Fine Aggregates Size Effect on Rheological Behavior of Mortar

잔골재 입자 크기에 따른 모르타르의 레올로지 거동 특성

Lee, Jin Hyun;Kim, Jae Hong;Kim, Myeong Kyu

  • Received : 2015.05.13
  • Accepted : 2015.08.06
  • Published : 2015.08.31


Physical characteristics of aggregates affect the workability and strength of mortar and concrete, which include their fineness ratio, particle size distribution and water absorption. The workability of construction materials decreases if the incorporated fine aggregates show improper size distribution of their particles. This study shows the particle size effect on the rheological behavior of mortar and provides basic information for evaluating its workability. A mini-slump flow test was adopted to evaluate the workability of mortar. In addition, its plastic viscosity and yield stress were measured using a rheometer for building materials. The sand samples were prepared by sieving river sand and sorting out with their particle sizes. As a result, it was observed that the fines less than 0.7 mm increases the yield stress and plastic viscosity of the mortar samples. If the fines are less than 0.34 mm, the water absorption of the fines dominates change on the workability.


Aggregate;Concrete;Mortar;Particle Size;Rheology


  1. Goltermann, P., Johansen, V. and Palbol, L., "Packing of Aggregates: An Alternative Tool to Determine the Optimal Aggregate Mix", ACI Materials Journal, Vol. 94, No. 5, pp. 435-443, 1997. DOI:
  2. Mahmoodzadeh, F. and Chidiac, S. E., "Rheological Models for Predicting Plastic Viscosity and Yield Stress of Fresh Concrete", Cement and Concrete Research, Vol. 49, pp. 1-9., 2013. DOI:
  3. Roussel, N., Lemaitre, A., Flatt, R. J. and Coussot, P., "Steady State Flow of Cement Suspensions: A Micromechanical State of the Art", Cement and Concrete Research, Vol. 40, pp. 77-84, 2010. DOI:
  4. Park, D. H., Noh, M. H. and Park, C. G., "Characterization of Rheology on the Multi-Ingredients Paste Systems Mixed with Mineral Admixtures", Journal of Koren Concrete Institute, Vol. 16, No. 2, pp.241-248, 2004. DOI:
  5. Ferron, R. P., Gregori, A., Sun, Z. and Shah, S.P., "Rheological Method to Evaluate Structural Buildup in Self-Consolidating Concrete Cement Pastes", ACI Materials Journal, Vol. 104, No. 3, pp. 242-250, 2007.
  6. Koehler, E. P. and Fowler, D. W., "Development of a Portable Rheometer for Fresh Portland Cement Concrete", 306 p., International Center for Aggregates Research. Austin, TX, 2004.
  7. Zhou, Z., Solomon, M. J., Scales, P. J., and Boger, D. V., "The Yield Stress of Concentrated Flocculated Suspensions of Size Distributed Particles, Journal of Rheology, Vol. 43, pp. 651-671, 1999. DOI:
  8. Wildemuth, C. R. and Williams, M. C., "Viscosity of Suspensions Modeled with a Shear-Dependent Maximum Packing Fraction", Rheologica Acta, Vol. 23, No. 6, pp. 629-635, 1984. DOI:
  9. Stickel, J. J. and Powel, R. L., "Fluid Mechanics and Rheology of Dense Suspensions, Annual Review of Fluid Mechanics, Vol. 37, pp. 129-149, 2005. DOI:
  10. Khodakov, G. S., "On Suspension Rheology", Theoretical Foundations of Chemical Engineering, Vol. 36, No. 4, pp. 430-439, 2004. DOI:
  11. Bae, S. H., Kim, C. D., and Lee, S. H., "Evaluation on Mix Characteristics of Concrete Using Fine Sand of Nakdong-River", Journal of the Korean Academic Industrial Society, Vo. 14, No. 3, pp. 1481-1488, 2013. DOI:
  12. Lee, S. H., Jung, Y. W., Jang, S. S., Yeo, I. D. and Choi, J. O., "A Study on Improving the Performance of Shale for Application of Aggregate for Concrete", Journal of the Korean Academic Industrial Society, Vol. 14, No. 11, pp. 5915-5922, 2013. DOI:


Supported by : 경남과학기술대학교