Investigation on characteristics of internal structure of early-age concrete by non-destructive testing

Zhonghe Shui, Sha Ding, Wei Chen, Kai Li, Jianxin Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


Non-destructive methods such as ultrasonic wave, impact echo, and ground penetrating radar were used to study the internal structure of early-age concrete. The results indicate that the ultrasonic, stress, and electromagnetic wave velocity can reflect well the variation of the internal structure in concrete. With the influence of cement hydration, it is obvious that the three wave velocity increases and the dielectric constant decreases in the first 28 days. However, the changing of these characteristics tends to slow down with cement hydration. Results of compressive strength tests show that the combination of the three methods can accurately probe changes in the internal concrete structure at early ages. In addition, structural defects and the above steel bars in reinforced concrete were also investigated using ground penetrating radar together with the impact echo method.

Original languageEnglish
JournalJournal of Testing and Evaluation
Issue number5
Publication statusPublished - Sept 2012
Externally publishedYes


  • Early-age concrete
  • Ground penetrating radar
  • Impact echo
  • Ultrasonic wave

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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