Method for judging water-swelling expansion of steel slag and method for producing slag roadbed material

摘要

PROBLEM TO BE SOLVED: To provide a water immersion expansion determination method of a steel making slag capable of logically assuring, in a short time, the quality to the water immersion expansion for a long term.SOLUTION: In a water immersion expansion determination method of a steel making slag, an increase magnification of the water immersion expansion rate increasing per unit temperature from a water immersion expansion curve of a plurality of steel making slags water-immersion-expanded at different temperatures from 40°C to 120°C is calculated. Then, with reference to a water immersion expansion reference value of the steel making slags water-immersion-expanded at a prescribed temperature for a prescribed time, a conversion time corresponding to the prescribed time at the measured temperature is calculated using a temperature difference with a measured temperature that is higher than the prescribed temperature and the increase magnification. Then, the acceptance of the steel making slags for the water immersion expansion reference value is determined using the water immersion expansion value of the steel making slags water-immersion-expanded at the measured temperature for the conversion time.SELECTED DRAWING: Figure 4