UTILIZATION OF STAINLESS-STEEL SLAG BY CEMENT HARDENING

Abstract

The utilization of wastes as construction material is one of the most desirable strategies to solve environmental problems caused by the generation of wastes. There are only a few researches that have discussed the utilization of slag derived from stainless-steel industry. Stainless-steel slag, which is simply disposed of, is one kind of electric furnace slags which exhibit the expansion phenomenon associated with water absorption. The objective of this study is to illustrate the effective utilization of stainless-steel slag as ground materials by solidification. Strength and durability characteristics of stainless-steel slag hardened by stabilizers were investigated experimentally. It has been shown that the Carbonated-Aluminate Salts can be used effectively in stabilizing this slag. The addition of kaolin clay as a pre-mixed admixture to raw materials improves the hardening effect considerably and the durability of materials, and the durability characteristic of stabilized mixtures depends on the curing condition, especially drying method. It is recommended that the hardened stainless-steel slag examined in this study can be applied as road (subbase course) materials.