Effect of W/CM and High-Range Water-Reducing Admixture on Formwork Pressure and Thixotropy of Self-Consolidating Concrete

The authors assess the effect of water-cement material ratio (w/cm) and high-range water-reducing admixture (HRWRA) on variations of formwork pressure and thixotropy of self-consolidating concrete (SCC). Experiments on SCC were performed using polycarboxylate acid-based, and polynaphthalene sulphonate and polymelamine sulphonate HRWRA. In addition, the degree of thixotropy and its influence on lateral pressure development were assessed by rheological measurements. Conclusions from this study include: that the development of formwork pressure exerted by SCC can be related to thixotropy; the w/cm affects both the lateral pressure and thixotropy of the SCC; that the type of HRWRA has little effect on the maximum initial pressure of any given w/cm; and that the incorporation of a water-reducing agent lessens the rate of build-up in shear strength properties.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Authors:
  • Khayat, Kamal H
  • Assaad, Joseph J
• Publication Date: 2006-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 186-193
• Serial:
  • ACI Materials Journal
  • Volume: 103
  • Issue Number: 3
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Admixtures; Formwork; Fresh concrete; Rheological properties; Self compacting concrete; Shear strength; Sulfonates; Thixotropy; Water cement ratio; Water reducing agents
• Uncontrolled Terms: High-range water reducing admixtures; Lateral pressure; Polycarboxylates
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01031265
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 23 2006 7:58AM