Title:
膨張ひずみの測定方法
Document Type and Number:
Japanese Patent JP7461708
Kind Code:
B2
Abstract:
To provide a method that can simply and efficiently measure expansion strain of concrete caused by ASR, DEF, and the like, and an expansion strain measuring device.SOLUTION: An expansion strain measuring method of the present invention at least includes (A) one or more laser displacement meters, (B) a pedestal for placing a specimen for measuring expansion strain, and (C) a positioning jig for the specimen. The method measures expansion strain of the specimen by, after the specimen is placed on the pedestal of an expansion strain measuring device, irradiating a side surface around the specimen with laser using the laser displacement meters and measuring a distance between the laser displacement meters and the side surface around the specimen.SELECTED DRAWING: Figure 4
Inventors:
Takuya Ohno
Yuji Mitani
Yuji Mitani
Application Number:
JP2020060170A
Publication Date:
April 04, 2024
Filing Date:
March 30, 2020
Export Citation:
Assignee:
Taiheiyo Cement Co., Ltd.
International Classes:
G01N33/38; G01B11/16
Domestic Patent References:
| JP2020001983A |
Foreign References:
| CN102621041A |
Other References:
平尾 宙 Hiroshi HIRAO,よくわかる非破壊検査 第5回,プレストレストコンクリート 第47巻第5号 JOURNAL OF PRESTRESSED CONCREAT, JAPAN ,第47巻,社団法人技術協会 渡邉 史夫,2005年
Attorney, Agent or Firm:
Norihiko Arai
Haruta Naoyuki
Haruta Naoyuki