Carpi provides rehabilitation solutions for masonry dams where deteriorated joints in the masonry can create critical paths for water infiltration. SIBELON® geomembrane systems provide a durable waterproof barrier across the affected areas, preventing leakage, protecting the joint sealant from further deterioration, and reducing the need for frequent maintenance, which is on the contrary typical of local repairs .  Anti-puncture geotextiles are used on very aggressive sharp masonry as a cushion to the geomembrane and to minimise surface preparation. 

In RCC dams, thermal cracking, defective contraction joints, and permeable lift joints are the main source of leakage that may result in increased uplift pressures and reduced stability, and may accelerate deterioration of the dam. Carpi rehabilitates RCC dams using exposed drained SIBELON® geomembrane systems to restore watertightness across the upstream face. The system bridges cracks, contraction joints and lift joints while accommodating structural movements, seismic events, and protecting the dam from deterioration. Waterproofing can be limited to critical sections, or to treat failing joints or cracks only.

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Carpi develops rehabilitation solutions for embankment dams where  differential settlements, localised deterioration at the connections between the embankment and the appurtenant concrete structures , or  ageing and overstressing of the upstream facing, can create paths for water infiltration. SIBELON® geomembrane systems restore watertightness and provide reliable seepage control, resisting large settlements and seismic events, reducing/preventing formation of uplift pressures, preventing internal erosion and piping or avoiding migration of fines in the core. Exposed or covered configurations are selected according to the existing structure and project requirements, across the full upstream face, or on critical sections, or to treat specific connections. The anchorage systems are designed in function of the subgrade’s characteristics. 

SIBELON® geomembrane rehabilitation solutions for CFRDs address deterioration and leakage affecting the upstream concrete slabs and joints. On concrete facings, anchorage systems are generally like those used in concrete dams. Anti-puncture geotextiles, geogrids, technical woven geotextiles, may be needed on heavily deteriorated facings or at large cavities/discontinuities, to minimise surface preparation or to avoid the geomembrane collapsing into the cavities under the water pressure.  

SIBELON® geomembrane solutions for ACFRDs restore watertightness where the existing upstream facing or its connections to concrete appurtenances are deteriorated or failing. The susceptibility of such facings to climate aggression and temperature variations, and their plastic nature, result in a subgrade often irregular and with varying characteristics, requiring an anchorage system designed in function of pull-out resistance.