Research Articles | Challenge Journal of Concrete Research Letters

The Stability of Fresh Zero-Slump Concrete

Christian Otto Sørensen


This report focuses upon the effects of cement-substitution in part by two potash feldspar powders, and by silica-fume, on the fresh concrete strength of newly compacted cylinder samples. The water/cement-ratio was kept constant at 0.31. An Intensive Compaction Tester (abbrev: IC-Tester) which exerts a slow kneading action under pressure on the sample in a cylindrical mold, was utilized. It was found that the fresh cylinder compressive strength increased with decreasing water-content and more than doubled with each of the 3 fillers replacing 30 % of the cement-volume. A tradeoff was a loss in 28-day compressive strength for both of the feldspars, while the 28-day strength of the silica-samples remained virtually unaffected.


zero-slump concrete; meniscus; fresh strength; fillers; cement-replacement

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Hüsken, G. and Brouwers, H. J. H., “On the early-age behavior of zero-slump concrete”, Cement and Concrete Research, Vol. 42, 2012, pages 501 – 510.

Street, R. L., and Walters, G. C. and Vennard, J. K., “Elementary Fluid Mechanics”, 7th edition, Stanford University, John Wiley & Sons, Inc., U. S. A., 1996.

Mason, T. G., Levine, A. J., Ertas, D., Halsey, T. C., “Critical angle of wet sandpiles”, Exxon Research and Engineering, Route 22 East, Annandale, N.J. 08801, U. S. A. , 1999. PRE.pdf.

Halsey, T. C. and Levine, T., “How Sandcastles Fall”, Exxon Research and Engineering, Physical Review Letters, Vol. 80, No. 14. (6 April 1998), 3141-3144

Nordtest, “Concrete, fresh: Compactability with ic-tester”, 2012, http://www.nordtest, info 25.3.2013.

INVELOP OY, “Testing Compactability of Low Workable Concrete”, 2009,, 25.3.2013.

Juvas, Klaus, “Några reflexioner om Variax betongteknologin” (Contemplations on the Variax Concrete Technology), OY Partec AB, Finland, 1988.

INVELOP OY, ”Bruksanvisningen för ICT-kompakterings-mätanordning”, modell R8 (Users Handbook for the IC-Tester Model R8], Finland, 1989.

Sørensen, Christian, Zero-Slump Concrete: Rheology, “Degree of Compaction and Strength.Effects of Fillers as Part Cement-Replacement”, Norwegian University of Science and Technology, 1992. ISBN 82-7119-357-0. ISSN 0802-3271.

Bache, H. H., “The Processing of Fresh Concrete”, BFL Report No. 313, Concrete Research Laboratory, Karlstrup, Denmark, 1973.

Bache, H. H., “Densified Cement Ultrafine Particle Based Materials”, Cement- og Betonlaboratoriet, Report No. 40, Aalborg, Denmark, 1981.


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