Journal of Advanced Concrete Technology
Online ISSN : 1347-3913
ISSN-L : 1346-8014
Scientific paper
Development of Compositions of Self-compacting Fine-grained Refractory Concrete
Vladimir KalashnikovPavel KornienkoLarisa GorshkovaGennadiy GakshteterAliya Sarsenbayeva
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2014 Volume 12 Issue 9 Pages 299-309

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Abstract

This paper describes the results of laboratory tests with samples of a new generation self-compacting fine-grained re-fractory concrete (self-flow castables – SFC refractory equivalent to self-compacting concrete – SCC) and tests of the properties of products made of the developed compositions. The tests were conducted with cube specimens 100x100x100 mm in size for developed SFC and prism specimens 40x40x160 mm in size for cement pastes. Laboratory tests were conducted to determine the residual strength after heating to 800℃ and the ability of specimens to withstand sharp changes in temperature from 800℃ to 20℃ in water. A new method for selecting the composition by using main structural-rheological criteria (see section 3.1) was applied: ratio in volume of water-concrete dispersive mixture (rheological matrix of the first kind) over the absolute volume of fine sand SFSCD = VCD / VFS and ratio in volume of dis-persive fine-grained mixture (rheological matrix of the second kind) over the absolute volume in sand-aggregate SSACDFS = (VCDFS+VFS / VSA. It is shown that one of the ways to reduce the negative impact of high temperatures on the physical-mechanical properties of refractory concrete that uses Portland cement is the addition of the three slags com-ponents, that have equal thermal-expansion coefficient, amorphous silica fume of 10-15% of the cement mass. The pro-ject was conducted from February 2012 to February 2013.

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© 2014 by Japan Concrete Institute
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