偏微分方程式セミナー(2015/6/22): A mathematical model describing concrete carbonation process, 熊崎 耕太 氏

開催日時
2015年   6月 22日 16時 30分 ~ 2015年   6月 22日 17時 30分
場所
北海道大学理学部3号館3-309室
講演者
熊崎 耕太 氏 (苫小牧高専)
 
Carbonation of concrete is known as a phenomenon which gives a serious effect to the durability of concrete. The outline of carbonation process can be described as follows: The gaseous carbon dioxide from the atmosphere enters the porous structure of concrete-based materials via the air parts of the pore where it quickly dissolves in pore water. In the pore water, carbon dioxide dissolved in water reacts fast with available alkaline species, and generates calcium carbonate(precipitation) and the liquid of water. As a result, the alkalinity of concrete changes into acidity. Our aim is to construct and analyze a mathematical model for a mechanism of concrete carbonation process.

Recently, we proposed a mathematical model describing concrete carbonation process in three dimensional case. This model consists of moisture transport and carbon dioxide transport. Moisture transport is described as a quasilinear parabolic equation with a hysteresis effect between the relative humidity and the degree of saturation, and carbon dioxide transport is a parabolic equation considered the concentration of carbon dioxide in air and in water. In this talk, we give the existence and uniqueness of a time global solution for an initial and boundary value problem of this model.

関連項目

研究集会・セミナー・集中講義の一覧へ