Abstract
Scarcity of natural concrete aggregate is one of the common problems that concrete engineers are facing today. This paper presents the results of a study on a new manufacturing machine of artificial concrete aggregate which excels in grain shape and grading. In the crusher, raw stones are crushed by many chains rotating around a center rod. The number of the rotations is monitored and the mass of raw stones crushed every one minute is changed as experimental factors. A distance between a tip of the chain and an inner wall of the crusher is also changed. Finally, a total of 27 specimens are made and tested. The results show that the crusher can produce fine aggregate with excellent grain shape.
