Wastewater Clarifier & Concrete Structure Relining
Spalled, rebar-exposed concrete clarifier rebuilt and relined for continued immersion service.
What was failing
A concrete clarifier and the structures around it sit under constant immersion and steady microbial and chemical attack. Over time the surfaces spalled and degraded, and the embedded rebar became exposed and began to corrode. Once rebar corrodes it expands and breaks away more concrete, so the damage spreads and the structure loses watertightness. Left untreated, the clarifier can no longer hold or contain flow as intended.
How AAS approaches it
We remove all unsound and degraded concrete back to a solid base and clean the exposed rebar. We treat the steel to repassivate it, then rebuild the lost section with a cold-applied repair mortar that returns the original profile. After the substrate is sound and shaped, we line the surfaces against immersion so the structure stays watertight and protected from ongoing chemical and microbial attack.
Assess and isolate
We survey the clarifier and surrounding structures to map spalling, delamination, and the extent of exposed and corroding rebar.
Remove and clean
We break out unsound concrete back to a solid substrate and clean the exposed rebar to a sound condition.
Repassivate and rebuild
We treat the steel to repassivate it, then rebuild the lost concrete profile with a cold-applied repair mortar.
Line against immersion
We apply a lining over the rebuilt surfaces to make them watertight and resistant to chemical and microbial attack.
Return to service
We confirm the rebuilt and lined surfaces are sound and ready for the structure to go back into immersion service.
The result
From the job
Repair and protection work of this kind, performed by AAS crews across Louisiana.
Capabilities used here
Where this work happens
Other projects
Storage Tank Floor Reclamation
Corroded aboveground tank floor rebuilt and lined back to immersion service without cutting out plate.
View project
Centrifugal Pump Rebuild & Efficiency Restoration
Cold-rebuilding an eroded pump casing and lining it to restore clearances, no new casting required.
View project
Live Pipe Leak Seal & Composite Wrap
Live leak sealed and a degraded process line reinforced with an engineered composite wrap, no welding and often no shutdown.
View project
Heat Exchanger Water Box Protection
Blasting, metal rebuild, and a barrier coating restore a corroded exchanger water box and tube sheet in cooling-water service.
View project
Chute & Hopper Erosion Lining
Worn chutes, hoppers, and slurry pumps rebuilt and lined with impact- or abrasion-resistant systems matched to the wear.
View projectHave equipment that needs to stay in service?
Tell us what is failing. We respond quickly, and we offer 24-hour on-call service.