The Influence of Zinc on the Hydration and Compressive Strength of Portland Cement

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The aim of this work was to investigate the effect of addition of elements present in secondary raw materials on the hydration and compressive strength of Portland cement. Ordinary Portland cement (OPC) has been used to solidify hazardous waste for about 25 years and the effect of waste components on the hydraulic activity is an interesting object for the research. In this study Zn nitrate, chloride and oxide were added to Portland cement. The concentrations of 0.1 and 1.0 weight percent of zinc in cement were tested. After 1, 7 and 28 days the compressive strength was reduced or similar by the addition of zinc in comparison with pure cement. This difference is probably due to a delay in tricalcium silicate hydration as shown by isothermal calorimetry.

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43-46

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August 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] Lea's chemistry of cement and concrete. 4th ed. Editor Peter C Hewlett. Oxford: Elsevier, 2004, 1057 s. ISBN 07-506-6256-5.

Google Scholar

[2] P. Šiler, J. Krátký, I. Kolářová, J. Havlica and J. Brandštetr. Calorimetric determination of the effect of additives on cement hydration process. Calorimetric paper. 2013, vol. 67, num. 2, s. 213-220.

DOI: 10.2478/s11696-012-0256-x

Google Scholar

[3] N. Gineys, G. Aouad and D. Damidot. Managing trace elements in Portland cement – Part I: Interactions between cement paste and heavy metals added during mixing as soluble salts. Cement and concrete composites. 2010, č. 32, 563 - 570.

DOI: 10.1016/j.cemconcomp.2010.06.002

Google Scholar

[4] H.F.W. Taylor, Cement chemistry. [2nd pr. ]. London: Academic Press, 1990. ISBN 01-268-3900-X.

Google Scholar

[5] Q. Y., Chen, M. Tyrer, C. D. Hills, X. M. Yang and P. Carey. Immobilisation of heavy metal in cement-based solidification/stabilisation: A review. Waste management. 2009, č. 29, 390 - 403.

DOI: 10.1016/j.wasman.2008.01.019

Google Scholar

[6] N. Gineys, G. Aouad a D. Damidot. Incorporation of trace elements in Portland cement clinker: Tresholds limits for Cu, Ni, Sn or Zn. Cement and concrete research. 2011, č. 41, 1177 - 1184.

DOI: 10.1016/j.cemconres.2011.07.006

Google Scholar

[7] OLMO, I. F., E. CHACON and A. IRABIEN. Influence of lead, zinc, iron (III) and chromium (III) oxides an the setting time and strenght development of Portland cement. Cement and concrete research. 2001, č. 31, 1213 - 1219.

DOI: 10.1016/s0008-8846(01)00545-2

Google Scholar