EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF FRESH FOAMED CEMENT PASTE AND MORTAR

Recently in Japan, foamed cement paste and foamed mortar have frequently been used as embankment material on soft ground because of their low unit weight, flowability, and ease of strength control. Conventional uses of these foamed materials include grouting for tunnel voids and for securing pipelines in tunnels. Since each material for foamed cement milk and foamed mortar have a different specific gravity, segregation can occur during mixing, pumping and placing. The mixture proportions of these foamed mixtures is very important, and are usually determined by trial and error. Experiments were carried out on the rheological properties of cement paste, mortar, foamed cement milk and foamed mortar. Compressive strength of these materials were also examined. Obtained results are as follows: (1) Plastic viscosity of foamed cement pastes or mortars are as same as that of cement pastes or mortars. (2) Yield value of foamed mixture decreases with addition of foam less than 30% by volume, and decrease with addition of foam more than 40%. (3) Relation between plastic viscosity and yield value is almost the same as mixtures without foam. (4) Compressive strength of foamed mixtures decreases with increase of foam content, and the tendancy is apparent in lower w/c.

• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Goto, T
  • Yoshino, A
  • NISHIBAYASHI, S
• Conference:
  • Superplasticizers and Other Chemical Admixtures in Concrete. Proceedings Fifth CANMET/ACI International Conference
  • Location: Rome, Italy
  • Date: 1997-10-7 to 1997-10-10
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 321-342

Subject/Index Terms

• TRT Terms: Cement paste; Foaming agents; Mortar; Plastics; Polymers; Resins; Rheological properties; Viscosity; Yield strength
• Uncontrolled Terms: Segregation
• Subject Areas: Bridges and other structures; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00745839
• Record Type: Publication
• Report/Paper Numbers: SP 173-17
• Files: TRIS
• Created Date: Feb 3 1998 12:00AM