Advances in Test Methods to Evaluate Alkali-Aggregate Reactivity in Job Concrete Mixtures-Autoclave Methods for Detecting Alkali-Silica Reactivity Advantages and Limitations (Recorded presentation)

Autoclave Methods for Detecting Alkali-Silica Reactivity Advantages and Limitations (Recorded presentation)

Video Transcription

Video Summary

The presentation focuses on autoclave testing for Alkali-Silica Reaction (ASR) in concrete structures, particularly in identifying reactive aggregates. Existing test methods often use mortar specimens, which present challenges since aggregates can behave differently as fines and coarse parts. Two key test methods, by Fournier and Nishibayashi, have been pivotal. Giannini and Fournier developed the Autoclave Concrete Prism Test (ACPT) using concrete prisms in 2013. The research involves testing various aggregates for reactivity under varied conditions, measuring expansions, alkali leaching, and analyzing pore solutions to refine testing parameters and understand silica dissolution. The focus is on determining threshold values and optimizing conditions to assess aggregate reactivity effectively.

Keywords

autoclave testing

Alkali-Silica Reaction

reactive aggregates

concrete prism test

aggregate reactivity