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contributor authorNv Cheng
contributor authorBiao Wu
contributor authorXiaowen Chen
contributor authorDongwei Hou
date accessioned2023-11-27T23:46:09Z
date available2023-11-27T23:46:09Z
date issued6/19/2023 12:00:00 AM
date issued2023-06-19
identifier otherJMCEE7.MTENG-15431.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4293827
description abstractPore structures are critical for most properties of cementitious materials. To describe the initial pore structure of fresh cement paste, which is the foundation of the evolution of a pore network induced by hydration of cement particles in hardened concrete, statistical modelling of pore structure is carried out based on a concentric-shell sphere model, by taking cement paste as a random two-phase media. Calculations by the dispersion models agree well with the pore size distributions tested by the low-field H1 nuclear magnetic resonance (NMR) technique. For cement paste that disperses completely with the help of a dispersant, a hard sphere model is practical. However, in most real conditions, an agglomeration of cement particles will occur both before and after mixing with water, which can be characterized by the redistribution of pore size determined by the critical grain size and the hardness parameter in the concentric-shell model, respectively. Calculation results suggest that agglomeration of particles leads to coarser pores. This work will promote the understanding of the formation mechanisms of pore networks and further offers a foundation for modelling the evolution of pore structures in cementitious materials.
publisherASCE
titleStatistical Modeling of Pore Structures in Fresh Cement Paste Based on Dispersion Theory of Random Two-Phase Media
typeJournal Article
journal volume35
journal issue9
journal titleJournal of Materials in Civil Engineering
identifier doi10.1061/JMCEE7.MTENG-15431
journal fristpage04023289-1
journal lastpage04023289-11
page11
treeJournal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 009
contenttypeFulltext


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