FIELD: building construction manufacture.
SUBSTANCE: device has basis of gadget, punch, support and pressure screw, strength synchronizer and pivot. Clamp is made of two parts which clamp is connected with strength synchronizer. Support has rectangular opening. Sizes of opening relate to sizes of spalling portion of sample as a=1,1*c and b=1.1*d, where a and b are length and width of opening, and c and d are length and width of spalling part of sample.
EFFECT: improved precision of measurement.
2 dwg
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