Degradation of permeability resistance of high strength concrete after combustion |
| |
Authors: | Min Li Hongtao Kao and Chunxiang Qian |
| |
Affiliation: | (1) Department of Materials Science and Engineering, Southeast University, Nanjing, 210096, China;(2) Nanjing University of Technology, Nanjing, 210009, China |
| |
Abstract: | To evaluate the remaining durability of concrete materials after combustion, the permeability of high strength concrete (HSC)
after combustion was studied. The transport behavior of chloride ion, water and air in concrete after combustion and the effect
of temperature, strength grade, and aggregation on the permeability of HSC after combustion are investigated by chloride ion
permeability coefficient (D
c), water permeability coefficient (D
w) and air permeability coefficient (D
a). The experiment results show that all three permeability coefficients commendably reflect changes of permeability. The permeability
coefficient increases with the evaluation temperature. After the same temperature, the permeability coefficient of HSC is
lower than that of normal strength concrete (NSC). However, the degree of degradation of permeability coefficient of HSC is
greater than that of NSC. The permeability resistance of HSC containing limestone is better than that of HSC containing basalt.
Combining changes of compressive strength and permeability, the remaining durability of concrete materials after combustion
is appropriately evaluated.
__________
Translated from Journal of Southeast University (Natural Science Edition), 2006, 36(5): 825–830 译自: 东南大学学报(自然科学版)] |
| |
Keywords: | high strength concrete combustion chloride ion permeability coefficient water permeability coefficient air permeability coefficient |
本文献已被 万方数据 SpringerLink 等数据库收录! |
|