Hydration characteristics of silicafume - fly ash composite cement pastes
Author
Source
Housing and Building National Research Center Journal
Issue
Vol. 6, Issue 1 (30 Apr. 2010), pp.56-64, 9 p.
Publisher
Housing and Building National Research Center
Publication Date
2010-04-30
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
Topics
Abstract EN
Composite cement is composed of Portland cement and two or more inorganic materials that take part in the hydration reaction.
Composite concretes have properties such as slower and decreased total heat evolution in massive structures, improved durability with microsilica, strengths above the normal range.
The objective of this work is to study the properties of silica fume-fly ash composite cement pastes up to 90 days.
The substitution of silica fume (SF) by fly ash (FA) decreases the water of consistency and accelerates the setting.
Partial substitution of silica fume by 5-15 % FA shortened the setting time and decreased total porosity, increased bulk density and compressive strength of the cement pastes.
The addition of 20 % FA retards the initial setting due to its low hydraulic properties in comparison with SF.
Mixes with 15 and 20 % FA show a high compressive strength at later ages.
The IR and DTA of 20 % fly ash cement pastes show that the free lime and combined water contents increase with curing time up to 28 days and then decrease at 90 days.
On the other side, the free lime increases and the combined water decreases with FA content due to the high pozzolanic activity of silica fume in comparison with FA .
American Psychological Association (APA)
al-Sukkari, T. M.. 2010. Hydration characteristics of silicafume - fly ash composite cement pastes. Housing and Building National Research Center Journal،Vol. 6, no. 1, pp.56-64.
https://search.emarefa.net/detail/BIM-45355
Modern Language Association (MLA)
al-Sukkari, T. M.. Hydration characteristics of silicafume - fly ash composite cement pastes. Housing and Building National Research Center Journal Vol. 6, no. 1 (Apr. 2010), pp.56-64.
https://search.emarefa.net/detail/BIM-45355
American Medical Association (AMA)
al-Sukkari, T. M.. Hydration characteristics of silicafume - fly ash composite cement pastes. Housing and Building National Research Center Journal. 2010. Vol. 6, no. 1, pp.56-64.
https://search.emarefa.net/detail/BIM-45355
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references: p. 63-64
Record ID
BIM-45355