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Silica Fume and Nanosilica Effects on Mechanical and Shrinkage Properties of Foam Concrete for Structural Application
Joint Authors
Gong, Jianqing
Zhu, Lilin
Li, Jiusu
Shi, Da
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-27
Country of Publication
Egypt
No. of Pages
10
Abstract EN
Adding the appropriate amount of silica fume (SF) or nanosilica (NS) can improve the strength and reduce the shrinkage of foam concrete (FC), thereby widening its application.
This paper reports on a study of FC mechanical and shrinkage properties when varying SF and NS proportions were used to replace cement.
Scanning electron microscopy (SEM) and nonmetallic ultrasonic detection were employed to investigate the mechanism of strength changes.
The result showed that when the SF and NS content was 15% and 4%, in the 28 days, the compressive strength of FC peaked at 32.8 MPa and 35.8 MPa, and the flexural strength maximized at 7.9 MPa and 9.1 MPa, respectively.
The autogenous shrinkage reached the minimum value, separately, i.e., 741.2 × 10−6 and 797.1 × 10−6.
The dry shrinkage value was the highest (862.5 × 10−6 and 1387.5 × 10−6).
The results indicated that the compressive and flexural strength of FC first increased and then decreased as SF and NS content increased.
Autogenous shrinkage first decreased and then increased with the increase of SF or NS content.
An opposite trend of dry shrinkage could be observed.
FC made with NS had higher shrinkage than it did with SF.
The results also indicated that there was a correlation between microstructure and sound velocity in the presence of SF or NS.
American Psychological Association (APA)
Gong, Jianqing& Zhu, Lilin& Li, Jiusu& Shi, Da. 2020. Silica Fume and Nanosilica Effects on Mechanical and Shrinkage Properties of Foam Concrete for Structural Application. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1128268
Modern Language Association (MLA)
Gong, Jianqing…[et al.]. Silica Fume and Nanosilica Effects on Mechanical and Shrinkage Properties of Foam Concrete for Structural Application. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1128268
American Medical Association (AMA)
Gong, Jianqing& Zhu, Lilin& Li, Jiusu& Shi, Da. Silica Fume and Nanosilica Effects on Mechanical and Shrinkage Properties of Foam Concrete for Structural Application. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1128268
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1128268