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Title: Stability of self-consolidating concrete containing different viscosity modifiers
Authors: Mechaymech, Ahmad
Assaad, Joseph 
Affiliations: Department of Civil and Environmental Engineering 
Keywords: Admixture Compatibility
Viscosity-Enhancing Admixture
Subjects: Rheology
Self-Consolidating concrete
Issue Date: 2019
Part of: Civil engineering infrastructures journal
Volume: 52
Issue: 2
Start page: 245
End page: 263
The main objective of this paper is to assess the effect of different viscosity-enhancing admixture (VEA) types and concentrations on deformability and stability of self-consolidating concrete (SCC). Two polysaccharide-based VEAs, one cellulose-based VEA, and a modified-startch VEA are used in this investigation. Regardless of polymer type, results showed that the incorporation of VEA leads to reduced passing ability represented by higher difference between the slump flow and J-Ring tests. The rheological properties followed an enhancing trend with VEA additions, given the higher degree of association and entanglement of polymer chains that increase resistance to flow. For given VEA dosage of 0.035%, mixtures made with cellulose VEA showed the highest stability levels including deformability and resistance to bleeding and surface settlement. Series of predictive charts are established to predict the changes in SCC stability as a function of rheological properties.
Open URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Civil and Environmental Engineering

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