Electrical Methods for Evaluating Mass Transport Properties of Concrete-Toward Performance Specifications for Concrete Durability Using the Formation Factor (Recorded Presentation)

Toward Performance Specifications for Concrete Durability Using the Formation Factor (Recorded Presentation)

Video Transcription

Video Summary

The speaker presented a discussion on performance specifications in concrete testing, focusing on the formation factor's importance. They highlighted issues impacting testing accuracy, such as sample leaching, temperature, and moisture content, emphasizing the need for precise measurement specifications. The formation factor, a crucial aspect of concrete performance, measures porosity and pore connectivity, impacting ion transport. A method to calculate this using resistivity was discussed, challenging the reliability of traditional RCPT tests affected by pore solution conductivities. The speaker explained that porosity alone doesn't capture structural durability as well as the tortuosity factor does, which Accounts for pore path complexity. Different testing techniques, including pore solution extraction and XRF analysis, were introduced. The speaker highlighted the approach's predictive capability, recommending it for improved specifications and lifespan predictions. Overall, this method positions itself as a valuable tool in enhancing concrete testing accuracy and building longevity predictions.

Keywords

concrete testing

formation factor

performance specifications

porosity

tortuosity factor

resistivity method