This paper deals with a new manufacturing machine of fine concrete aggregate which excels in grain shape and grading. In this paper, we report the experimental results of concrete aggregate made by the kinetic energy of many chains which rotate at high speed in the presented stone crusher. We carried out many crushing experiments using some raw stones, then examined the grain shape and grading of the produced concrete aggregates. As experimental factors, we changed the size, rotating speed, combination, and number of chains. We also considered the influence of the number of the crushing and the mixed raw stones. Consequently, it became clear that the presented stone crusher can produce the concrete aggregate with excellent grain shape.
