New pore structure assessment methods for cement paste
Ma H.; Tang S.; Li Z.
Source PublicationJournal of Materials in Civil Engineering
AbstractIn this study, two new approaches for pore structure assessment of cement paste are investigated and compared with mercury intrusion porosimetry (MIP)-based methods. One is based on a status-oriented computer model; the other is based on fractal analysis on the impedance measured by a noncontact impedance measurement system. In the computer model, cement paste microstructure is simulated as a function of cement properties, water-to-cement ratio (w/c), and degree of hydration. With the simulated microstructure, large capillary pores are characterized by image processing. A model developed based on nitrogen adsorption results and physical rules is applied to predict the small capillary pore structure, as a complementation to cover the whole range of capillary pores. In the impedance measurement based approach, fractal dimensions corresponding to specific pore size ranges are determined from the fractal networks and the impedance responses of the material. Then the pore size distribution curves are deduced. The former approach is capable of providing much more realistic representation of the pore structure as compared with the traditional MIP method, while the latter is also considered as a promising method for pore structure assessment, especially in large pore size range.
KeywordCement paste Fractal network Noncontact impedance measurement Pore structure Status-oriented computer model
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Cited Times [WOS]:13   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
AffiliationHong Kong University of Science and Technology
Recommended Citation
GB/T 7714
Ma H.,Tang S.,Li Z.. New pore structure assessment methods for cement paste[J]. Journal of Materials in Civil Engineering,2015,27(2).
APA Ma H.,Tang S.,&Li Z..(2015).New pore structure assessment methods for cement paste.Journal of Materials in Civil Engineering,27(2).
MLA Ma H.,et al."New pore structure assessment methods for cement paste".Journal of Materials in Civil Engineering 27.2(2015).
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