Setting time measurement using ultrasonic wave reflection

Chul Woo Chung, Prannoy Suraneni, John S. Popovics, Leslie J. Struble

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Ultrasonic shear wave reflection was used to investigate setting times of cement pastes by measuring the reflection coefficient at the interface between hydrating cement pastes of varying watercement ratio (w/c) and an ultrasonic buffer material. Several different buffer materials were employed, and the choice of buffer was seen to strongly affect measurement sensitivity; high-impact polystyrene showed the highest sensitivity to setting processes because it had the lowest acoustic impedance value. The results show that ultrasonic shear-wave reflection can be used successfully to monitor early setting processes of cement paste with good sensitivity when such a low impedance buffer is employed. Criteria are proposed to define set times, and the resulting initial and final set times agreed broadly with those determined using the standard penetration resistance test.

Original languageEnglish (US)
Pages (from-to)109-117
Number of pages9
JournalACI Materials Journal
Volume109
Issue number1
StatePublished - Jan 1 2012
Externally publishedYes

Keywords

  • Buffer
  • Cement paste
  • Setting
  • Stiffening
  • Ultrasonic shear wave reflection

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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  • Cite this

    Chung, C. W., Suraneni, P., Popovics, J. S., & Struble, L. J. (2012). Setting time measurement using ultrasonic wave reflection. ACI Materials Journal, 109(1), 109-117.