International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
권호 표지
DOI QR코드

DOI QR Code

Mechanical Properties of Cement Mortar: Development of Structure-Property Relationships

  • Received : 2010.08.10
  • Accepted : 2011.01.24
  • Published : 2011.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords

References

  1. Ghebrab, T. T. and Soroushian, P., "Mechanical Properties of Hydrated Cement Paste: Development of Structure-Property Relationships," International Journal of Concrete Structures and Materials, Vol. 4, No. 1, 2010, pp. 37-43. https://doi.org/10.4334/IJCSM.2010.4.1.037
  2. Dhir, R. K., "Key Features in View of Modeling the Permeability of Concrete," Cement Combinations for Durable Concrete Proceedings of the International Conference Held at the University of Dundee, Scotland UK, 2005, pp. 591-600.
  3. Bisschop, J. and Van Mier, J. G. M., "Quantification of Shrinkage Microcracking in Young Mortar with Fluorescence Light Microscopy and ESEM," Heron, Vol. 44, No.4, 1999, pp. 245-255.
  4. Scrivener, K. L., "Materials Science of Concrete I," Skalny, J. P., Ed., American Ceramic Society, 1989, pp. 127-161.
  5. http://ciks.cbt.nist.gov/garbocz/104ITZ/node1.htm, 2010.
  6. Hsu, T. T. C., Slate, F. O., Sturman, G. M., and Winter, G., "Microcracking of Plain Concrete and the Shape of the Stress- Strain Curve," American Concrete Institute Journal Proceedings, Vol. 60, No. 2, 1963, pp. 209-224.
  7. Mindess, S., Young, J. F., and Darwin, D., Concrete, 2nd Ed., Prentice Hall, Pearson Education, Inc., NJ, 2003, pp. 308-311.
  8. Poon, C. S., Lam, L., and Wong, Y. L., "Effects of Fly Ash and Silica Fume on Interfacial Porosity of Concrete," Journal of Materials in Civil Engineering, Vol. 11, Issue 3, 1999, pp. 197-205. https://doi.org/10.1061/(ASCE)0899-1561(1999)11:3(197)
  9. Mehta, P. K. and Monteiro, P. J. M., Concrete: Microstructure, Properties, and Materials, 2nd Ed., McGraw-Hill Com. Inc., 1993.
  10. Scrivener, K. L., Crumbie, A. K., and Laugesen, P., "The Interfacial Transition Zone between Cement Paste and Aggregate in Concrete," Interface Science, Vol. 12, 2004, pp. 411-421. https://doi.org/10.1023/B:INTS.0000042339.92990.4c
  11. Kliszczewicz, A. and Ajdukiewicz, A., "Differences in Instantaneous Deformability of hs/hpc According to the Kind of Coarse Aggregate," Cement and Concrete Research, Vol. 24, No. 2, 2002, pp. 263-267. https://doi.org/10.1016/S0958-9465(01)00013-0
  12. Ramakrishnan, N. and Arunachalam, V. S., "Effective Elastic Modulus of Porous Solids," Journal of Material Science, Vol. 25, 1990, pp. 3930-3937. https://doi.org/10.1007/BF00582462
  13. Giaccio, G. and Zerbino, R., "Failure Mechanism of Concrete: Combined Effect of Coarse Aggregates and Strength Level," Advanced Cement Based Materials, Vol. 31, 1998, pp 41-48.
  14. Liu J., Mukhopadhyay, A. K., and Zollinger, D. G., "Contribution of Aggregates to the Bonding Performance of Concrete," Paper Submitted to the Transportation Research Board for Presentation and Publication, Washington D.C., 2006.

Cited by

  1. A lattice‐particle approach to determine the RVE size for quasi‐brittle materials vol.30, pp.2, 2013, https://doi.org/10.1108/02644401311304872
  2. Thermo‐hygro‐mechanical meso‐scale analysis of concrete as a viscoelastic‐damaged material vol.30, pp.5, 2013, https://doi.org/10.1108/EC-08-2013-0097
  3. -Activated Hwangtoh Concrete vol.2014, pp.1537-744X, 2014, https://doi.org/10.1155/2014/846805
  4. Multiscale modeling of the effect of the interfacial transition zone on the modulus of elasticity of fiber-reinforced fine concrete vol.55, pp.1, 2015, https://doi.org/10.1007/s00466-014-1081-6
  5. Material Performance and Animal Clinical Studies on Performance-Optimized Hwangtoh Mixed Mortar and Concrete to Evaluate Their Mechanical Properties and Health Benefits vol.8, pp.9, 2015, https://doi.org/10.3390/ma8095306
  6. Mesoscale Characterization of Fracture Properties of Steel Fiber-Reinforced Concrete Using a Lattice–Particle Model vol.10, pp.2, 2017, https://doi.org/10.3390/ma10020207