ACI 318-19 Changes to the Concrete Design Standard-Durability and Materials

Video Transcription

Video Summary

The recent updates to concrete durability and materials include significant changes in Chapters 19 and 26. Notable updates involve new requirements for concrete durability, such as recalculating chloride ion content and introducing new exposure classes like sulfate (S3) and water exposure (W). A new corrosion exposure class, C0, is also introduced. Materials updates include allowances for alternative cements and recycled aggregates, with specific acceptance criteria to ensure mechanical properties like strength and durability are met. Inspection protocols are stricter, emphasizing certified inspectors for processes like formwork and reinforcement. Updates also address strength testing protocols, requiring results from designated test windows and clarifying chloride limits to enhance corrosion resistance. The use of higher-grade concrete and reinforcement aims to improve seismic performance, with particular attention to structural walls. Additionally, recycled glass is now recognized for concrete mixtures, given proper documentation of its properties.

Keywords

concrete durability

exposure classes

alternative cements

recycled aggregates

corrosion resistance

seismic performance