Hostname: page-component-848d4c4894-2xdlg Total loading time: 0 Render date: 2024-07-02T14:45:53.707Z Has data issue: false hasContentIssue false
  • English
  • Français

Microscopic investigation of modified hydration kinetics in tricalcium silicate paste and mortar strength caused by dicalcium silicate addition

Published online by Cambridge University Press:  31 January 2011

Vanessa K. Peterson ,
Paul E. Stutzman  and
Richard A. Livingston
Vanessa K. Peterson*
Affiliation:
Bragg Institute, Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia
Paul E. Stutzman
Affiliation:
Building and Fire Research Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8621
Richard A. Livingston
Affiliation:
Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115
*
a)Address all correspondence to this author. e-mail: vanessa.peterson@ansto.gov.au
Get access

Abstract

It was recently revealed that some processes of hydrating tricalcium silicate are altered by the addition of dicalcium silicate. Previous neutron scattering results revealed two critical tri/dicalcium silicate compositions. At one composition, changes in the early time hydration kinetics were observed that result in the formation of more products (reflected in increased 28 day strength), despite dicalcium silicate being essentially unreactive at early times. At the other composition, changes in the early-time hydration kinetics were observed that correspond to reduced strength. The current work uses scanning electron microscope analysis with backscattered electron imaging of 50 day hydrated tri- and dicalcium silicate mortars to reveal that at the former critical composition increased hydration of the tricalcium silicate phase occurs, and at the latter critical composition, the amount of dicalcium silicate reacted is decreased.

Keywords

Chemical reactionMicrostructureScanning electron microscopy (SEM)
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 4 , April 2008 , pp. 1015 - 1019
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Taylor, H.F.W.Cement Chemistry, 2nd ed.Thomas Telford London, UK 1997CrossRefGoogle Scholar
2Peterson, V.K., Neumann, D.A.Livingston, R.A.: Inelastic neutron scattering investigation of hydrating tricalcium and dicalcium silicate mixture pastes: Ca(OH)2 formation and evolution of strength. J. Mater. Res. 21, 1836 2006CrossRefGoogle Scholar
3Peterson, V.K., Neumann, D.A.Livingston, R.A.: Interactions of hydrating tricalcium and dicalcium silicate using time-resolved quasielastic neutron scattering in Neutron and X-Ray Scattering as Probes of Multiscale Phenomena,, edited by S.R. Bhatia, P.G. Khalifah, D.J. Pochan, and P.G. Radelli (Mater. Res. Soc. Symp. Proc. 840, Warrendale, PA, 2005), Q2.2, p. 33CrossRefGoogle Scholar
4Peterson, V.K., Neumann, D.A.Livingston, R.A.: Hydration of tricalcium and dicalcium silicate mixtures studied using quasielastic neutron scattering. J. Phys. Chem. B 109, 14449 2005CrossRefGoogle ScholarPubMed
5ASTMSection four: Construction, designation: C 109/C in Annual Book of ASTM Standards ASTM W. Conshohocken, PA 2000Google Scholar
6Bentz, D.P.Stutzman, P.E.: SEM analysis and computer modelling of hydration of portland cement particles in Petrography of Cementitious Materials, edited by S.M. DeHayes and D. Stark ASTM Philadelphia, PA 1994 60CrossRefGoogle Scholar
7Bentz, D.P., Stutzman, P.E., Haecker, C.J.Remond, S. SEM/X-ray imaging of cement-based materials in the Seventh Euroseminar on Microscopy Applied to Building Materials,, edited by H.S. Pietersen, J.A. Larbi, and H.H.A. Janssen Delft University of Technology 1999 457Google Scholar
8Stutzman, P.E.: Scanning electron microscopy imaging of hydraulic cement microstructure. Cem. Concr. Compos. 26, 957 2004CrossRefGoogle Scholar
9Rasband, W.S.: Image J U.S. National Institutes of Health Bethesda, MD 1997–2005Google Scholar
10Bonnet, N., Cutrona, J.Herbin, M.: A “no-threshold” histogrambased image segmentation method. Pattern Recognit. 35, 2319 2002CrossRefGoogle Scholar
11Hilliard, J.E.Cahn, J.W.: An evaluation of procedures in quantitative metallography for volume-fraction analysis. TMS AIME 221, 344 1961Google Scholar