works by means of end profiles and tear off profiles. After the concrete sets, the concrete protective liner system is extrusion welded to provide a leak-proof solution. This installation method enables the installation of both the concrete protective liner and the form-work at the same time. In-situ structures include underground construction, foundations and bridges, areas where chemical media are used, transported, or stored and any type of basin.
AGRU’s concrete protective liners can be used to reline and rehabilitate many existing concrete structures. This is accomplished through the use of a form-work system and the introduction of grout or concrete into the interstitial space. The concrete protective liners can be prefabricated and pre-assembled in sections to significantly speed up the on-site installation efforts reducing production downtime and project costs.
Trenchless Relining of Underground Pipes
AGRU offers system solutions for trenchless relining which enable the rehabilitation of various cross sections and dimensions, independent of the degree of corrosion. Applications include segment and hose relining as outlined below.
For Segment Relining, a short prefabricated in-liner sections are inserted into the pipe or channel. These sections are then fixed to a form-work. The gap between the liner and the old pipe is then back-filled with viscous, high-flow grout. After the grout sets, the form-work is removed and the individual segments are welded together.
For Pipe Relining projects, the in-liner is custom-fabricated to be pulled between manholes. The process starts by sealing the in-liner with plugs. Water pressure is introduced to the pipe depending on the required grouting length. Finally, a special grout is injected into the gap between the liner and the old pipe. This application has a successful track record and can be used with section lengths of up to 650’. Rehabilitated diameters range from 12” up to 84”.