Rheological properties of concrete using dune sand. (30th May 2018)

• Record Type: Journal Article
• Authors: Park, Sangjun; Lee, Euibae; Ko, Jeongwon; Yoo, Jaekang; Kim, Yongjic
• Is Part Of: Construction & building materials. Volume 172(2018)
• Page Start: 685
• Page End: 695
• Publication Date: 2018-05-30
• Subjects: Rheology -- Plastic viscosity -- Yield stress -- Dune sand -- Crushed sand; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.03.192
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The rheological properties of dune sand concrete were evaluated by concrete rheometer. The lowest plastic viscosity was observed in mixtures with DS/FA ratio of 20%. The lowest yield stress was observed in mixtures with DS/FA ratio of 20% or 40%. The detailed DS/FA ratios which could lead to the lowest plastic viscosity and the lowest yield stress were calculated. The effect factor of aggregate on plastic viscosity could be analyzed. Abstract: In this study, the rheological properties of dune sand (DS) concrete with various DS to fine aggregate (DS/FA) ratios and water contents were experimentally evaluated by using concrete rheometer recently developed. Also the effect of aggregate on the plastic viscosity of concrete was analyzed. As a result, the lowest plastic viscosity was observed in mixtures with DS/FA ratio of 20% and increased as DS/FA ratio increased over 20%. The yield stress decreased as DS/FA ratio increased up to 20% or 40% and increased over those DS/FA ratios. The detailed DS/FA ratio which could lead to the lowest plastic viscosity and the lowest yield stress was calculated by regression. The DS/FA ratios for the lowest plastic viscosity were 33% in W170 mixtures and 28% in W160 mixtures. Also, the DS/FA ratios for the lowest yield stress were 32% in W170 mixtures and 37% in W160 mixtures, respectively. The effect factor of crushed sand (CS) on the plastic viscosity could be calculated the range of 49–57% in comparison with the effect factor of DS, and the range of the effect factor of coarse aggregate (CA) was 2–56%.