2019 Volume 73 Issue 1 Pages 355-362
Two kinds of metal grid （expanded type and square cut type） has been developed as an alternative reinforcement bar used for steel fiber reinforced concrete （SFRC） upper surface thickness increased method of RC slab. We proposed upper SFRC surface thickness increased method using 2 kind of metal grid in combination with adhesive. In this study, the proposed method evaluated the fatigue durability of RC slab by the fatigue test under running wheel load. As result, the proposed method was controlled an increase of deflection and improves fatigue durability. In addition, reinforcement method with joint structure in thickness layer was having equivalent strengthen effect as the reinforcement method without joint structure. The joint structure was not a structural weakness point in this experiment. The reinforcement method with joint structure was improved fatigue durability of RC slab. Therefore, SFRC upper surface thickening reinforcement method can be arranged Metal-Grid within a thickness of 60mm, which is a pratical reinforcement method.
