Mixing of Concretes with Extremely Low Water-Cement Ratio

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This article deals with the ways of mixing method for concrete with extremely low water-cement ratio (w/c) typical for ultra-high performance concretes. For this purpose, the mixture with w/c ratio of 0.2 and amount 6% superplasticizers of cement weight was used. In total 6 various mixing methods was tested, which differed in application of superplasticizers, mixing order or mixing length. Workability, electricity consumption during mixing and compressive and flexural strength after 28 days were examined. The performed experiments showed that workability can be increased by, for example, separate doses of superplasticizers and water or other mixing methods. Strength of concrete was identical for all produced mixtures, even though the total mixing time was shortened in two cases.

Info:

Periodical:

Solid State Phenomena (Volume 259)

Edited by:

Šárka Nenadálová, Petra Johová and Tereza Sajdlová

Pages:

41-45

DOI:

10.4028/www.scientific.net/SSP.259.41

Citation:

M. Ženíšek et al., "Mixing of Concretes with Extremely Low Water-Cement Ratio", Solid State Phenomena, Vol. 259, pp. 41-45, 2017

Online since:

May 2017

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$35.00

* - Corresponding Author

[1] S. Diamond, The microstructure of cement paste and concrete–a visual primer, Cement & Concrete Composites. 26 (2004) 919–933.

DOI: 10.1016/j.cemconcomp.2004.02.028

[2] B. Möser, C. Pfeifer, Microstructure and Durability of Ultra-High Performance Concrete, In Proceedings of Second International Symposium on Ultra High Performance Concrete. (2008) 417–424.

[3] D. Chopin, F. de Larrard, C. Cazacliu, Why do HPC and SCC require a longer mixing time?, Cement and Concrete Research. 34 (2004) 2237–2243.

DOI: 10.1016/j.cemconres.2004.02.012

[4] O. Mazanec, P. Schießl, Mixing Time Optimisation for UHPC, In Proceedings of Second International Symposium on Ultra High Performance Concrete. (2008) 401–408.

[5] N. V. Tue, J. Ma, M. Orgass, Influence of addition method of superplasticizer on the properties of fresh UHPC, In Proceedings of Second International Symposium on Ultra High Performance Concrete. (2008) 93–100.

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