Title:
Alkali-aggregate Reactivity of Ferronickel-Slag Aggregate Concrete
Author(s):
F. Tomosawa, S. Nagataki, T. Kajiwara
and M. Yokoyama
Publication:
Symposium Paper
Volume:
170
Issue:
Appears on pages(s):
1591-1602
Keywords:
Alkali-aggregate reactions; blast furnace slag; fine aggregates; fly ash;
slags.
DOI:
10.14359/6893
Date:
7/1/1997
Abstract:
Ferronickel slag is a by-product produced when refining ferronickel from nickel ores. Investigations were conducted for a long time to use this hard slag as aggregate in concrete, and it was standardized in October 1992 as JIS A 5011 (Slag aggregate for concrete). However, one of the types produced in Japan was excluded from the standard, as it was alkali-aggregate reactive. The authors applied various measures specified in other standards to suppress reactivity of this type of ferronickel-slag aggregate, and experimentally confirmed that the following measures are effective: (i) the use of low-alkali cement, (ii) addition of fly ash, and (iii) addition of ground granulated blast-furnace slag.