Study on the development of measuring method of diffusion processes of heat, gas and liquid phases in porous media and material contraction

多孔介质中热、气、液相扩散过程及材料收缩测量方法的研究进展

• 批准号: 07505005
• 负责人: TANABE Tada-aki
• 金额: $ 24.9万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07505005/
• 关键词: Difusion; Porous Material; Vapor; Energy level; Laser Sensor; Specimen Cell; 不均質多孔性材料; 水分移動; 温度分布; 拡散方程式; 電子顕微鏡; 水分拡散実験装置; 液相; 拡散係数

The study aims at the development of devices to measure heat transition with gas and liquid migration within the porous media such as concrete material. On the first phase, the development of an apparatus to produce the water vapor which has temperature between 10ﾟC to 80ﾟC,free energy of vapor of arbitrary intensity was tried. After series of trials, the successful maneuvering method of the apparatus was made clear in such a way that the temperature difference between the generating state of the vapor, connecting pipes and the cell in the chamber should be setso that no dewdrops will be made and this control is found to be exceedingly important to produce ideal vapor condition.In the second phase, the development of the sensor to measure the humidity in concrete was tried. The method to measure the currency resistance change between small distance of 1.0 to 2.0mm was tried. Though the high accuracy can not be expected, the humidity measurement with 5% error was attained.In the third atage, the development of measuring method of volume change was tried by laser sensor. In the beginning the error which can not be allowed in the real application was found. With intensive trial, the error reduced to the level of practically usable extent, however, the continued effort to grade up the function is necessary.

本研究的目的是开发测量多孔介质（如混凝土材料）中气体和液体迁移的热传递的装置。在第一阶段，尝试开发一种装置来产生温度在10 ° C至80 ° C之间的水蒸气，并尝试任意强度的蒸气自由能。经过一系列的试验，明确了该装置成功的操纵方法，即控制蒸汽发生状态、连接管和室中小室之间的温差，使之不产生露珠，并发现这种控制对产生理想的蒸汽状态是极其重要的。对混凝土湿度传感器的研制进行了尝试。尝试了在1.0 ~ 2.0mm的小距离内测量流通电阻变化的方法。第三阶段，尝试了用激光传感器测量体积变化的方法，并在此基础上，对体积变化的测量方法进行了改进。一开始就发现了真实的应用中不允许的错误，经过深入的尝试，错误已经减少到了实际可用的程度，但还需要继续努力升级功能。

项目成果

石川 靖晃: "ビンガム流体から固体への遷移過程におけるコンクリートの構成則に関する研究" コンクリート工学年次論文報告集. 17. 627-632 (1995)

Yasuaki Ishikawa：《混凝土从宾汉流体到固体转变过程中的本构规律研究》《混凝土工程年报》17. 627-632 (1995)

Kimata, H.: "Experiment on the migration of liquid in non-saturated mortar" Proceedings of JCI. Vol.18. 591-596 (1996)

Kimata, H.：“非饱和砂浆中液体迁移的实验”JCI 论文集。

木全 博聖: "不飽和コンクリートの気相・液相の移動に関する研究" コンクリート工学年次論文報告集. Vol.17. 1275-1280 (1995)

Hiroyoshi Kimata：“不饱和混凝土中气相和液相的运动研究”混凝土工程年刊，第 17 卷，1275-1280（1995 年）。

伊藤 始: "細骨材中の表面水移動に関する研究" コンクリート工学年次論文報告集. 18(発表予定). (1996)

Hajime Ito：“细骨料中的表面水运动研究”混凝土工程年论文集 18（待发表）。

Kimata,H: "The Mathematical Modeling on the Migration of Liquid and Gas Phases in Non-saturated Concrete" Transactions of the Japan Concrete Institute. Vol.17. 45-52 (1995)

Kimata,H：“非饱和混凝土中液相和气相迁移的数学模型”日本混凝土协会会刊。