Effects of Superplasticizer Types and Mixing Methods of Nanoparticles on Compressive Strengths of Cement Pastes
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 2
Abstract
This paper presents the effects of five different types of superplasticizers on workability and compressive strengths of cement pastes containing nanosilica (NS) and nanocalcium carbonate (NC) particles each at 2% by weight as partial replacement of cement. The NS and NC are dispersed in water containing 1% superplasticizer (by weight of cement) of five different types for 30 min in an ultrasonic mixer at maximum amplitude. Comparison is also made with conventional mechanical dry mixing of NS and NC with cement and ultrasonic mixing of NS and NC in water. Results show that the addition of NS adversely affects the workability of cement pastes more than those containing NC, regardless of superplasticizer types and mixing methods. The measured compressive strengths of cement pastes containing NS and NC dispersed in polycarboxylate ether-based superplasticizer solution are the highest among all five superplasticizer types considered in this study. X-ray diffraction (XRD) analysis results also agree well with the measured compressive strengths.
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Acknowledgments
Authors acknowledge Miss Miriam El-Samad for her assistance during casting and testing of specimens. Grateful acknowledgement is also due to BASF Australia and W.R. Grace, Australia for supplying the superplasticizers used in this study.
References
ASTM. (2012a). “Standard test method for compressive strength of hydraulic cement mortars (using 2-in. or [50-mm] cube specimens).”, West Conshohocken, PA.
ASTM. (2012b). “Standard test method for flow of hydraulic cement mortar.”, West Conshohocken, PA.
Chandra, S., and Björnström, J. (2002). “Influence of superplasticizer type and dosage on the slump loss of portland cement mortars—Part II.” Cem. Concr. Res., 32(10), 1613–1619.
Hanehara, S., and Yamada, K. (1999). “Interaction between cement and chemical admixture from the point of cement hydration, absorption behaviour of admixture, and paste rheology.” Cem. Concr. Res., 29(8), 1159–1165.
Hoshino, S., Yamada, K., and Hirao, H. (2006). “XRD/rietveld analysis of the hydration and strength development of slag and limestone blended cement.” J. Adv. Concr. Technol., 4(3), 357–367.
Kawashima, S., Hou, P., Corr, D. J., Shah, S.P. (2013). “Modification of cement based materials with nanoparticles.” Cem. Concr. Compos., 36, 8–15.
Li, H., Xiao, H., Yuan, J., and Ou, J. (2004). “Microstructure of cement mortar with nano-particles.” Composites Part B, 35(2), 185–189.
Nematollahi, B., and Sanjayan, J. (2014). “Effect of different superplasticizers and activator combinations on workability and strength of fly ash based geopolymer.” Mater. Des., 57, 667–672.
Quercia, G., Husken, G., and Brouwers, H. J. H. (2012). “Water demand of amorphous nano silica and its impact on the workability of cement paste.” Cem. Concr. Res., 42(2), 344–357.
Senff, L., Hotza, D., Repette, W. L., Ferreira, V. M., and Labrincha, J. A. (2009). “Influence of added nanosilica and/or silica fume on fresh and hardened properties of mortars and cement pastes.” Adv. Appl. Ceram., 108(7), 418–428.
Shaikh, F. U. A., and Supit, W. M. S. (2014). “Mechanical and durability properties of high volume fly ash (HVFA) concrete containing calcium carbonate () nanoparticles.” Constr. Build. Mater., 70, 54–64.
Shaikh, F. U. A., Supit, S., and Sarker, P. (2014). “A study on the effect of nano silica on compressive strength of high volume fly ash mortar and concrete.” Mater. Des., 60, 433–442.
Supit, W. M. S., and Shaikh, F. U. A. (2014a). “Durability properties of high volume fly ash concrete containing nano silica.” Mater. Struct., in press.
Supit, W. M. S., and Shaikh, F. U. A. (2014b). “Effect of nano-CaCO3 on compressive strength development of high volume fly ash mortars and concretes.” J. Adv. Concr. Technol., 12(6), 178–186.
Tishmack, J. K., Olek, J., and Diamond, S. (1999) “Characterization of high calcium fly ashes and their potential influence on ettringite formation in cementitious systems.” Cem. Concr. Aggregates, 21(1), 82–92.
Zhang, M. H., and Islam, J. (2012). “Use of nano-silica to reduce setting time and increase early strength of concretes with high volume fly ash or slag.” Constr. Build. Mater., 29, 573–580.
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© 2015 American Society of Civil Engineers.
History
Received: Oct 31, 2014
Accepted: May 6, 2015
Published online: Jul 6, 2015
Discussion open until: Dec 6, 2015
Published in print: Feb 1, 2016
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