GENERALIZED LOG-NORMAL DISTRIBUTION OF PORE SIZES IN HYDRATED CEMENT PASTE

PORE SIZE DISTRIBUTIONS OF HARDENED CEMENT PASTES, DETERMINED BY MERCURY POROSIMETRY, ARE SHOWN TO BE GENERALIZED LOG-NORMAL DISTRIBUTIONS BOUNDED BY THE EXISTENCE OF A MAXIMUM BUT NOT A MINIMUM DIAMETER. AN EXCELLENT FIT IS FOUND FOR PASTES OF 0.4 AND 0.6 WATER:CEMENT RATIO AND AGES BETWEEN ONE DAY AND ALMOST ONE YEAR. THE CUMULATIVE DISTRIBUTION IS DESCRIBED IN TERMS OF THREE PARAMETERS: THE LIMITING UPPER BOUND DIAMETER AND TWO PARAMETERS, DESCRIBING THE GEOMETRIC MEAN AND STANDARD DEVIATION, RESPECTIVELY, OF THE GENERALIZED LOG NORMAL DISTRIBUTION. INTRUSION DATA TAKEN AT PRESSURES OF 50,000 PSI, CORRESPONDING TO DIAMETERS OF THE ORDER OF 25 ANGSTROMS, SUBSTANTIATE THE CONCLUSION THAT ALL OF THE PORES INTRUDED BELONG TO A SINGLE PORE SIZE DISTRIBUTION; NO EVIDENCE OF BIMODALITY (I.E., THE EXISTENCE OF A SEPARATE CLASS OF GEL PORES) IS OBSERVED.

• Corporate Authors:

  N/A

  ,   United States 
• Authors:
  • Diamond, S
  • Dolch, W L
• Publication Date: 1972

Media Info

• Pagination: p. 234-44
• Serial:
  • Journal of Colloid and Interface Science
  • Volume: 38
  • Issue Number: 1
  • Publisher: Academic Press Incorporated

Subject/Index Terms

• TRT Terms: Cement paste; Hydrates; Logarithms; Normal distributions; Pores; Porosity
• Uncontrolled Terms: Pores
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00214133
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 5 2003 12:00AM