Title:
Sulfate Resistance of a Canadian Slag Cement
Author(s):
R. Doug Hooton and John J. Emery
Publication:
Materials Journal
Volume:
87
Issue:
6
Appears on pages(s):
547-555
Keywords:
accelerated tests; blast furnace slag; concrete durability; long-time study; mortars (materials); portland cements; sulfate resistance; portland slag cements; slags; Materials Research
DOI:
10.14359/2501
Date:
11/1/1990
Abstract:
Tests to evaluate the sulfate resistance of concrete made with portland cement partially replaced by a separately ground, pelletized slag from Hamilton, Ontario, were initiated in 1977. Over 1000 cylinders were cast from eight concrete mixes made with normal, moderate, and sulfate-resisting cements, and 45, 65, and 72 percent slag replacement. These were exposed to water and different strengths of sulfate solutions, ranging from 1000 to 3000 mg/l SO4 for 8 yr, after which some were exposed to accelerated 50,000 mg/l SO4 solutions. The tests were augmented by a large, two-part series of more than 23 different mortar mixes using a method similar to the standardized ASTM C 1012 procedure. These mortar bars were exposed to deionized water and various sulfate solutions ranging from 3000 to 50,000 mg/l. Variables included C3A content of portland cements, slag replacement level, alumina content of slag, sulfate salt type, and compressive strength at first exposure.