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Evaluation of Capillary Pore Structures in Cement Pastes Using Spatial Point Process Statistics



Title: Evaluation of Capillary Pore Structures in Cement Pastes Using Spatial Point Process Statistics
Author(s): S. Igarashi, Y. Koike
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-108-7
e-ISBN: 978-2-35158-109-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 221 - 228
Total Pages: 8
Nb references: 5
Language: English


Abstract: Coarse capillary pores detected by SEM-BSE image analysis for hardened cement pastes were converted to point patterns. Their spatial distribution was evaluated by point process statistics. Sizes of the original pores were given as marks associated with the points. Regardless of water/cement ratios and curing times, the points for the capillary pores had a clustering tendency compared to Poisson process. In particular, the pores at a low water/cement ratio exhibited a remarkable cluster process at long ages whereas the point density was quite low. The clustering tendency results from limited complimentary space available for capillary pores. Profiles of the spatial functions reflect differences in the evolution of microstructure between the water/cement ratios. Point process statistics is a useful way for understanding the evolution of microstructure in cement pastes quantitatively.


Online publication: 2010-12-02
Publication type : full_text
Public price (Euros): 0.00