Title: PHYSICAL RESPONSES TO THE INTERACTION OF DEICER AND NATURAL MICROFINES

Author(s): Jessica M. S. Silva, Steven M. Cramer, Marc A. Anderson, M. Isabel Tejedor, and Jose F. Muñoz

Publication: Materials Journal

Volume: 111

Issue: 4

Appears on pages(s): 363-372

Keywords: alkali-silica reaction (ASR); concrete durability; deicer; expansion; freezing-and-thawing durability; microfines.

DOI: 10.14359/51686806

Date: 7/1/2014

Abstract:
The interactions of natural microfines and potassium acetate deicer were investigated in laboratory specimens. Microfines (mate¬rial smaller than 75 µm [0.003 in.]) from five aggregate sources from locations across the western United States were character¬ized and subsequently studied when subjected to deicer solution while in concrete. Expansion and freezing-and-thawing durability test specimens were monitored and evaluated for damage. Based on the incurred failures and mineralogy type, the microfines were assessed. Among the microfines tested, those incorporating phyl¬losilicates showed the greatest degradation of concrete when subjected to potassium acetate deicer over the duration of the study.