HARDENED SLAG-CEMENT PASTES OF VARIOUS POROSITIES III. SURFACE AREA IN RELATION TO PORE STRUCTURE

The total surface areas, total pore volumes, and the distribution of pore surface and pore volume in pores of different sizes were determined on the hardened slag-cement pastes. Adsorption isotherms of four different adsorbates, namely water, methanol, nitrogen and cyclohexane, were used for surface area and pore structure determinations. The results obtained indicated that water can penetrate into the total pore system, namely both the micropores and the wide pores; whereas methanol can measure wide pores and some of the micropores; moreover, nitrogen and cyclohexane molecules tend to measure only wider groups of pores. The indication gained from this result is that the molecular sieve property plays the most significant role in surface area and pore structure determinations of the hardened cement pastes. The polarity of the molecules seems to be important at low relative vapour pressures, and at high pressures it causes expansion of the pastes. /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. 849-857
• Serial:
  • Journal of Applied Chemistry & Biotechnology
  • Volume: 25
  • Issue Number: 11
  • Publisher: Society of Chemical Technology

Subject/Index Terms

• TRT Terms: Adsorption; Cement paste; Chemical composition; Ferromagnetic materials; Magnetic properties; Molecular structure; Molecules; Nitrogen; Pore space; Porosity; Slag; Slag cement; Surfaces; Thermal analysis; Water
• Uncontrolled Terms: Surface area
• Old TRIS Terms: Ferromagnetism
• ITRD Terms: 7154: Adsorption; 4767: Cement paste; 7196: Molecule; 7128: Nitrogen; 5938: Porosity; 4561: Slag; 5937: Structure (physicochem); 6438: Surface; 7152: Thermal analysis; 4355: Water
• Subject Areas: Geotechnology; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00137731
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 13 1977 12:00AM