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Influence of carbonation on alkali-aggregate reaction in concrete

Liu, Jun-zhe ; Yuan, Wei-jing ; He, Zhi-min ; Ba, Ming-fang ; Chen, Jian-bin

Jilin da xue xue bao. Journal of Jilin University. Engineering and technology edition. Gong xue ban, 2015-05, Vol.45 (3), p.783-787

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Título:
Influence of carbonation on alkali-aggregate reaction in concrete
Autor: Liu, Jun-zhe ; Yuan, Wei-jing ; He, Zhi-min ; Ba, Ming-fang ; Chen, Jian-bin
Assuntos: Alkali-aggregate reactions ; Carbonation ; Cements ; Concretes ; Hardening ; Ion concentration ; Pastes ; Sodium
É parte de: Jilin da xue xue bao. Journal of Jilin University. Engineering and technology edition. Gong xue ban, 2015-05, Vol.45 (3), p.783-787
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: In order to reasonably evaluate alkali content generated in alkali-aggregation reaction in concrete, the influence of carbonation on sodium ion concentration distribution inside hardened cement paste was investigated; the alkali-aggregate reaction characteristics in concrete under carbonation were clarified. The results show that sodium chloride distribution is relatively uniform before carbonation; during carbonation process sodium ions in the carbonation area migrate to the non-carbonation area, sodium ion concentration decreases in the carbonation area and increases in the non-carbonation area, and reaches maximum peak value in the carbonation interface. Thus the carbonation increases the sodium ion concentration in non-carbonation area in the concrete and reduces the initial critical sodium ion concentration for alkali aggregate reaction in the concrete that accelerates the alkali aggregate reaction.
Idioma: Chinês

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