Self-healing concrete aggregate containing waste sts electric reduction slag, manufacturing method thereof and self-healing concrete using the same

The present invention relates to a fine aggregate for self-healing concrete using STS electric furnace reduced slag, a method for producing the fine aggregate, and a self-healing concrete using the same. The fine aggregate for self-healing concrete using the STS electric furnace reduced slag of the present invention is characterized in that when the STS electric furnace reduced slag is used as a substitute for cement, the STS electric furnace reduced slag has a spherical particle shape It is made of fine aggregate for self-healing concrete. It can be used for self-healing of cracks in the air (state of air) by reacting with carbon dioxide (CO 2 ) in the air by breaking the fine aggregate at the time of cracking without affecting the strength development. The present invention relates to a fine aggregate for self-healing concrete using reduced slag, a method for producing the same, and a self-healing concrete using the same.