リニューアル(6)

[VI-716] Diffusion of a Nitrous Acid Ion in the Concrete

〇JIN SAITO¹, SHIGEAKI OKA¹, KATSUHARU SATO², TAKAYUKI NAKAGAWA⁶, JINSEI SHIKI⁶, NOBUNORI TAKEDA³, SHIGEYUKI SOGO⁴, TAKESHI TOKUNO⁵ (1.Tokyo Electric Power Company Holdings, 2.Tokyo Electric Power Company Power Grid, 3.Hiroshima Institute of Technology, 4.Near Future Concrete Association, 5.Japan Concrete Maintenance Association, 6.Tokyo Electric Power Services)

Keywords:Nitrous Acid Ion, Diffusion, Diffusion Coefficient, Preventive Maintenance, Surface Impregnation

Of the surface impregnation materials used as a countermeasure against salt damage to reinforced concrete, few examples have quantitatively evaluated the diffusion phenomenon of nitrite ions. For this reason, the timing and amount of application of the surface impregnation material are not clear. Therefore, the diffusion phenomena of nitrite ion were confirmed using various specimens, and finally the magnitude of the diffusion coefficient was considered.