发明名称 |
CONCRETE EMBEDDED TYPE STRAIN GAGE AND METHOD FOR MEASURING STRAIN OF CONCRETE |
摘要 |
PROBLEM TO BE SOLVED: To provide a strain gage capable of measuring the self-contracting behavior of concrete just after the cement material is placed and useful for making clear the mechanism of a cracking phenomenon of the concrete caused by the self-contraction, for controlling cracking, and for performing design. SOLUTION: This strain gage 4 is formed as a thin-walled oblong parallelepiped molding 3 by air-tightly coating the whole of a strain gage element 1 and the proximity of a connection part between the gage element 1 and lead wires 2 with a low-elasticity silicone resin. The gage 4 is embedded in just-mixed concrete to be measured and the lead wires 2 are connected to a strain measuring instrument. The gage element 1 in the molding 3 embedded in the concrete varies in resistance value due to its self-contracting behavior while the just- placed concrete in a flowable state becomes hard. The resistance value is measured by the measuring instrument and converted into displacement.
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申请公布号 |
JP2001324302(A) |
申请公布日期 |
2001.11.22 |
申请号 |
JP20000142449 |
申请日期 |
2000.05.15 |
申请人 |
KYOWA ELECTRON INSTR CO LTD;HOKKAIDO TECHNOLOGY LICENCE OFFICE CO LTD |
发明人 |
NAWA TOYOHARU;YAMAURA YOSHIRO |
分类号 |
G01L1/00;G01B7/16;G01N33/38;(IPC1-7):G01B7/16 |
主分类号 |
G01L1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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