Title:
Benchmarking Concretes with Pozzolanic Materials in Terms of Rapid Chloride Penetration Test
Author(s):
U. Anil Dogan, E. Bora Kurt, A. Gorkem Saran, and M. Hulusi Ozkul
Publication:
Materials Journal
Volume:
106
Issue:
3
Appears on pages(s):
251-257
Keywords:
curing; fly ash; rapid chloride penetration test; silica fume; slag; statistical analysis.
DOI:
10.14359/56549
Date:
5/1/2009
Abstract:
Three pozzolanic materials - fly ash, granulated blast-furnace slag, and silica fume (both in densified and undensified forms) - have been used as additives in the production of concrete. Rapid chloride penetration test (RCPT) was applied over the air-stored and water-cured specimens at the age of 90 days. The values of chosen variables - binder content, pozzolanic material content, and water-binder ratio (w/b) - were determined by using a statistical experimental design method. For each type of pozzolan used, 20 concrete mixtures were prepared, and a total of 80 mixtures were tested under each curing condition. By using the same statistical software used in design, it was found that pozzolanic material content was more significant than w/b on chloride permeability, particularly for water-cured concretes. Furthermore, the optimum amounts of pozzolans obtained for air-cured concretes were increased to higher levels when efficient curing was applied.