HARDENED SLAG-CEMENT PASTES OF VARIOUS POROSITIES II. WATER AND NITROGEN ADSORPTION

Specific surface areas and pore structure studies were carried out on hardened slag-cement pastes. Water and nitrogen adsorption isotherms were measured and the derived parameters were critically compared. Nitrogen areas and total pore volumes were found to be much smaller than water values. For water vapour adsorption, the specific surface areas derived from the adsorption branches are found to be lower than those derived from the resorption isotherms. Some evidence is presented in this paper that the surface area values derived along the adsorption branches are underestimated values, and that the resorption values might be considered to be nearer to the actual areas of the various pastes. Calculations of the hydraulic radii refute the hypothesis that the areas inaccessible to nitrogen are interlayer areas. /Author/ /TRRL/

• Corporate Authors:

  SOCIETY OF CHEMICAL INDUSTRY

  14 BELGRAVE SQUARE
  LONDON,   United Kingdom  SW1X 8PS
• Authors:
  • Mikhail, R S
  • Abo-EL-Enein, S A
  • Abd-el-Khalik, M
• Publication Date: 1975-11

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 835-847
• Serial:
  • Journal of Applied Chemistry & Biotechnology
  • Volume: 25
  • Issue Number: 1
  • Publisher: Society of Chemical Technology

Subject/Index Terms

• TRT Terms: Adsorption; Cement paste; Nitrogen; Pore space; Porosity; Slag; Slag cement; Surfaces; Thermal analysis; Water
• Uncontrolled Terms: Surface area
• ITRD Terms: 7154: Adsorption; 4767: Cement paste; 7128: Nitrogen; 5938: Porosity; 4561: Slag; 7152: Thermal analysis; 4355: Water
• Subject Areas: Geotechnology; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00137732
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 13 1977 12:00AM