| Popis: |
In the course of their small angle x-ray scattering work, Winslow and Diamond also calculated that radius of gyration of the pores. Using its value for a paste, Diamond adopted two models for the average pore: a sphere and a cylinder of equal height and diameter. This model leads to absurd values for the surface area of the paste. Using a cylindrical model, and the radius of gyration plus the hydraulic radius, the present authors calculated for a similar paste the dimensions of the average pore and obtained the values: diameter equals 47.2A, length equals 466A. The number of pores per gram of paste was 2.26 x 10 to the 17th power. The paper also discusses the surface area of hardened paste, and points out the extremely important contributions of Winslow and Diamond to the subject. /Author/ |
