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자료유형
학술저널
저자정보
Tewodros Tekeste Ghebrab (Texas Tech University) Parviz Soroushian (Michigan State University)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.5 No.1
발행연도
2011.6
수록면
3 - 10 (8page)

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Theoretical models for prediction of the mechanical properties of cement mortar are developed based on the morphology and interactions of cement hydration products, capillary pores and microcracks. The models account for intermolecular interactions involving the nano-scale calcium silicate hydrate (C-S-H) constituents of hydration products, and consider the effects of capillary pores as well as the microcracks within the hydrated cement paste and at the interfacial transition zone (ITZ). Cement mortar was modeled as a three-phase material composed of hydrated cement paste, fine aggregates and ITZ. The Hashin’s bound model was used to predict the elastic modulus of mortar as a three-phase composite. Theoretical evaluation of fracture toughness indicated that the frictional pullout of fine aggregates makes major contribution to the fracture energy of cement mortar. Linear fracture mechanics principles were used to model the tensile strength of mortar. The predictions of theoretical models compared reasonably with empirical values.

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Abstract
1. Introduction
2. Modulus of elasticity of cement mortar
3. Sensitivity analysis of the effect of the fineaggregate elastic modulus on the modulus ofelasticity of cement mortar
4. Mechanistic model for the fracturetoughness of cement mortar
5. Energy released during debonding of sandparticles from hydrated cement paste
6. Energy released during pull-out of sandparticles from hydrated cement paste
7. Tensile strength model of cement mortar
8. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2014-530-002799657