Coupled Diffusion of Chloride and Other Ionic Species in Fly Ash Blended Concrete
หัวหน้าโครงการ
:
ณัฐพงศ์ ดำรงวิริยะนุภาพ
ทีมวิจัย
:
ณัฐพงศ์ ดำรงวิริยะนุภาพ
หัวหน้าโครงการ
สุชาติ ลิ่มกตัญญู
นักวิจัยที่ปรึกษา
Yunping Xi
นักวิจัยที่ปรึกษา
วันที่เริ่มโครงการ
:
2 ก.ค. 2555
วัตถุประสงค์
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The purpose of the proposed research is to develop a novel computational model able to provide accurate long-term prediction for multi-ionic components, moisture, and heat transport in fly ash blended concrete structures.
The specific objectives of the proposed project are
" Establish a complete set of governing equations for the multi-components transport processes in fly ash blended concrete. These equations will be based on the existing physical model, the Nernst-Planck equation. One major improvement will be incorporation of the coupling effects between the ions, and between ions and the pore surfaces. Some parameters incorporated in the governing equations for multi-species diffusion in conventional concrete will be modified for fly ash blended concrete such as chloride diffusivity and chloride binding capacity. Another major improvement will be the extension of the model to non-saturated and non-isothermal concrete containing fly ash, i.e. the moisture and heat transport equations will be incorporated.
" Develop multi-scale models for the material parameters involved in the governing equations. The effective material parameters at meso-scale will be determined based on the constituent phases of the microstructure of fly ash blended concrete.
" Develop the coupling parameters accounted for the coupled effects among multi-ions, moisture, and heat transport in the non-saturated and non-isothermal concrete containing fly ash. Theses parameters will be evaluated based on the experimental studies and included in the governing equations.
" Develop numerical algorithms for solving the stochastic transport equations in which the material parameters, initial condition, and boundary conditions are random. The finite element simulation techniques will be employed to analyse the coupled penetration of chloride and other species in fly ash blended concrete structures.
