Abstract
The effects of ball milling processes on specific surface area, particle size distribution, and compressive strength at different curing ages of one-part alkali-activated nickel slag mortar (AASBM) were investigated. Results show that the influence of impact efficiency on nickel slag from mechanical and chemical interaction differs with ball milling process. Reducing ball loading rate and increasing ball material ratio has the highest energy efficiency for improving specific surface area and improving the strength of 28 d of AASBM, respectively. With the extension of ball milling time, the specific surface area of cement can be improved but the strength increase amplitude of the mortar will decrease accordingly. When the ball loading rate is 30%, the ball material ratio is 15, and the undisturbed nickel slag is milled with high speed for 2 h then mixed with solid alkali, the compressive strength of AASBM is optimal.
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