Modelling Pore Structure of Cement Based Material According to Continuous Network System

Abstract:

In this study, a modified pore structure of cement based material with respect to a path for ingressive ions was established. Of pores in a concrete, gel pores and other entrapped air voids were excluded from modelling the pore structure as no interests are given due to the ions immobilization of cement paste media. To setup the pore structure, the linear traverse method (LTM) was used to distribute air voids along the traverse line in a hexahedron cement paste structure, followed by including entrained air voids to fill up the least space of the cement matrix and making a network of the air voids through capillary pores at the variation in the diameters. Then the mercury intrusion porosimetry (MIP) was used to iteratively approach an accordance rate with calculated one from the above way to get into appropriate convergence value. As a result, for the OPC specimen the developed model shows a somewhat relevant value of 42.4 % of the accordance rate compared to empirical one and 64.24 of the ratio of ionic path to original distance within a concrete.

• Periodical: Applied Mechanics and Materials (Volumes 578-579)
• Pages: 1531-1537
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.578-579.1531
• Online since: July 2014
• Authors: Sung In Hong, Joon Woo Park, Young Hee Jung, Ki Yong Ann*
• Keywords: Capillary Pores, Compatibility, Entrained Air Voids, Entrapped Air Voids, Gel Pores, LTM, MIP, Pore Structure

References

[1] H.W. Songand S.J. Kwon, Evaluation of chloride penetration in high perfomance concrete suding neural network algorithm and micro pore structure, Cement and Concrete Research, Vol. 39 (2009), pp.814-824.

DOI: 10.1016/j.cemconres.2009.05.013

[2] H.W. Song and S.J. Kwon, Permeability characteristics of carbonated concrete considering capillary pore structure, Cement and Concrete Research, Vol. 37 (2007), pp.909-915.

DOI: 10.1016/j.cemconres.2007.03.011

[3] K. Maekawa, T. Ishida and T. Kishi, Multi-scale modeling of concrete performance, Journal of Advanced Concrete Technology, Vol. 1 (2003), pp.91-126.

DOI: 10.3151/jact.1.91

[4] N. G, Lokman, Studying air properies in hardened Portland cement concrete with linear traverse method, Master. Thesis, University of Louisville, Louisville (2009).

DOI: 10.18297/etd/1053

[5] J. Frank and Jr. Massey: The Kolmogorov-smirnov test for goodness of fit (American Statistical Association, UAS 1951).

[6] K. Aligizaki, in: Pore Structure of cement-based materials testing, interpretation and requirements, Modern Concrete Technology 12, 3CRC Press (2006), in press.

[7] information on http: /www3. imerial. ac. uk/concretedurability/researchprojects.

[8] G. K, Glass and N. R, Buenfeld, Chloride-induced corrosion of steel in concrete, Progress in Structural Engineering and materials, Vol. 2 (2000), pp.448-458.

DOI: 10.1002/pse.54

[9] Z, Liu and D, Winslow, Sub-Distributions of pore size: a new approach to correlate pore structure with peameability, Cement and Concrete Research, Vol. 25 (1994), pp.769-778.

DOI: 10.1016/0008-8846(95)00067-m

[10] R. F, Feldman, Pore structure damage in blended cements caused by mercury intrusion, Journal of the American Ceramic Society, Vol. 67 (2006), pp.30-33.

DOI: 10.1111/j.1151-2916.1984.tb19142.x

[11] O. J, Clyde, Application of mercury penetration to materials analysis, Powder Technology, Vol. 3 (1970), pp.117-123.

[12] S, Lowell, Continuous scan mercury porosimetry and the pore potential as a factor in porosimetry hysteresis, Powder Technology, Vol. 25 (1980), pp.37-43.

DOI: 10.1016/0032-5910(80)87006-9

[13] H.W. Song, S.W. pack and K.Y. Ann, probabilistic assessment to predict the time to corrosion of steel in reinforced concrete tunnel box exposed to sea water, Construction and Building Materials, Vol. 23 (2009), pp.3270-3278.

DOI: 10.1016/j.conbuildmat.2009.05.007