Industry Sector & Application:
Waste and Wastewater Infrastructure
Concrete Protection Liner
Wastewater Management focuses on minimizing the adverse effects of solid, liquid, and gaseous waste on human health and the environment. Infrastructure such as sewer systems and wastewater treatment cells that contain either solid, industrial, hazardous, or domestic sewage waste and wastewater play a critical role in our overall quality of life and environment sustainability
Protecting this often concrete-based infrastructure from corrosion or mechanical damage is necessary to ensure effective functioning and prevent costly structural failure and environmental harm.
Titan’s Concrete Protection Liner is a high-density polyethylene (HDPE) geomembrane sheet with anchors on one side that lock into applied surfaces. Made with one of the most chemically resistant geosynthetic materials, it is used to protect concrete structures from corrosion, erosion and mechanical damage. Providing superior long-term protection, Concrete Protection Liner can help extend the lifespan of a wide variety of concrete structures including cast-in place sewer tunnels, sump pits, liquid storage tanks and more.
In this application, the client was looking to install a combination of a force main and gravity sewer system to carry sewage from a pumping station to a Water Pollution Control Centre. The purpose of this new sewer system was to increase capacity so new developments could be built.
Titan was hired to supply and install 315m2 of Concrete Protection Liner (CPL) split between a 46′ deep vortex chamber and a 15′ deep drop chamber. CPL was selected to protect the concrete chambers from microbial induced corrosion and infiltration. As part of this project Titan welded gaps between the liner and sealed the pipes coming into the chambers.
What’s the Best Approach?
Prolonging Service Life of Concrete Wastewater Management Structure
All concrete structures in a wastewater management system, such as sewer tunnels or processing pits, must be protected with an impermeable liner that is chemically resistant.
The main risk factor for concrete wastewater infrastructure is corrosion from hydrogen sulfide, and the way to mitigate this risk is to create a barrier between the concrete and the hydrogen sulfide.
Concrete is porous and provides an environment for bacteria to harbour if it’s not lined or protected correctly. Bacteria dying off within the concrete results in corrosion throughout the structure.
Vortex Grit Chambers and Erosion
Vortex grit chambers are designed to filter grit and other solid materials out of wastewater before it continues to further treatment via a force main or gravity sewer system. Grit causes significant erosion on concrete structures that would be further exacerbated by corrosion due to gas.
Drop Chambers and Erosion
Drop chambers allow workers to access sewer tunnels and other chambers for inspection, maintenance and repair. Safety is a major consideration for selecting an impermeable liner in drop chambers and manholes.
With these factors considered, Titan was selected to install our Concrete Protection Liner in the vortex grit chamber and drop chamber to protect these structures and optimize their lifespan.
The Conventional Solution vs. Titan’s Concrete Protection Liner
There are many options for liners or coatings that offer resistance against corrosion and erosion, but they miss the mark on long-term strength and performance.
Spray coating is a common conventional option that is not as effective as an embedded liner. Some issues with spray coating include:
- Application requires specific conditions with low humidity and a certain moisture content. These conditions are difficult to create, especially when working on retrofits or existing structures that need to be rehabilitated.
- Only provides a surface bond that is susceptible to back pressure, leaks and corrosion originating from behind the coating.
- Continual rehabilitation is required, as the coating weakens overtime, resulting in long-term maintenances costs.
- Does not meet industry standards for back pressure resistance.
Embedded Concrete Protection Liner
Titan’s Concrete Protection Liner is an engineered high-density polyethylene (HDPE) geomembrane sheet, one of the most chemically resistant geosynthetic materials available today. HDPE is resistant to all normal waste streams that would be found in a wastewater system.
Concrete Protection Liner addresses the following key concerns with regards to wastewater infrastructure protection:
- Creating an impermeable barrier.
- Fully adhering to the concrete substrate.
- Cost-effective and easy to fabricate and install.
- Exceptional design life.
Advantages of Titan’s Concrete Protection Liner
Titan’s Concrete Protection Liner (CPL) provides two forms of protection for concrete wastewater infrastructure: protection from microbial induced corrosion and protection from infiltration and in-flow.
Concrete Protection Liner can be used for pre-cast, port-in-place structures, or rehabilitation applications. When CPL is applied, the concrete cures around the anchors, or the embedment strip of the liner, allowing the liner to become a permanent part of the structure.
When CPL is installed, the design life is the life of the concrete structure.
If there’s any back pressure that hits the liner, in pipe for example, the water will divert around the anchors on the back of the liner, and it won’t push the liner out of the wall.
Titan’s CPL protects against microbial induced corrosion from substances such as hydrogen sulfide that would eat away at the concrete and protects against infiltration and in-flow. It’s the only technology that provides secondary containment in applications such as manholes, pipe, chambers, and other types of concrete structures.
Providing superior long-term protection, CPL can help extend the lifespan of a wide variety of concrete structures, including municipal and industrial wastewater treatments plants and systems.
Concrete Protection Liner Benefits:
- Material provides the highest degree of chemical resistance.
- High pull-out strength.
- Minimal lateral movement due to thermal expansion.
- Excellent protection against chemical and mechanical damage.
- Resistant to UV degradation.
- Can be custom prefabricated to a specific dimension or geometric shape.
- Can be butt welded, extrusion welded, or electrofusion welded.
Concrete Protection Liner Application
Titan supplied and installed 315m2 of Concrete Protection Liner split between a 46′ deep vortex grit chamber and a 15′ deep drop chamber. To install, the liner was inserted into the wet concrete slabs that would from the chamber walls. When the concrete cured, the embedment strip formed an integral part of the substrate surface providing long-term protection against chemical, gas and corrosion attack.
The Concrete Protection Liner was chosen to protect the chambers made of concrete from gases that would corrode the concrete if left exposed.
As part of this project Titan also welded the gaps between the chamber sections and sealed the pipes coming into the chambers.
This application will extend the lifespan of these concrete structures, separating them from the harsh materials in the wastewater, eliminating the flaking or peeling that would occur with alternative liner options, and saving the owner from costly repairs.
Features of Concrete Protection Liner
- Made of high-density polyethylene (HDPE).
- Comes in panels measuring 2.44 m wide and up to 70 m long.
- Thickness ranges from 2.0 – 5.0 mm.
- 1200 studs /m².
- Studs are approx. 10 mm tall.
- Locking studs average pull out strength ~ 70 kg/stud.
- Available in customized pre-cast form.
- Colour options: black or grey.
Concrete Protection Liner is Suitable for Many Applications
- Cast in place concrete structures/tunnels
- Concrete pipe lining
- Lift stations
- Sewer & water treatment plants
- Storage pads
- Processing pits
- Pre-cast pipes
- Pre-cast manholes
- Prefabricated structures
Titan’s Fabrication and Installation Service
Concrete Protection Liner is prefabricated, and installed by Titan’s manufacturer-trained and IAGI certified technicians.
Titan’s Value Added Service
As a leader in geosynthetics, Titan works with engineering consulting firms and general contractors to provide sustainable product solutions that integrate into the design and construction of various wastewater management infrastructure projects.
In addition to product supply and installation, we are happy to provide complimentary design assistance on select project types.
Request Information or Get a Quote
Interested in Concrete Protection Liner? We have project specialists who are ready to help! Request a consultation using the form below.
Would you rather discuss over the phone? Give us a call at 1-866-327-1957