GEAR TO TEST CONCRETE Russian patent published in 2003 - IPC

FIELD: civil engineering. SUBSTANCE: invention is related specifically to tests of concrete and to determination of its strength by way of local destruction by pulling special anchor unit with concrete fragment from concrete. Proposed gear includes body with extendible supports and hydraulic cylinder, pump, anchoring fixture, tie-rod with unit to fix anchoring fixture and recording instrument. Gear is supplemented with handwheel, quickly removed washer to fix tie-rod, micrometric nut structurally coupled to tie-rod in zone of unit to fix anchoring fixture. Rod of working piston in hydraulic cylinder is hollow and recording instrument comes in the form of electronic unit incorporating pressure transducer, amplifier, analog-to-digital converter, AND gate, reversible counter, processor, arithmetic logic facility connected in series. Decoder of loading rate and indicator of loading rate are connected in series to first output of arithmetic logic facility to which second output first input of storage of result is connected. Gear also incorporates result decoder and result indicator connected in series, clock pulse generator connected to second input of processor connected with second output to second input of reversible counter, with third output to second input of AND gate, with fourth output to input of permanent storage and with fifth output to first input of on-line storage. Second input of on-line storage is connected to second output of reversible counter, its third input is connected to first output of keyboard connected with second output to third input of processor and with third output to second input of result storage. Output of permanent storage is connected to second input of arithmetic logic facility and to fourth input of processor. Output of on-line storage is connected to third input of arithmetic logic facility and to fifth input of processor. EFFECT: increased precision of tests. 1 dwg