Mathematical modeling and numerical study of carbonation in porous concrete materials. (English) Zbl 1410.74021
Summary: In this paper, a mathematical model of carbonation process in porous concrete materials is proposed. Based on physio-chemical mechanisms, the whole process can be viewed as the multi-component flow coupled the carbon dioxide-moisture-calcium ion transport. The rate of calcium hydroxide dissolution and mass equations are modified to get better descriptions on the physical conservation. An uncoupled finite volume method is proposed to solve the nonlinear parabolic system. Numerical simulations under the normal carbonation condition and the accelerated carbonation condition are presented and analyzed, respectively.
MSC:
| 74F10 | Fluid-solid interactions (including aero- and hydro-elasticity, porosity, etc.) |
| 76V05 | Reaction effects in flows |
| 76S05 | Flows in porous media; filtration; seepage |
| 74S10 | Finite volume methods applied to problems in solid mechanics |
| 76M12 | Finite volume methods applied to problems in fluid mechanics |
Keywords:
carbon dioxide-moisture-calcium ion transport; multi-component flow; mass conservation; calcium hydroxide dissolution; uncoupled finite volume method; carbonation depthReferences:
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