THE EFFECTS OF ADSORPTION OF SUPERPLASTICIZERS ON THE SURFACE OF CEMENT

The effects of different types of superplasticizers in cement-water systems were investigated by microelectrophoresis and uv-absorption techniques. The purpose of the experiments was to investigate any differences in the magnitude of the zeta potential (zp) and in the amount of superplasticizer adsorbed by using sulfonated polymers of different type, naphthalene, melamine, and polystyrene, with the respective molecular weights, mw=15000 g/mole, mw=19500 g/mole and mw=70000 g/mole. The results show that the superplasticizer with the largest molecular weight gives the largest negative zp, and is therefore concluded to have a higher dispersing capability. Uv-absorption results have shown that the superplasticizer with the smallest molecular weight is the most adsorbed. That the polymer which is the least adsorbed gives the highest negative zp can be explained by the diffuse double-layer theory and a model is presented. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Andersen, P J
  • Roy, D M
  • Gaidis, G M
• Publication Date: 1987-9

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 805-813
• Serial:
  • Cement and Concrete Research
  • Volume: 17
  • Issue Number: 5
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Adsorption; Cement; Polymers; Superplasticizers; Ultraviolet radiation
• ITRD Terms: 7154: Adsorption; 4758: Cement; 4725: Plasticizer; 7481: Polymerization; 7369: Sulphonate; 6438: Surface
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00478759
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jan 31 1989 12:00AM