Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Concrete thawing studied by single-point ramped imaging

P J Prado1, B J Balcom, S D Beyea

  • 1MRI Centre, Department of Physics, University of New Brunswick, Fredericton, Canada.

Solid State Nuclear Magnetic Resonance
|February 24, 1998
PubMed
Summary

Researchers imaged proton distribution in concrete during thawing using fast magnetic resonance imaging. This technique effectively visualizes frozen water changes in porous materials over time.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The matrix pencil as a tunable filter.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2024
Same author

Local T<sub>1</sub>-T<sub>2</sub> distribution measurements in porous media.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2018
Same author

A high-pressure metallic core holder for magnetic resonance based on Hastelloy-C.

The Review of scientific instruments·2018
Same author

An MR/MRI compatible core holder with the RF probe immersed in the confining fluid.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2017
Same author

Local diffusion and diffusion-T<sub>2</sub> distribution measurements in porous media.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2017
Same author

Local T2 measurement employing longitudinal Hadamard encoding and adiabatic inversion pulses in porous media.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2015

Area of Science:

  • Materials Science
  • Physics
  • Engineering

Background:

  • Understanding water transport in porous materials like concrete is crucial for durability assessment.
  • Phase transitions of water within concrete significantly impact its structural integrity.
  • Non-invasive imaging techniques are needed to study these dynamic processes.

Purpose of the Study:

  • To investigate the spatial distribution of protons (water) in hardened concrete during thawing.
  • To evaluate the suitability of a specific magnetic resonance imaging (MRI) sequence for this application.
  • To develop an efficient imaging method for monitoring water dynamics in concrete.

Main Methods:

  • Utilized a two-dimensional imaging technique with the SPRITE (Simultaneous Proton Resonance Imaging and True Echo) sequence.

Related Experiment Videos

  • Optimized MRI sequence parameters based on measured relaxation times (T2* < 200 µs, T1 < 3.6 ms) for time-efficient data acquisition.
  • Achieved a 4-scan, 64x64 resolution image acquisition in under 3 minutes.
  • Quantified frozen water distribution by analyzing image contrast and employing a multiple-point acquisition method.

    • Main Results:

    • Successfully obtained images of proton distribution in hardened concrete during thawing from -50°C to 11°C.
    • The SPRITE sequence proved optimal due to the short relaxation times of water in the concrete matrix.
    • The optimized imaging protocol enabled fast data acquisition, synchronized with the temperature evolution of the sample.
    • Frozen water distribution was effectively quantified through image contrast analysis.

    Conclusions:

    • The study demonstrates the efficacy of fast MRI, specifically the SPRITE sequence, for imaging proton distribution in concrete during thawing.
    • The developed method allows for rapid and quantitative assessment of frozen water dynamics in porous materials.
    • This technique offers valuable insights into material behavior under changing thermal conditions, relevant for material science and engineering applications.