Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 84, Issue -, Pages 103-110Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.03.061
Keywords
Silica-fume; VMA; Rheology; Viscosity; Strength; Performance
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The apparition of a wide generation of mineral powders industrially mastered (like silica fume and limestone filler) and organic products (particularly the superplasticizers and viscosity modifying agent) increases significantly the range of concrete rheological performance. This experimental study is built around the characterization of the effect of viscosity modifying agent (VMA) and silica fume on the rheological and mechanical properties of self compacting concrete. The aim is to find the percentage of silica fume and of VMA that allow to obtain the same mechanical and rheological characteristics. The used rheological tests are the slump flow, V-funnel, L-Box, sieve segregation test, and measurement of the yield stress and viscosity. The mechanical tests are the compressive strength, flexural strength and modulus of elasticity. In this study, we show the role of the VMA and silica fume for the stability and robustness of the concrete. Our experimental results show that, depending on the availability of materials, we can replace the viscosity modifying agent by silica fume and vice versa. (C) 2015 Elsevier Ltd. All rights reserved.
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