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Issue:
Effect of pore structure on gas diffusion in fly ash concrete
Author(s):
LU Caifeng
,
YUAN Yingshu
,
JIANG Jianhua
Pages:
523
-
529
Year:
2011
Issue:
4
Journal:
Journal of China University of Mining & Technology
Keyword:
fly ash concrete
;
pore structure
;
gas diffusion ability
;
Abstract:
通过压汞试验研究了粉煤灰掺量对混凝土孔径分布的影响规律,从气体在混凝土中的扩散机理出发,并结合压汞试验结果研究了粉煤灰掺量对气体O。及CO。在粉煤灰混凝土中扩散能力的影响.结果表明:粉煤灰等量取代水泥达45%时,混凝土总孔隙率、有害孔及多害孔(孔径〉50nm)的分孔隙率、最可几孔径及平均孔径均明显增大;0^2及Co^2气体在普通混凝土及粉煤灰混凝土中扩散时,在大多数孔隙(80%以上)中扩散属于过渡...
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