Title:
Sulfate Resistance of Mortars and Concretes With Calciferous Aggregates
Author(s):
W. G. Piasta
Publication:
Symposium Paper
Volume:
100
Issue:
Appears on pages(s):
2153-2170
Keywords:
aggregates; coarse aggregates; concrete durability; fly ash; granite; limestone; mortars (material); sulfate resistance; Materials Research
DOI:
10.14359/2349
Date:
4/1/1987
Abstract:
This investigation was carried out in order to explain the effect of the kind of aggregate on sulfate resistance of concretes and mortars. The objects of the studies were concretes with the following crushed coarse (2 to 20 mm) aggregates: porous limestone (porosity 36 percent), dense limestone (porosity 5.5 percent), and granite and mortars with the same calciferous aggregates (0 to 2 mm) and quartz sand (0 to 2 mm). It has been stated on the basis of the results of investigation that the sulfate resistance of concretes was different according to the aggregate used. However, the durability of concrete with the porous calciferous aggregate has been much better than expected in spite of its very high porosity of 36 percent. It has also been discovered that the mortars with the porous aggregate have been of higher resistance than the concretes made of that aggregate. Generally, a higher resistance of cement with fly ash replacement has been found than that of ordinary portland cement.