Effect of Water-Powder Ratio on Shear Deformation Behavior of Self-compacting Concrete (SCC)
LI Huajian
HUANG Fali
CHENG Guanzhi
YI Zhonglai
ZHANG Yong
WANG Zhen
XIE Yongjiang
Abstract：The rheological curves of powder-viscosity modifier admixture(VMA) combination type self-compacting concrete(SCC) with different water-powder ratios were determined by means of RHM-3000 ICAR rheometer.The data obtained were modeled by the Bingham model,Herschel-Bulkley(H-B) model and modified Bingham model respectively.The results indicate that the yield stress increases with increasing water-powder ratio of the SCC with the same slump-flow and air content,while the opposite is true for the plastic viscosity.The increasing water-powder ratio can weaken the shear thickening behavior.When the water-powder ratio increases to 0.40 (by mass),the shear thickening phenomenon completely disappears,showing a shear thinning behavior.Both H-B model and modified Bingham model can describe the shear thickening behavior of SCC,and the c/μ of modified Bingham model is more sensitive to shear deformation.
Keywords：water-powder ratioself-compacting concreterheological modelshear deformation
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 30-35 )