Mechanical Properties of Short Fiber Reinforced and Fly Ash Mixed Concrete under ASR Environment
ASR is one of the deterioration factors of concrete structures.In recent years, even in the case of structures which had been constructed with taking measures for ASR, ASR deterioration has still been reported.It is difficult to say that the ASR countermeasure applied so far is not always sufficient.Therefore, in this experimental research, we focused on reinforcement by mixing fibers as an effective method to reduce the cracking of concrete.Three kinds of fibers were used with different shapes, strengths and materials in the experiment.Plain concrete and fly ash mixed concrete were also made for comparison.The specimens were soaked in sodium hydroxide solution and compared their expansion coefficients.As a result, it was observed that fly ash has a stable effect on mitigating ASR expansion, but the effect depends on environmental temperature.The fiber reinforcement mitigates the expansion more effectively than using fly ash.However, the effect depends on the shaper, surface profile and material strength of fiber.
alkali silica reaction short fiber reinforced concrete fly ash expansion ratio
Koji Shinagawa Ryuhei Sokugawa Hiroshi Yokota
Graduate School of Engineering, Hokkaido University, Japan Faculty of Engineering, Hokkaido University, Japan
国际会议
福州
英文
669-674
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）