Title:
Use of Blast Furnace Slag as Mining Fill
Author(s):
J. Metso, S. Makinen,
and E. Kajaus
Publication:
Symposium Paper
Volume:
79
Issue:
Appears on pages(s):
1111-1122
Keywords:
backfilling: binders (materials);
blended cements; compressive strength; mines
portland cements.
blast furnace slag;
(excavations);
DOI:
10.14359/6742
Date:
5/1/1983
Abstract:
The investigation was carried out by using different amounts of blast furnace slag in blended cements. The slag content of the binder varied from 0 % to 100 % of the weight of the cement. The cement-aggregate ratio in the experiments was 1:15 and the water-cement + slag ratio was 5.9. The compressive strength of the mining-fill-concrete was determined at the age of 28, 91 and 182 days. The specimens were cured at both +8 OC and a t +20 oC. The optimum cement content in the binder when granulated slag was used, was 10 % at both temperatures. Using pelletized slag, the optimum cement content in binding agent was, at +8 oC, 30 %, and at +20 oC, 10 % of the weight of blended cement. At lower temperatures the finer slag gave higher compressive strength results while at the temperature of 20 ‘C no increase in compressive strength was observed.