Download - Concrete Repair Method
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By DennisBy Dennis ChoiChoi
Concrete Repair MethodConcrete Repair MethodConcrete Repair Method
NoteNote::
The information used in thisThe information used in thispowerpointpowerpoint is extracted from HKCRA and ICRIis extracted from HKCRA and ICRI
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Concrete Repair ProcedureConcrete Repair ProcedureConcrete Repair Procedure
Part 1Part 1 -- Concrete EvaluationConcrete Evaluation
Part 2Part 2 -- Concrete Repair MethodConcrete Repair Method
Part 3Part 3 -- Quality ControlQuality Control
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Part 1 -Part 1Part 1 Concrete Evaluation-- Concrete EvaluationConcrete EvaluationDepends on complexity and size of the jobDepends on complexity and size of the job
Before Repair WorksBefore Repair Works
zz (Open Up) Visual or(Open Up) Visual RITS (Rapid Infraredor RITS (Rapid Infrared ThermographicThermographic Survey)Survey)
andand delaminationdelamination Survey (Hammer Tapping)Survey (Hammer Tapping)
zzCovermeterCovermeterSurveySurvey -- in according with BS4408 Part 1in according with BS4408 Part 1
zzCarbonation Depth MeasurementCarbonation Depth Measurement
PH of concrete 12.5PH of concrete 12.513.5 drop to 11 or below.13.5 drop to 11 or below.
Carbonation coefficient by application ofCarbonation coefficient by application ofFickFickss LawLaw
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Part 1 - Concrete EvaluationPart 1Part 1 -- Concrete EvaluationConcrete Evaluation
Before Repair WorksBefore Repair Works
zzElectrochemical Potential (Half Cell)Electrochemical Potential (Half Cell)
--Measurement in accordance with ASTM C876Measurement in accordance with ASTM C876--8080
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Part 1 - Concrete EvaluationPart 1Part 1 -- Concrete EvaluationConcrete Evaluation
Before Repair WorksBefore Repair Works
zzConcreteConcrete ResistivityResistivity MeasurementMeasurement
zz
Chloride Content DeterminationChloride Content Determination
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Part 1 -Part 1Part 1 Concrete Evaluation-- Concrete EvaluationConcrete EvaluationAfterAfter Repair Works (Q/C)Repair Works (Q/C)
z RITS
z Covermeter Survey
z Rebound Hammer
z Bond Test ( Direct pull-off)
z Others Similar to the Before Repair Works
(for comparison the result)
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- Concrete Repair MethodPart 2Part 2Part 2 -- Concrete Repair MethodConcrete Repair Method
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Surface Repair MethodSurface Repair Method
Patching Method /Grouting Method Spray Method
Patching MethodPatching Method //Grouting MethodGrouting Method Spray MethodSpray Method FullFull--Depth Replacement MethodDepth Replacement Method
Concrete Recasting Method
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Part 2Part 2 -- Concrete Repair MethodConcrete Repair Method
Extracted from the ICRI Concrete Repair Manual,
emphasis the following items
zz General description ( limitaGeneral description ( limitatition of different methods)on of different methods)
zz Best application conditionBest application condition
zz MateriMaterial selection requirement (al selection requirement ( available of different materialavailable of different material inin local market)local market)
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Part 2Part 2 -- Concrete Repair MethodConcrete Repair Method
Other Consideration
zz Time ConstraiTime Constraintnt
zz
Serviceability requirement (upgrade/resume)Serviceability requirement (upgrade/resume)
zz Cost saving (value added)Cost saving (value added)
zz Efficiency of worksEfficiency of works
zz End resultEnd result -- durabilidurabilittyy, appearance, clients, appearance, clients satisfactionsatisfactionetc)etc)
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Case StudyCase StudyCase Study
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Concrete RepairConcrete Repair
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PatchingPatching
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Concrete RepairConcrete Repair
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PatchingPatching
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Form & Dry Packing MethodForm & Dry Packing Method
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Concrete RepairConcrete Repair --SpraySpray
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Concrete RepairConcrete Repair --SpraySpray
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Concrete RepairConcrete Repair --GroutingGrouting
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Concrete RepairConcrete Repair --GroutingGrouting