Influence of fly ash on early-age cracking behavior of high-flowing concrete

  • Jian-lan Zheng (郑建岚)
  • Xue-fang Wang (王雪芳)Email author


The effects of quality and content of fly ash on the early-age cracking behavior of high-flowing concrete (HFC) were investigated. The early-age cracking behavior of the HFC was analyzed by combining the tests of evaporation capacity and electrical resistivity of the HFC. In these tests, a modified flat-type specimen was adopted. The results show that the HFC will have a lower evaporation capacity when it is mixed with fine fly ash, while it will have a higher evaporation capacity when grade III fly ash is used as mineral admixture. And the electrical resistivity rate of HFC reduces with the increase of the content of fly ash. A nonlinear relationship exists between the cracking time of HFC and the minimum electrical resistivity. The early-age cracking behavior of HFC with fly ash can be enhanced by appropriately increasing the fine particle content and MgO, K2O, and SO3 contents of fly ash. The optimal content of fly ash, which makes a satisfied early-age cracking behavior of HFC, is obtained. And when the content of fly ash exceeds a critical value, the early-age cracking behavior of HFC will rapidly decrease.

Key words

high-flowing concrete fly ash cracking behavior electrical resistivity 


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Copyright information

© Central South University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Jian-lan Zheng (郑建岚)
    • 1
  • Xue-fang Wang (王雪芳)
    • 1
    Email author
  1. 1.Department of Civil EngineeringFuzhou UniversityFuzhouChina

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