Impact of Chemical Deicers-Effectiveness of Early Application of Penetrating Sealants (Recorded presentation)

Effectiveness of Early Application of Penetrating Sealants (Recorded presentation)

Video Transcription

Video Summary

The speaker addresses the issue of surface defects in concrete, particularly in residential settings, and highlights an unexpectedly high number of callbacks due to these defects in Minnesota. To tackle this problem, the Minnesota Concrete Council initiated a comprehensive study focusing on using sealers to resist freezing and thawing. The study involved both laboratory and field tests, varying factors like curing time, sealer types, and de-icer exposure. In the lab, they tested different conditions for scaling using a factorial approach. The field study involved a large-scale driveway placement to mirror lab tests, varying curing time and sealer application. The findings indicated that longer curing times and the use of certain sealers like siloxane significantly reduced scaling. Unexpectedly, despite severe weather causing callbacks in the past, the field study recorded minimal scaling and pop-outs, highlighting the influence of moisture levels on concrete defects.

Keywords

concrete defects

Minnesota Concrete Council

sealers

curing time

scaling reduction