2011 Volume 65 Issue 1 Pages 406-412
In this study,the frost resistance of concrete applied blast-furnace slag fine aggregate is examined by considering the effect of the decrease in bleeding and an antifoaming agent. The obtained experimental results are as follows：
1）The frost resistance of blast furnace slag（BFS）concrete decreases, but this decrease is not affected by the air content or spacing factor of the BFS concrete.
2）The frost resistance of concrete decreases as the replacement ratio of BFS increases, and the frost resistance decreases remarkably when BFS is used with an antifoaming agent.
3）The increase in the bleeding because of the use of BFS can be controlled by increasing the number of fine particles of BFS；however, the effect of increasing the amount of fine particles of BFS on the frost resistance of concrete was insignificant.
4）The amount of decrease of individual sides of concrete estimated on the basis of the reading of gross checker showed various characteristics according to the variety of materials and admixtures.
5）There are many voids inside BFS grain, and they occupy 2.7% of total volume of BFS concrete, and 1.3% of the voids are open to paste parts.
6）The number of small BFS grains appears to decrease by freezing and thawing test, but the methodology of the test should be examined for a definite evaluation of the frost resistance of BFS.
