Title:
A Practical Guide to Life, Liberty, and the Pursuit of Concrete Durability (Sulfate Attack and DEF in Particular)
Author(s):
Hooton
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/17/2021
Abstract:
I have worked together with Michael on several durability projects, but this presentation will focus on two of them. (1) Through joint supervision of the PhD of Terry Ramlochan, it was found that sufficient levels of SCMs eliminated the risk of expansion due to delayed ettringite formation (DEF) after early-age exposure to high-temperatures. The role of alumina in the SCMs was key to providing DEF mitigation. (2) Starting in 2009, through the PhDs of Ashlee Hossack and Reza Ahani, we developed complementary laboratory and outdoor underground (low temperature) exposure sites to determine the sulfate resistance of concretes containing portland-limestone cements. The on-going long-term exposure site data has shown that there is no negative impact of PLC on sulfate resistance and that PLC concretes mitigated with SCMs are more resistant to sulfate attack than sulfate-resistant portland cement concretes.