DocumentCode :
3355006
Title :
A study of the behaviors of cement-based materials subject to freezing
Author :
Zeng, Qiang ; Li, Kefei ; Fen-chong, Teddy ; Dangla, Patrick
Author_Institution :
Civil Eng. Dept., Tsinghua Univ., Beijing, China
fYear :
2010
fDate :
26-28 June 2010
Firstpage :
1611
Lastpage :
1616
Abstract :
The freezing behavior of cement-based materials is studied in this paper. The freezing-related pore structure is investigated, the fundamental relationship between liquid water saturation degree and freezing temperature is established and the material cryo-deformation is given through poroelastic approach. The effective pressure from freezing is divided into contributions of hydraulic pressure by viscous water flow and pore crystallization pressure by phase change as well as the interface factor. The cryo-deformations of air-entrained mortars with different spacing factors are evaluated through the poromechanical model. The results indicate that both thermal contraction and negative liquid pressure dominate the freezing shrinkage of materials, and the hydraulic pressure contributes most to the freezing expansion as spacing factor increasing.
Keywords :
cements (building materials); crystallisation; deformation; elasticity; freezing; shrinkage; air-entrained mortar; cement-based material; freezing behavior; freezing shrinkage; freezing temperature; freezing-related pore structure; hydraulic pressure; liquid water saturation degree; material cryo-deformation; negative liquid pressure; phase change; pore crystallization pressure; poroelastic approach; poromechanical model; spacing factor; thermal contraction; viscous water flow; Building materials; Concrete; Crystalline materials; Crystallization; Ice; Mortar; Phase change materials; Surface cracks; Temperature; Thermodynamics; Deformation; Freezing; Hydraulic pressure; Poroelasticity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Mechanic Automation and Control Engineering (MACE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-7737-1
Type :
conf
DOI :
10.1109/MACE.2010.5535987
Filename :
5535987
Link To Document :
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