Lesson 1Quality control and testing of repairs (coring, pull-off tests, visual acceptance criteria, monitoring)Dis part deal wid quality control fi underwater repairs, includin checks before placin, coring, pull-off tests, visual acceptance, an long-term watchin, wid ways fi record results an fix problems.
Preplacement inspections and checklistsSampling, coring and compressive testingPull‑off and bond tests on repaired areasVisual acceptance criteria for divers and QA staffPost‑repair monitoring and performance trackingLesson 2Mechanisms of concrete deterioration in marine environments (chloride attack, carbonation, freeze-thaw, abrasion)Dis part look at how sea water damage concrete, coverin chloride comin in, carbonation, freeze-thaw, abrasion, an chemical attack, linkin dem to common underwater problems an repair choices.
Chloride penetration and reinforcement corrosionCarbonation effects in tidal and splash zonesFreeze‑thaw and scaling in cold marine watersAbrasion and impact from ice, debris and vesselsChemical and biological attack on concreteLesson 3Tools and diver equipment specific to concrete work (underwater mixers, grout pumps, tremie hoses, underwater vibrators)Dis part detail tools an diver gear fi underwater concrete work, like mixers, grout pumps, tremie hoses, vibrators, an support gear, stressin safe handlin, upkeep, an quick setup from di surface.
Underwater and deck‑mounted concrete mixersGrout pumps, hoses and pressure controlTremie hose handling and diver coordinationUnderwater vibrators and consolidation toolsPPE and support gear for concrete operationsLesson 4Assessment techniques for submerged concrete and exposed reinforcement (visual, sounding, chain drag, ultrasonic testing)Dis part show methods fi check submerged concrete an exposed steel, includin visual check, soundin, chain drag, ultrasonic testin, wid guidance pon mappin defects, recordin, an diver-tender talk.
Planning underwater inspection scopes and accessVisual inspection patterns and defect recordingSounding and chain drag for delamination detectionUltrasonic and pulse‑echo testing underwaterCondition rating and repair priority decisionsLesson 5Underwater repair materials: hydraulic repair mortars, cementitious grouts, anti-washout formulations, epoxy mortarsDis part review underwater repair materials like hydraulic mortars, cement grouts, anti-washout mixes, epoxy mortars, explainin pickin criteria, handlin, storage, an performance fi sea structures.
Hydraulic repair mortars for hand and form repairsCementitious grouts for voids and baseplatesAnti‑washout concrete and grout formulationsEpoxy mortars and bonding agents underwaterMaterial storage, mixing and pot life controlLesson 6Formwork and cofferdam options for underwater repair (removable formwork, prefabricated collars, inflatable dams)Dis part describe formwork an cofferdam fi underwater repair, like removable forms, prefab collars, inflatable dams, focusin pon pickin, installin, sealin, bracin, an safe drainin.
Criteria for selecting formwork or cofferdamsDesign of removable underwater formwork systemsPrefabricated collars for piles and columnsInflatable dams and temporary water exclusionSealing, bracing and controlled dewateringLesson 7Mixing, placement and curing of underwater cementitious materials (anti-washout admixtures, tremie and pumping techniques)Dis part cover mixin, placin, an curin underwater concrete an mortars, focusin pon anti-washout additives, tremie an pump methods, consolidatin, an curin fi strength an lastin underwater.
Proportioning underwater concrete and repair mortarsSelection and dosage of anti‑washout admixturesTremie pipe setup, positioning and operationUnderwater concrete pumping procedures and limitsCuring methods and protection in submerged conditionsLesson 8Surface preparation methods underwater (hydro-scarifying, scabbling, needle-gunning, abrasive water jetting, hand tools)Dis part explain how divers prepare submerged concrete fi bondin, coverin cleanin, hydro-scarifyin, scabblin, needle-gunnin, water jet abrasives, hand tools, stressin profile, clean, an safety.
Marine growth and contamination removal stepsHydro‑scarifying equipment and operating limitsScabbling and needle‑gunning techniques underwaterAbrasive water jetting setup and safety zonesHand tools for detailing edges and tight areas
