THE RHEOLOGY OF FRESH PORTLAND CEMENT PASTES

THE FLOW BEHAVIORS OF FRESH PASTES WERE EXAMINED TO TRY TO CORRELATE THE PROPERTIES WITH THE PHYSICOCHEMICAL NATURE OF THE PASTES. RHEOLOGICAL MEASUREMENTS WERE PERFORMED WITH A COAXIAL CYLINDER VISCOMETER AND RPM-TORQUE PLOTS WERE DETERMINED AS A FUNCTION OF SEVERAL VARIABLES. PLOTS WERE MADE WITH INCREASING RPM (UPCURVE) AND DECREASING RPM (DOWNCURVE) AS A FUNCTION OF TORQUE. FROM THESE PLOTS PARAMETERS RELATED TO YIELD VALUES AND PLASTIC VISCOSITY WERE EVALUATED. AMONG THE VARIABLES STUDIED WERE: (1) CHEMICAL COMPOSITIONS OF CEMENTS, (2) MIXING CONDITIONS, (3) SURFACE AREAS OF CEMENTS, AND (4) TEMPERATURE OF HYDRATION. THE DATA SHOWED THAT 3 TYPES OF RHEOLOGICAL BEHAVIOR ARE FREQUENTLY FOUND IN PASTES: (1) ANTITHIXOTROPIC, (2) REVERSIBLE, AND (3) THIXOTROPIC. /PCA/

• Authors:
  • Ish-shalom, M
  • Greenberg, S A
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Chemical composition; Mixing; Pastes; Physicochemical properties; Portland cement; Rheology; Thixotropy; Viscometers
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213595
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 155
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM