Diffusion of Multi-Ionic Species in Recycled Aggregate Concrete

Nattapong Damrongwiriyanupap; Yu Chang Liang; Yun Ping Xi

doi:10.4028/www.scientific.net/KEM.477.56

Paper Titles

Durability Improvement of Concrete in the Environment of Compound Salt and Freeze-Thaw Cycles by Incorporating Mineral Additives
p.30

Investigation of Drying Shrinkage of Concrete Prepared with Iron Mine Tailings
p.37

The Experimental Analyses on the Solidified Effect of Heavy Metals in the Ceramsite Calcined by the Composite Materials of Electroplating Sludge and Seabeach Sludge
p.42

Experimental Study on Adaptability of Artifactitious Aggregate with Water-Reducers
p.49

Diffusion of Multi-Ionic Species in Recycled Aggregate Concrete
p.56

Study on Slag-Based Geopolymer Hydration Process
p.67

A.C Impedance Spectrum and Microstructure of Reactive Powder Cementitious Materials with Low w/b
p.72

Study on Effect of Carbonation Curing for Cement Minerals and Clinker
p.79

The Effect of Activators on the Fly Ash-Based Geopolymers
p.85

HomeKey Engineering MaterialsKey Engineering Materials Vol. 477Diffusion of Multi-Ionic Species in Recycled...

Diffusion of Multi-Ionic Species in Recycled Aggregate Concrete

Abstract:

In recent years, recycled aggregate concrete has been used in reinforced concrete structures. Concrete structures exposed to chloride environment often encountera premature deterioration due to corrosion of steel reinforcement. In order to avoid unplanned maintenances or repairs, it is necessary to develop a reliable prediction model for the chloride diffusion in concrete. The basic formulation of the transport theory will be presented first and then its application to Recycled Aggregate Concrete (RAC) will follow. Chloride diffusion in RAC is different from the diffusion in regular concrete, because the material parameters of RAC such as chloride diffusion coefficient are different from those of regular concrete. In this paper, a multi-scale and multi-phase model will be developed to characterize theinternal structure of the recycled aggregate with a layer of residual cement paste on the surface of natural aggregate and another layer of surface treatment material on the surface of the residual cement paste. The multi-scale and multi-phase model will also be used to characterize the chloride diffusion coefficient of RAC. The numerical analysis of the diffusion equations is performed by using finite element method.

You might also be interested in these eBooks

Ecological Environment and Technology of Concrete

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 477)

Pages:

56-64

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.477.56

Citation:

Cite this paper

Online since:

April 2011

Authors:

Nattapong Damrongwiriyanupap, Yu Chang Liang, Yun Ping Xi

Keywords:

Chloride, Concrete, Diffusion, Nernst-Planck Equation, Recycled Aggregate (RA)

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] Jiusu, L., Hanning, X., Yong, Z. (2009) "Influence of coating recycled aggregate surface with pozzolanic powder on properties of recycled aggregate concrete. Construction and Building Materials, 23: 1287-1291.

DOI: 10.1016/j.conbuildmat.2008.07.019

Google Scholar

[2] Meyer, C. (2009) The greening of concrete industry, Cement and Concrete Composites, 31: 601-605.

DOI: 10.1016/j.cemconcomp.2008.12.010

Google Scholar

[3] Xi, Y., and Bazant, Z.P. (1999) Modeling Chloride Penetration in Saturated Concrete, Journal of Materials in Civil Engineering, ASCE, 11(1), 58-65.

Google Scholar

[4] Xi, Y., and Jennings, H.M. (1997) Shrinkage of Cement Paste and Concrete Modeled by a Multiscale Effective Homogeneous Theory, Materials and Structures (RILEM), 30, July, 329-339.

DOI: 10.1007/bf02480683

Google Scholar