- Author
- Snyder, K. A. | Wilson, D. N. | Bentz, D. P. | Garboczi, E. J.
- Title
- Effects of Interfacial Zone Percolation on Cement-Based Composite Transport Properties.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD Purdue Univ., West Lafayette, IN
- Book or Conf
- Materials Research Society. Advanced Cementitious Systems: Mechanisms and Properties. Volume 245. December 1-4, 1991, Materials Research Soc., Pittsburgh, PA, Boston, MA, Glasser, F. P.; McCarthy, G. J.; Young, J. F.; Mason, T. O.; Pratt, P. L.; Chen, Y., Editors, 265-270 p., 1991
- Keywords
- cements | transport property | interfacial zone percolation | mortar | portland cement | concretes | experiments | simulation | sand
- Abstract
- In portland cement mortar and concrete, interfacial zones exist around the aggregate particles that have larger pore sizes and pore volumes than the bulk cement paste. If there are enough aggregate particles present, these zones may overlap so as to percolate. A computer simulation model has been developed that can predict this percolation point as a function of interfacial zone thickness, volume fraction of aggregates, and aggregate particle size distribution. The model was used to simulate 1cm³ of mortar, using approximately 10,000 aggregate particles. Results from this model are used to explain recent mercury porosimetry results on mortars having a variety of sand contents. The implications of interfacial zone percolation for the transport properties of mortar and concrete are discussed.