Early age stiffening of cement paste using ultrasonic wave reflection

C. Chung, John S Popovics, L. J. Struble

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ultrasonic wave reflection (UWR) has been used to monitor hydration and strength development of concrete. UWR measures the changes in reflected ultrasonic waves at the interface between a buffer material and hydrating cement paste. To monitor the subtle changes during early hydration it is necessary to use a buffer with low acoustic impedance, close to that of cement paste. In this research, UWR measurements on hydrating Type I portland cement are performed using a high impact polystyrene (HIPS) buffer. Both S-waves and P-waves are analyzed simultaneously to develop and extend the use of UWR to monitor early stiffening of cement paste. The penetration resistance test (ASTM C 403) and temperature rise of cement paste are used to correlate stiffening characteristics. The UWR responses show good correlation with results from temperature rise and penetration resistance. The onset of stiffening is the same for penetration resistance and both P- and S-wave UWR, and nearly the same for temperature rise. It is found that the HIPS buffer can provide sensitive measurement on the early age stiffening of cement paste.

Original languageEnglish (US)
Title of host publicationTransition from Fluid to Solid
Subtitle of host publicationRe-examining the Behavior of Concrete at Early Ages - Technical Session at the 2009 ACI Spring Conference
Pages1-9
Number of pages9
Edition259 SP
StatePublished - Nov 23 2009
EventTransition from Fluid to Solid: Re-examining the Behavior of Concrete at Early Ages - Technical Session at the 2009 ACI Spring Conference - San Antonio, TX, United States
Duration: Mar 15 2009Mar 19 2009

Publication series

NameAmerican Concrete Institute, ACI Special Publication
Number259 SP
ISSN (Print)0193-2527

Other

OtherTransition from Fluid to Solid: Re-examining the Behavior of Concrete at Early Ages - Technical Session at the 2009 ACI Spring Conference
CountryUnited States
CitySan Antonio, TX
Period3/15/093/19/09

Keywords

  • Cement paste
  • Penetration resistance
  • Stiffening
  • Temperature rise
  • Ultrasonic wave reflection (UWR)

ASJC Scopus subject areas

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

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  • Cite this

    Chung, C., Popovics, J. S., & Struble, L. J. (2009). Early age stiffening of cement paste using ultrasonic wave reflection. In Transition from Fluid to Solid: Re-examining the Behavior of Concrete at Early Ages - Technical Session at the 2009 ACI Spring Conference (259 SP ed., pp. 1-9). (American Concrete Institute, ACI Special Publication; No. 259 SP).