A critical comparison of mercury porosimetry and capillary condensation pore size distributions of portland cement paste A reply to the discussion by James J. Beaudoin

1972 ◽  
Vol 2 (1) ◽  
pp. 148-151 ◽  
Author(s):  
Sidney Diamond
Keyword(s):  
Portland Cement ◽  
Pore Size ◽  
Cement Paste ◽  
Capillary Condensation ◽  
Mercury Porosimetry ◽  
Size Distributions ◽  
Critical Comparison ◽  
Pore Size Distributions ◽  
Portland Cement Paste

Diffusion and Pore Structure in Portland Cement Pastes Blended with Low Calcium Fly Ash

1985 ◽  
Vol 65 ◽  
Author(s):  
Amitabha Kumar ◽  
Della M. Roy
Keyword(s):  
Fly Ash ◽  
Portland Cement ◽  
Pore Structure ◽  
Pore Size ◽  
Size Distributions ◽  
Cation Diffusion ◽  
Cement Pastes ◽  
Effective Coefficients ◽  
Pore Size Distributions ◽  
Diffusion Rates

ABSTRACTEffective coefficients for the diffusion of Cs+ and Cl− ions accross hardened plates of Portland cement and Portland cement-fly ash blend pastes were measured at 27°, 38° and 60° for samples cured up to 28 d. The porosity and pore size distributions of the same hardened plates were also determined. The fly ash blends show lower anion and cation diffusion rates at higher temperatures, although the porosity is not significantly different from the neat paste. The finer pore size is considered responsible for the slower diffusion in the blends. The electronegative nature of the pore surfaces also contributes to the slower cation diffusion.

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