Abstract
To design robust self-consolidating concrete (SCC) for various environmental conditions, it is essential to understand the relevant mechanisms that control the flow performance. This paper depicts how high range water reducing agents (HRWRAs) interact with clinker and hydration phases, and it discusses the important role of the charge density of polycarboxylic HRWRAs in the way the rheology is affected. Based on the rheometric investigations on SCC mixture compositions with different water to powder ratios (w/p) and observations of their pastes' Vicat setting times, the study shows that increasing charge densities of the HRWRA and decreasing w/p reduce the flow retention and have lesser retarding effect on the setting. Based on the test results and discussions optimization procedures for the mixture composition and the HRWRA modification are suggested to achieve optimized performance for varying environmental situations and highest robustness for specific conditions.
Issue Section:
Research Papers
References
1.
Yoshioka
, K.
,Tazawa
, E.-I.
,Kawai
, K.
, andEnohata
, T.
, “Adsorption Characteristics of Superplasticizers on Cement Component Minerals
,” Cem. Concr. Res.
, Vol. 32
, No. 10
, 2002
, pp.1507
–1513
. https://doi.org/10.1016/S0008-8846(02)00782-22.
Plank
, J.
andHirsch
, C.
, “Impact of Zeta Potential of Early Cement Hydration Phases on Superplasticizer Adsorption
,” Cem. Conr. Res.
, Vol. 37
, No. 4
,2007
, pp.537
–542
. https://doi.org/10.1016/j.cemconres.2007.01.0073.
Uchikawa
, H.
,Hanehara
, S.
, and Sawaki
, D.
, “The Role of Steric Repulsive Force in the Dispersion of Cement Particles in Fresh Paste Prepared With Organic Admixture
,” Cem. Concr. Res.
, Vol.27
, No. 1
, 1997
, pp.37
–50
. https://doi.org/10.1016/S0008-8846(96)00207-44.
Houst
, Y.F.
,Flatt
, R.J.
,Bowen
, P.
, andHofmann
, H.
, “Influence of Superplasticizer Adsorption on the Rheology of Cement Paste
,” Proceedings of the International Symposium on the Role of Admixtures in High Performance Concrete
, Monterrey, Mexico, March 21–26,1999
, pp. 387
–402
.5.
Hanehara
, S.
andYamada
, K.
, “Interaction Between Cement and Chemical Admixture from the Point of Cement Hydration, Absorption Behaviour of Admixture, and Paste Rheology
,” Cem. Concr. Res.
, Vol.29
, No. 8
, 1999
, pp.1159
–1165
. https://doi.org/10.1016/S0008-8846(99)00004-66.
Schober
, I.
andFlatt
, R.J.
, “Studying Admixtures With the 5C Rheometer
,” Proceedings of the 8th CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete
, Sorrento, Italy, Oct. 29–Nov. 1, 2006
, pp. 93
–104
.7.
Plank
, J.
,Bassioni
, G.
,Dai
, Z.
,Keller
, H.
, andSachsenhauser
,B.
, “Neues zur Wechselwirkung zwischen Zementen und Polycarboxylat-Fließmitteln
,”Proceedings of the 16th International Conference on Building Materials—Ibausil
, Weimar, Germany, Sept. 20–23, 2006
, pp. 579
–598
.8.
Yamada
, K.
,Ogawa
, S.
, andHanehara
, S.
, “Controlling of the Adsorption and Dispersing Force of Polycarboxylate-Type Superplasticizer by Sulfate Ion Concentration in Aqueous Phase
,” Cem. Concr. Res.
, Vol.31
, No. 3
, 2001
, pp.375
–383
. https://doi.org/10.1016/S0008-8846(00)00503-29.
Yamada
, K.
,Yanagisawa
, T.
, and Hanehara
, S.
, “Influence of Temperature on the Dispersibility of Polycarboxylate Type Superplasticizer for Highly Fluid Concrete
,” Proceedings of the International RILEM Symposium on Self-Compacting Concrete
, Stockholm, Sweden, Sept. 13–15, 1999
, pp.437
–448
.10.
JSCE
, Recommendation for Self-Compacting Concrete
, Vol. 31
,JSCE
, Tokyo
,1999
.11.
Taylor
, H.F. W.
, “Modification of the Bogue Calculation
,” Adv. Cem. Res.
, Vol. 2
, No. 6
, 1989
, pp.73
–77
. https://doi.org/10.1680/adcr.1989.2.6.7312.
Schmidt
, W.
,Brouwers
, H.J. H.
,Kuehne
, H.-C.
, andMeng
, B.
, “Influence of Environmental Temperatures on the Performance of Polymeric Stabilising Agent in Fresh Cementitious Materials
,” Key Eng. Mater.
, Vol.466
, 2011
, pp.97
–104
. https://doi.org/10.4028/www.scientific.net/KEM.466.9713.
Lothenbach
, B.
,Winnefeld
, F.
, and Figi
, R.
, “The Influence of Superplasticizers on the Hydration of Portland Cement
,” Proceedings of the 12th International Congress on the Chemistry of Cement
, Montreal, QC, July 8–13, 2007
.14.
Pourchet
, S.
,Comparet
, C.
,Nicoleau
, L.
, and Nonat
, A.
, “Influence of PC Superplasticizers on Tricalcium Silicate Hydration
,” Proceedings of the 12th International Congress on the Chemistry of Cement
, Montreal, QC, July 8–13, 2007
.15.
Zingg
, A.
,2008
, “Cement-Superplasticizer Interaction—Link Between Macroscopic Phenomena and Microstructural Data of the Early Cement Hydration
,”Ph.D. thesis, ETH Zuerich
, Zuerich, Switzerland.16.
Sowoidnich
, T.
, andRößler
,C.
, “The Influence of Superplasticizers on the Dissolution of C3S
,” Proceedings of the 9th International Conference on Superplasticizers and other Chemical Admixtures
, pp. 335
–346
,2009
.17.
Wadsö
, L.
, “Applications of an Eight-Channel Isothermal Conduction Calorimeter for Cement Hydration Studies
,” Cem. Int.
, Vol. 5
, 2005
, pp.94
–101
.18.
Schmidt
, W.
, “Influence of the Processing Temperature and Combined Admixtures on the Properties of Self-Compacting Concrete
,” Proceedings of the 7th International fib PhD Symposium in Civil Engineering
, Stuttgart, Germany, Sept. 11–13, 2008
, pp.75
–84
.19.
Zingg
, A.
,Winnefeld
, F.
,Holzer
L.
, Pakusch
,J.
, Becker
,S.
, Figi
,R.
, andGauckler
, L.
, “Interaction of Polycarboxylate-Based Superplasticizers with Cements Containing Different C3A Amounts
,” Cem. Concr. Compos.
, Vol.31
, No. 3
, 2009
, pp.153
–162
. https://doi.org/10.1016/j.cemconcomp.2009.01.005
This content is only available via PDF.
All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of ASTM International.
You do not currently have access to this content.
