Effect of the particle size of nanosilica on the compressive strength and the optimum replacement content of cement mortar containing nano-SiO2
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Haruehansapong S., Pulngern T., Chucheepsakul S.
Publisher: Elsevier
Publication year: 2014
Journal: Construction and Building Materials (0950-0618)
Volume number: 50
Start page: 471
End page: 477
Number of pages: 7
ISSN: 0950-0618
eISSN: 1879-0526
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
This research presents the compressive strengths and the microstructure photographs of cement mortars containing nanosilica (NS) with various sizes of 12, 20 and 40 nm and then compared with cement mortar with silica fume (SF). Tested results indicated that NS significantly improved compressive strength of cement mortar and the strength improvement was also dependent on the NS particle size. Cement mortar containing NS 40 nm gave higher compressive strength compared with NS 12 and 20 nm due to their agglomeration and ineffective dispersion. By varying the replacement contents of 3%, 6%, 9% and 12% NS by weight of cement, the optimum replacement content was 9% for all NS particle sizes and SF. These results indicate that the particle size of nanosilica affected only the compressive strength of cement mortar, but it had no effect on the optimum replacement content. The results of microstructure photographs are also supported the compressive strength and optimum replacement content results. NS particles presented high pozzolanic activity and could fill up pores, resulting in homogeneous, dense and compact microstructures. ฉ 2013 Elsevier Ltd. All rights reserved.
Keywords
cement mortar, Nanosilica
Contact Information