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Performance of concrete subjected to severe multiple actions of composite salts solution under wet-dry cycles and flexural loading in lab

  • Yanjuan Chen (陈燕娟)
  • Jianming Gao (高建明)Email author
  • Luping Tang
  • Daman Shen
Cementitious materials

Abstract

Several action regimes were employed, namely, those exposed to solutions containing single and/or composite chloride and sulfate salts, and under wet-dry cycles and/or flexural loading. The variations in dynamic modulus of elasticity (E rd values) were monitored, as well as the key factor impacting on the chloride ingress when concrete subjected to multiple action regimes was identified by the method of Grey Relation Analysis (GRA). The changes in micro-structures and mineral products of interior concrete after different action regimes were investigated by means of X-ray diffraction (XRD), mercury intrusion technique (MIP), and scanning electron microscopy (SEM). The test results showed that the cyclic wet-dry accelerated the deterioration of OPC concrete more than the action of 35% flexural loading based on the results of E rd values and the GEA. The analyses from micro-structures could give certain explanations to the change in E rd values under different action regimes.

Key words

concrete wet-dry cycles flexural loading composite salts solution grey relation analysis 

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Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Yanjuan Chen (陈燕娟)
    • 1
    • 2
  • Jianming Gao (高建明)
    • 1
    • 2
    Email author
  • Luping Tang
    • 3
  • Daman Shen
    • 1
    • 2
  1. 1.Department of Materials Science and EngineeringSoutheast UniversityNanjingChina
  2. 2.Key Laboratory of Construction MaterialsSoutheast UniversityNanjingChina
  3. 3.Chalmers University of TechnologyGothenburgSweden

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