Using ultrasound to monitor stiffening process of concrete with admixtures

Julie R. Rapoport, John S. Popovics, Subramaniam V. Kolluru, Surendra P. Shah

Research output: Contribution to journalArticlepeer-review


A nondestructive one-sided wave reflection factor (WRF) test was applied to concrete with a variety of admixtures, including an accelerator, silica fume as replacement, a high-range water-reducing admixture, and a retarder. Tlie results are presented herein. The WRF test is sensitive to the presence of admixtures. In addition to WRF tests, dynamic modulus tests were performed on normal- and high-strength concretes. Tlie results from these tests are correlated with the results from the WRF tests. A neir, objective method for determining the time of occurrence of critical points on the WRF curve was developed. Tlie critical WRF points were found to correlate well with critical points in set time and cement hydration processes.

Original languageEnglish (US)
Pages (from-to)675-683
Number of pages9
JournalACI Structural Journal
Issue number6
StatePublished - 2000
Externally publishedYes


  • Admixture
  • Concrete
  • Ultrasonic

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


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