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A study on application of natural pozzolans in concrete – for strength and durability



Title: A study on application of natural pozzolans in concrete – for strength and durability
Author(s): P.R. Chakrabarti, Phuoc Nguyen
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 8
Language: English


Abstract: In this article an attempt is made to study the behavior of concrete using natural pozzolans (clay) named PozzXA. Various percentages of PozzXA were used to replace cement. In the case (Phase-II), one particular variety of natural pozzolan, PozzXA-V5 was used and the particle sizes were varied. The particle sizes (according to mode of distribution) were 25 microns, 15 microns and 10 microns. Specimens were prepared with various percentages of PozzXA-V5. A portion of PozzXA-V5 was calcined. For comparison purposes, some specimens were made with a popular brand of natural pozzolan, available in the market, called PowerPozz. A water-reducing admixture called Admixture-C was used in some of the specimens. Strength tests were made according to ASTM C-39 (in Phase-I and PhaseII), and comparisons were made. The results of PhaseII of this research project are discussed here.
In this article Sulfate and Alkali resistance of PozzXA-V5 is also reported. For these tests, specimens were prepared with various percentages of PozzXA-V5 for replacing cement. The particle sizes (mode of distribution) were 15 microns and 10 microns. A water-reducing admixture called Admixture-C was used in some specimens. The Sulfate and Alkali resistance tests were made according to ASTM C-1012 and C- 1260 respectively. Comparisons were made with the control specimens and the results of Phase II are reported here.


Online publication: 2004-03-25
Classification: General Issues in Durability
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.052