基于热裂纹演化的玻化微珠保温混凝土渗透性能分析. / Li, Ming-hou; Selyutina, Nina; Smirnov, Ivan; Zhang, Xiang; Li, Beibei; Liu, Yuanzhen; Zhang, Yu.
In: Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science), Vol. 57, No. 2, 01.02.2023, p. 367-379.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - 基于热裂纹演化的玻化微珠保温混凝土渗透性能分析
AU - Li, Ming-hou
AU - Selyutina, Nina
AU - Smirnov, Ivan
AU - Zhang, Xiang
AU - Li, Beibei
AU - Liu, Yuanzhen
AU - Zhang, Yu
PY - 2023/2/1
Y1 - 2023/2/1
N2 - The high thermal stability of glazed hollow bead (GHB) was used to improve the high temperature resistance of concrete, in order to improve the durability degradation of concrete structures after fire. The anti-chloride ion penetration of glazed hollow beads insulation concrete (GIC) exposed to high temperature was tested through the electric flux method. Meanwhile, combined with the thermal crack evolution characteristics, the deterioration law of its resistance to chloride ion corrosion was analyzed. Results showed that the application of GHB significantly improved the degradation of the chloride ion penetration resistance of concrete after high temperature exposure. Compared with normal concrete (NC) and silica fume concrete (SFC) of the same strength grade, the electric flux of concrete with GHB after high temperature exposure was reduced by about 54.15% and 32.69%, respectively. Combined with the thermal cracks evolution characteristic of concrete, it was believed that this was attributed to the strengthening effect of GHB and silica fume on the compactness of concrete, and the positive contribution of GHB to thermal damage resistance of concrete. On this basis, the influences of thermal crack evolution, GHB and silica fume, were further considered, and a prediction model of chloride ion permeability in high temperature environment was finally established.
AB - The high thermal stability of glazed hollow bead (GHB) was used to improve the high temperature resistance of concrete, in order to improve the durability degradation of concrete structures after fire. The anti-chloride ion penetration of glazed hollow beads insulation concrete (GIC) exposed to high temperature was tested through the electric flux method. Meanwhile, combined with the thermal crack evolution characteristics, the deterioration law of its resistance to chloride ion corrosion was analyzed. Results showed that the application of GHB significantly improved the degradation of the chloride ion penetration resistance of concrete after high temperature exposure. Compared with normal concrete (NC) and silica fume concrete (SFC) of the same strength grade, the electric flux of concrete with GHB after high temperature exposure was reduced by about 54.15% and 32.69%, respectively. Combined with the thermal cracks evolution characteristic of concrete, it was believed that this was attributed to the strengthening effect of GHB and silica fume on the compactness of concrete, and the positive contribution of GHB to thermal damage resistance of concrete. On this basis, the influences of thermal crack evolution, GHB and silica fume, were further considered, and a prediction model of chloride ion permeability in high temperature environment was finally established.
KW - chloride ion corrosion
KW - concrete
KW - glazed hollow bead
KW - predictive model
KW - thermal crack
UR - https://www.mendeley.com/catalogue/65669381-7554-3eca-81e5-cd622037c3cf/
U2 - 10.3785/j.issn.1008-973X.2023.02.016
DO - 10.3785/j.issn.1008-973X.2023.02.016
M3 - статья
VL - 57
SP - 367
EP - 379
JO - Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science)
JF - Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science)
SN - 1008-973X
IS - 2
ER -
ID: 114419830