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Crack Self-Healing Performance According to Absorption Test of Fiber Reinforced Concrete

콘크리트의 흡수율에 따른 균열 자기치유 성능

Woo, Hae Sik;Park, Byoung Sun;Yoo, Sung Won;Choi, Young Cheol
우해식;박병선;유성원;최영철

  • Received : 2019.01.23
  • Accepted : 2019.02.27
  • Published : 2019.03.01

Abstract

Cracks in concrete structures are inevitable phenomena caused by shrinkage, hydration heat, and external loads. These cracks facilitate the penetration of external harmful ions into the concrete, which greatly reduces its durability. Recently, self-healing concrete has been actively studied. Also, self-healing fiber-reinforced concrete have been studied to control the crack in concrete and to maximize the shelf-healing capability. In this study, mortar specimens containing PVA fiber, fly ash and crystalline admixture were fabricated. The compressive and flexural strength were evaluated. Also, the self-healing performance was evaluated by the absorption test. From the results, it was confirmed that the amount of water absorbed by healing of the crack decreased as time increased. It was also found that PVA fiber is beneficial for the production of calcium carbonate, an additional healing product.

Keywords

Polyvinylalcohol fiber;Self-helaing;Absorption test;Fly-ash

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)