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Pore structure characteristics affecting the permeability of cement paste containing fly ash

✍ Scribed by B.K. Marsh; R.L. Day; D.G. Bonner

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 523 KB
Volume: 15
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(85)90094-8

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✦ Synopsis

Results are presented ~rom measurements o{ the permeability o~ saturated, hardened cement pastes, with and without fly ash.Specimens tested were cured over a temperature range from 20 to 65°C for periods from seven days to one year.
The results
show that a dramatic reduction in permeability occurs due to the pozzolanic reaction of the fly ash.Porosity estimates from mercury-intrusion porosimetry and helium-comparison pvcnometry are used to develop an explanation for the permeability reduction. Traditional explanations, based on a reduction in the volume of large pores, are found to be inadequate. Vol. I~), No. ,> B.K. Marsh, et al .

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