Title:
Resistance of Concrete Structures to Ozone Penetration
Author(s):
Larry G. Mrazek
Publication:
Concrete International
Volume:
3
Issue:
4
Appears on pages(s):
69-74
Keywords:
corrosion; corrosion resistance; corrosion tests; cracking (fracturing); crack width and spacing; galvanic corrosion; gas analysis; permeability; reinforcing steels; tests; wastewater treatment.
DOI:
Date:
4/1/1981
Abstract:
Ozone is presently used as a disinfecting agent in both water and wastewater treatment plants and is also used to treat odors in industrial and municipal facilities. Since ozone is an active oxidizing agent, the or initiated an extensive investigation and testing program to determine what, if any, detrimental effects the vaporous gas would have on concrete and reinforcing steel. The results of these investigations and subsequent recommendations should be of interest to consulting engineers, municipal engineers, and governmental agencies. Investigations included the following: use of special coatings, membranes, and linings; post-tensioning for crack control; special concrete practices emphasizing crack control; galvanized reinforcing; and tests of concrete specimens in 3 percent ozone atmosphere for about 1 year. Based on the results of these investigations, the author recommends: use of special concrete practices to control cracking and crack widths; minimize expansion joints but employ control joints; and use of galvanized reinforcing above liquid level.