Structural Dam Repair and Rehabilitation
                     Dam repair 
and 
rehabilitatio
Snpecialized dam repair and rehabilitation solutions for concrete 
restoration, crack repair, seepage 
control, grouting, waterproofing, and 
structural strengthening of critical 
infrastructure.
Dams carry water, power, flood, and industrial duties
Dams are critical infrastructure assets that support water storage, irrigation, 
hydroelectric power generation, flood management, and industrial water 
requirements.
1 Over time, continuous water pressure, weather exposure, concrete ageing, seepage, cracking, 
reinforcement corrosion, and construction-related deficiencies can affect their performance.
Concrete dams need regular technical 
attention
ENVIRONMENT EXPOSURE PROGRAMME
Concrete dams require regular Constant exposure to water, A planned dam rehabilitation 
technical attention because their hydraulic pressure, temperature approach helps identify 
operating environment is variations, chemical conditions, deterioration before it develops 
considerably different from and changing reservoir levels into a larger structural or 
ordinary concrete structures. can gradually affect concrete operational concern.
and embedded reinforcement.
Repair must address the deterioration 
mechanism
1 Mechanism of Action
Concrete deterioration can occur through water penetration, reinforcement corrosion, cracking, abrasion, 
chemical attack, freeze-thaw action in suitable climates, and long-term environmental exposure.
2 Surface vs Root Cause
The objective of rehabilitation is not simply to make the concrete surface look better.
3 Required Performance
It is to address the identified deterioration mechanism and restore the required performance of the 
affected component
Visible defects are symptoms, not 
diagnoses
Cracks can differ Spalling and Water passing 
in width, depth, damaged through cracks, 
orientation, concrete can construction 
movement, expose joints, 
location, and reinforcement contraction 
cause. to moisture and joints, porous 
aggressive concrete, or 
environmental other pathways 
conditions. can indicate a 
condition 
requiring 
investigation.
Condition assessment 
establishes the repair 
strategy
A successful dam rehabilitation project 
generally begins with a detailed condition 
asseEsngsimneeern1 s etx.amine visible cracking, concrete deterioration, 
seepage, leakage, joint conditions, reinforcement exposure, 
surface damage, previous repair areas, and other signs of 
distress.
2 Investigations may also include non-destructive testing, 
material evaluation, crack monitoring, reinforcement 
assessment, and examination of difficult-to-access 
locations.
Crack repair depends on crack 
behavior
Concrete dam crack repair requires a method suited to the characteristics of the crack and the 
surrounding concrete.
Repair Technical Description & 
Technique Suitability
Surface Direct barrier coat across hairline or non-moving crack 
sealing surface runs
Routing and V-groove chase cut along crack line filled with flexible or 
sealing elastomeric sealant
Epoxy Structural bonding for dry or dormant cracks to restore monolithic 
injection tensile strength
Polyurethane Hydrophobic or hydrophilic expansive resin to arrest active pressurized 
injection water ingress
Cementitious Microfine or standard cement grout packs for wide passive cracks and 
treatment deep mass voids
Seepage control follows the water 
pathway
Water may travel through cracks, joints, porous concrete, construction interfaces, or other discontinuities.
Injection grouting
Joint treatment 
Crack sealing 
Concrete 
restoration
Drainage-related 
measures
Grouting is effective 
when it is controlled
Depending on the engineering requirement, grouting may be used for crack 
treatment, void filling, seepage control, consolidation, or restoration of suitable 
interfaces.
Cement grouting, microfine cement grouting, epoxy injection grouting, and 
polyurethane grouting each have different characteristics.
Concrete restoration 
rebuilds the damaged 
section
1 Identify and remove unsound material while retaining sound 
concrete.
2 Assess reinforcement condition where 
exposed.
3 Treat affected reinforcement.
4 Rebuild the affected section using an appropriate repair 
material and application method.
Depending on the depth, location, geometry, and accessibility, 
concrete  repair may involve polymer-modified mortar, repair 
concrete, micro-concrete, sprayed repair systems, or other 
specified materials.
Thank 
Website:- https://gubbiciYvileongiuneers.com/concrete-dam-repair-
rehabilitation/