Thanks to its 100% calcium aluminate nature, SewperCoat® induces a "bacterio-static effect" inhibiting the acid generation at the source; because it cuts down the acid source, outstanding biogenic corrosion resistance is achieved.
SewperCoat® being a cementitious mortar, it is mixed, pumped and sprayed using conventional equipment. Once the substrate is well prepared, a single monolithic layer is applied in one go. No primer, no multi-layer system, no glass wire mesh, only a smooth layer of high performance mortar that will turn hard within a few hours.
SewperCoat® loves water! Good news, as sewers are quite damp places… Some inert liners require a dry surface to bond, calling for tricky, time consuming and costly drying process. On the opposite hand, because it is based on calcium aluminate cement, SewperCoat® needs water to hydrate, and will develop strong adhesion to damp concrete substrate. This enables installation in a live sewer.
SewperCoat® normally starts to harden in 6 to 8 hours, and reaches over 40 MPa within 24 hours. When live sewer conditions are constraining the time schedule, it is possible to accelerate SewperCoat® to get surface hardening as quick as 30 minutes. This a very unique and valuable feature to avoid by-pass costs in most circumstances.
SewperCoat® is a cementitious mortar with high quality synthetic aggregates. It develops compressive strength in excess of 40 MPa within 24 hours. Thus, it can be utilized to replace the corroded concrete and rebuild the original profile to restore the integral structural integrity. Trying to restore the profile with a conventional mortar and then waiting days for curing before applying a protection layer involves doing 2 underground interventions. In most situations, doing everything at once by applying a single layer of SewperCoat® will end-up as a simpler, faster and less costly solution.
SewperCoat® is a high quality cementitious mortar which reaches over 40 MPa within the first day. As such, it provides a rock solid barrier that will prevent any further infiltration through the surface covered.
Another side benefit of SewperCoat® is its high abrasion resistance. Because of the exceptional hardness of its 100% calcium aluminate synthetic aggregates, SewperCoat® exhibits high abrasion resistance that may be of value when sewer flow is heavily loaded with sand or other abrasive sediments.
Biogenic corroded sewers are by definition confined spaces, and this imposes additional constraints for rehabilitation. Organic polymers like epoxy release volatile organic compounds when they are mixed and applied. These compounds have been found to be are harmful and this can be an issue when dealing in the confined space of a sewer. SewperCoat® is a 100% calcium aluminate cementitious mortar which hardens upon the hydration of cement. As such, it does not contain volatile compounds, making its use simpler and safer.
SewperCoat® is mixed, pumped and sprayed with conventional construction equipment. It is applied quickly in a single operation, in less than 2 hours for a typical manhole. After, it will provide decades of outstanding durability - protection for generations - making the installation cost a most advisable investment for the municipality.
One key aspect of Sustainable Development is the rational use of raw materials. Because SewperCoat® provides an outstanding resistance to biogenic corrosion, with the potential for decades of reliable service-life, it is a very rational use of raw materials.