| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete shrinkage crack test apparatus capable of adjusting and measuring a strain and a stress varying with elapse of time after concrete is deposited while following the variation thereof. SOLUTION: This concrete shrinkage crack test apparatus 1 comprises an apparatus body having a load applying means 5 applying a load to a concrete specimen 2, a stress measuring means 6 capable of measuring a stress occurred in the specimen, a strain measuring means 7 capable of measuring the strain of the specimen 2, and a holding frame 8 fixing the load applying means 5, the stress measuring means 5, and the strain measuring means 7 together with the specimen 2 and a control device 4 connected to the stress measuring means 6 and the strain measuring means 7 and controlling output values from the load applying means 5 according to the stress values produced in the specimen 2 or the strain values of the specimen 2. The strain measuring means 7 is installed on the outer side of the specimen 2. COPYRIGHT: (C)2004,JPO
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