鋼繊維が鋼繊維補強コンクリートのひび割れ部における鉄筋腐食に及ぼす影響に関する基礎的研究

抄録

Experimental studies were conducted to clarify mechanisms of corrosion inhibition of rebar by steel fibers in steel fiber reinforced concrete, SFRC. Test specimens with an artificial crack were made from concrete and SFRC, and steel fibers were arranged in the crack for some of concrete specimens. Specimens were exposure under wet-dry cycle and salt water were poured through the artificial crack when wet condition. After prescribed cycles, rebar corrosion was evaluated and impacts of steel fibers on that were discussed. As the results, it was confirmed that steel fibers inhibited the rebar corrosion, and its effect was appeared when fibers existed in the artificial crack mostly. The corrosion inhibition was shown for large crack specimens as well as small crack ones. An electrochemical factor due to corrosion of steel fibers themselves was supposed as main mechanisms of corrosion inhibition from the experimental results.