1997 Fiscal Year Final Research Report Summary
Study on the development of measuring method of diffusion processes of heat, gas and liquid phases in porous media and material contraction
| Project/Area Number |
07505005
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
土木材料・力学一般
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| Research Institution | Nagoya University |
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Principal Investigator |
TANABE Tada-aki Nagoya Univ., Civil Eng., Professor, 工学研究科, 教授 (50144118)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIKAWA Yasuaki Meijyo Univ., Civil Eng., Lecture, 理工学部, 講師 (00257651)
OOSHITA Hideki Defense Univ., Civil Eng., Lecturer, 講師 (40253108)
SATO Ryoichi Utsunomiya Univ., Civil Eng., Associate Prof., 工学部, 助教授 (20016702)
MORINO Keizi Aichi Int.of Tech., Civil Eng., Professor, 工学部, 教授 (20064933)
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| Project Period (FY) |
1995 – 1997
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| Keywords | Difusion / Porous Material / Vapor / Energy level / Laser Sensor / Specimen Cell |
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| Research Abstract |
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.
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