#41 Durability Issues in Concrete | Part 3 | Advanced Concrete Technology

Welcome to 'Advanced Concrete Technology' course ! This lecture focuses on sulphate attack, a major durability concern in concrete. We'll examine the mechanisms behind sulphate attack, including ettringite formation and its impact on concrete expansion. The lecture will discuss the influence of pH levels on ettringite stability and explore the differences between primary and secondary ettringite formation. We'll delve into laboratory studies using mortar prismatic specimens and analyze the relationship between ettringite content and concrete expansion. The lecture will also cover different methods for protecting concrete against sulphate attack, such as using sulphate resisting cement and reducing C3A content. Finally, we'll emphasize the importance of concrete permeability in determining its resistance to sulphate attack. 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 #SulphateAttack #EttringiteFormation #DelayedEttringiteFormation #DEF #SecondaryEttringiteFormation #CrystallineMaterial #Expansion #pHLevels #StabilityOfEttringite #MortarPrismaticSpecimens #LengthComparator #DynamicModulus #ASTM #XRayDiffraction #CrystallinePhases #ImmersionStudy #Shrinkage #DryingAndWetting #ProtectionAgainstSulphateAttack #SulphateResistingCement #C3A #Permeability