Freezing-thawing damage characteristics and calculation models of aerated concrete

In this paper, an empirical study aimed at proving the resistance of freezing-thawing cycle of concrete containing air-entraining agent (AEA) is reported. And the damage calculation models were established. The experimental results showed that the compressive strength and fluidity of concrete is wor...

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Bibliographic Details
Published in:Journal of Building Engineering 2020-03, Vol.28, p.101072, Article 101072
Main Authors: Hang, Meiyan, Cui, Lei, Wu, Junqing, Sun, Zhongke
Format: Article
Language:English
Subjects:
Aerated concrete
Air-entraining agent
Damage model
Freezing-thawing damage
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Summary:In this paper, an empirical study aimed at proving the resistance of freezing-thawing cycle of concrete containing air-entraining agent (AEA) is reported. And the damage calculation models were established. The experimental results showed that the compressive strength and fluidity of concrete is worse due to the addition of AEA. When AEA content was 4.6–6.5%, concrete exhibits the best freezing-thawing resistance. Calculation results obtained by damage model agree well with the experimental results of freezing-thawing damage. Moreover, the damage models can guide for predicting service life of aerated concrete structures. •Fluidity of aerated concrete first increases and then decreases, compressive strength decreases.•Concrete with K12 better than concrete with ZG in freezing-thawing resistance.•Damage of concrete with and without AEA can be expressed by Boltzmann equation.•Damage models can provide guidance for predicting service life of aerated concrete structures.
ISSN:2352-7102
2352-7102
DOI:10.1016/j.jobe.2019.101072