#40 Durability Issues in Concrete | Part 2 | Advanced Concrete Technology

Welcome to 'Advanced Concrete Technology' course ! This lecture continues the discussion on durability issues in concrete, focusing on migration and its impact on concrete performance. We'll revisit the rapid chloride permeability test (RCPT), emphasizing its qualitative nature and limitations in predicting service life. We'll introduce the four-probe resistivity test as a non-destructive method for assessing concrete resistivity and discuss its application in durability assessments. The lecture will further explore the concept of migration coefficient and its relevance in understanding non-steady-state migration processes. We'll examine the use of vacuum saturation techniques for accelerating migration tests and discuss how silver nitrate spraying reveals the depth of chloride penetration. The lecture will also touch upon durability specifications adopted by organizations like the South African National Roads Agency, highlighting the use of mock-up panels and a combination of tests for evaluating concrete durability. NPTEL Courses permit certifications that can be used for Course Credits in Indian Universities as per the UGC and AICTE notifications. To understand various certification options for this course, please visit https://nptel.ac.in/courses/105106176 #Migration #Resistivity #Conductivity #RapidChloridePermeabilityTest #RCPT #QualitativeParameters #FourProbeResistivityTest #NonDestructiveTesting #ASTM #MigrationCoefficient #NonSteadyStateMigration #VacuumSaturation #SilverNitrate #DepthOfChloridePenetration #SouthAfricanNationalRoadsAgency #DurabilitySpecifications #MockUpPanels #ChlorideConductivity #OxygenPermeabilityIndex #WaterAbsorption #ServiceLifeModels