The range of methodologies available for pozzolan classification, predicated on different viewpoints, may occasionally offer conflicting judgements regarding pozzolans. The present study compared the results obtained by assessing several natural pozzolans, silica fume and fly ash within the requirements of ASTM C618 and ASTM C1240. In addition, binary combinations of the pozzolans and Portland cement were investigated using EN 196-5. The outcomes manifested some anomalies between the different approaches. Complementary observations (such as environmental scanning electron microscope, insoluble residue and hardened concrete properties) were conducted to further clarify the results. The compressive strength and depth of water penetration of the concrete specimens containing the pozzolans revealed that EN 196-5 had superior compatibility with real concrete performance. This suggests that EN 196-5, which was originally developed for pozzolanic cements, can successfully determine the activity of Portland pozzolanic cements containing natural pozzolans, silica fume and fly ash.
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July 2010
Research Article|
July 01 2010
A comparative study of the evaluation methods for pozzolans
A.R. Pourkhorshidi;
A.R. Pourkhorshidi
*
Building and Housing Research Center, Tehran; Technical University of Berlin
* Department of Concrete Technology, Building and Housing Research Center (BHRC), Tehran, Iran.
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M. Najimi;
M. Najimi
*
Building and Housing Research Center, Tehran; Technical University of Berlin
* Department of Concrete Technology, Building and Housing Research Center (BHRC), Tehran, Iran.
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T. Parhizkar;
T. Parhizkar
*
Building and Housing Research Center, Tehran; Technical University of Berlin
* Department of Concrete Technology, Building and Housing Research Center (BHRC), Tehran, Iran.
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B. Hillemeier;
B. Hillemeier
†
Building and Housing Research Center, Tehran; Technical University of Berlin
† Institute of Civil Engineering, Technical University of Berlin, Berlin, Germany.
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* Department of Concrete Technology, Building and Housing Research Center (BHRC), Tehran, Iran.
† Institute of Civil Engineering, Technical University of Berlin, Berlin, Germany.
Publisher: Emerald Publishing
Received:
November 25 2009
Revision Received:
November 25 2009
Accepted:
November 25 2009
Online ISSN: 1751-7605
Print ISSN: 0951-7197
© 2010 Thomas Telford Ltd
2010
Advances in Cement Research (2010) 22 (3): 157–164.
Article history
Received:
November 25 2009
Revision Received:
November 25 2009
Accepted:
November 25 2009
Citation
Pourkhorshidi A, Najimi M, Parhizkar T, Hillemeier B, Herr R (2010), "A comparative study of the evaluation methods for pozzolans". Advances in Cement Research, Vol. 22 No. 3 pp. 157–164, doi: https://doi.org/10.1680/adcr.2010.22.3.157
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