Methodologies Of PSD Measurements In HCP : Postulates, Peculiarities, And Problems

1988 ◽  
Vol 137 ◽  
Author(s):  
Sidney Diamond
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Cement Paste ◽  
Hardened Cement ◽  
Hardened Cement Paste

AbstractA brief discussion is presented of some of the characteristics of hardened cement paste (hcp) and hcp in concrete that bear on the measurement of pore size distribution. The postulates underlying several present and potential measurements are discussed individually, and an attempt is made to assess the applicability of each in light of the peculiar characteristics of hcp. Some of the problems inherent in each procedure are briefly described.

scholarly journals EARLY AGE POROSITY AND PORE SIZE DISTRIBUTION OF CEMENT PASTE WITH FLUE GAS DESULPHURISATION (FGD) WASTE

2013 ◽  
Vol 19 (5) ◽  
pp. 622-627 ◽  
Author(s):  
Jamal M. Khatib ◽  
Pritpal S. Mangat ◽  
Lee Wright
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Cement Paste ◽  
Flue Gas ◽  
Early Stage ◽  
Early Age ◽  
Cement Pastes ◽  
Binder Ratio ◽  
Water To Binder Ratio

This paper is part of a wide-ranging investigation on the use of flue gas desulphurisation (FGD) waste in cement-based materials. It reports the results on the porosity and pore size distribution of cement paste containing varying amounts of simulated FGD waste. The water to binder ratio was 0.5. The binder consists of cement and simulated FGD. The FGD is a combination of fly ash and gypsum ranging from 0% to 100%. Cement in the pastes was partially replaced with 25% FGD (by weight). The porosity and pore size distribution of cement pastes was determined during the early stage of hydration. Increasing the amount of gypsum does not increase the pore volume. However, increasing the amount of gypsum in the paste leads to an increase in the threshold diameter and a decrease in the percentage of small pores in the paste, both indicating a coarser pore structure. The results of this investigation were compared with data at longer curing periods.

Influence of Cement Particle Size Distribution on Strength of Hardened Cement Paste

2011 ◽  
Vol 477 ◽  
pp. 118-124
Author(s):  
Bao Lin Zhu ◽  
Xin Huang ◽  
Ye Guo
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Cement Paste ◽  
Solid Phase ◽  
Hardened Cement ◽  
Cement Particle ◽  
Hardened Cement Paste ◽  
Effect Of Particle Size ◽  
Continuous Particle

On the basis of the principle for the highest filling degree of cement hydrates, it is synthetically considered that a matching connection between hydration of cement, volume increment of solid phase and packing density of cement paste, a calculation method for a connection between cement continuous particle size distribution and strength of hardened cement paste is developed and tested by experiment. Based on above-mentioned analysis, a tentative research on the effect of particle size distribution of cement on strength is carried out.

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