MANHOLES
Traditional SMS rehabilitation can be costly and time consuming.
The preferred rehab technology of municipalities and utilities Alternative Lining Technologies’ (ALT) custom fabricated liners create a protective barrier from corrosive gases and groundwater infiltration. Since 1998, ALT has been offering commercial and municipal customers peace of mind, affording a like-new condition to ageing infrastructure.
F
or 23 years, Alternative Lining Technologies (ALT) has been providing asset owners with the opportunity to rehabilitate – rather than reconstruct – ageing underground infrastructure. Lining solutions not only save on reconstruction 54 TRENCHLESS AUSTRALASIA DECEMBER 2021
projects; they also add years to sewer structures and protect against costly and damanging infiltration and exfiltration. ALT manufactures state-of-the-art rehab solutions for manholes, wet wells, and other structures. Since its introduction in 1998, CIPM liners from ALT have met the demands of countless commercial and municipal clients for projects both large and small. General manager Bruce Keys has worked in the sewer and wastewater construction industry for more than 35 years. Unlike other adhesives or coatings, ALT’s CIPM liners form a complete reinforced structure within the host pipe and can cater for all sizes of underground structures. The unique and patented design uses an inward-facing of polyvinyl chloride (PVC), which forms an impervious
barrier against corrosive sewer gas and groundwater infiltration. The custom liner is shipped in dry to the installer, where a custom-blended epoxy resin is mixed and applied to the CIPM liner onsite. The epoxy-coated liner is then inserted into the manhole interior. The underground liner is cured with heat and kept under pressure with steam, conforming the liner to the shape of the manhole. The continuous heat and pressure promotes high bonding strength to the substrate, and also helps the resin penetrate the substrate, forming a strong anchor. Typically, the liner takes an hour to corm a protective barrier in the manhole. ALT uses careful processes to ensure minimal downtime on every repair job.
