BROWSE

Related Researcher

Author's Photo

Kim, Jae Hong
Research Group for Concrete Structures and Materials
Research Interests
  • Mechanics of Concrete, Rheology, Structural Analysis, Construction Performance
  • Rheological investigation for the flow of fresh concrete
  • Multiscale material characterization of suspension

ITEM VIEW & DOWNLOAD

Atomic Force Acoustic Microscopy to Measure Nanoscale Mechanical Properties of Cement Pastes

Cited 1 times inthomson ciCited 1 times inthomson ci
Title
Atomic Force Acoustic Microscopy to Measure Nanoscale Mechanical Properties of Cement Pastes
Author
Kim, Jae HongBalogun, OluwaseyiShah, Surendra P.
Keywords
Alternative methods;  Atomic force acoustic microscopy;  Cement paste;  Cementitious materials;  Contact areas;  Elastic properties;  Indentation depth;  Nano scale;  Nanometer level;  Nanoscale mechanical properties;  Reduced modulus;  Resistant force;  Spatial resolution;  Top surface;  Ultrasonic atomic force microscopy
Issue Date
2010
Publisher
NATL ACAD SCIENCES
Citation
TRANSPORTATION RESEARCH RECORD, v.2141, no., pp.102 - 108
Abstract
The measurement of elastic properties at the nanoscale is a prerequisite to building a foundation for nanomechanics applications. At present, nanoindentation is widely used to measure the properties of elasticity. Under this method, a sample is indented with a rigid probe and the resistant force of the indentation is measured. The reduced modulus measured on the basis of the resistant force and the indentation depth is then converted to the elastic modulus of the sample. However, its spatial resolution, the distance between two consecutive locations of measurement, is limited to about 5 pm because of the area of the indented tip. Ultrasonic atomic force microscopy is an alternative method of attaining spatial resolution at the nanometer level. It uses information based on the vibrations transferred from the piezoelectric actuator at the bottom of a sample to the cantilever contacting the top surface of the sample. The cantilever makes contact with a relatively small force; as a consequence, it decreases the contact area and improves the spatial resolution. The application of atomic force acoustic microscopy to a cementitious material is described, and the results of the measurement of the elastic modulus of a cement paste are presented.
URI
https://scholarworks.unist.ac.kr/handle/201301/8236
DOI
10.3141/2141-17
ISSN
0361-1981
Appears in Collections:
UEE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU