FIELD: measurement.
SUBSTANCE: invention relates to investigation of strength properties of concrete and can be used to control strength of concrete structures. Determination of strength is carried out by force of dipped dowel-nail withdrawal from tested concrete, at that, or dowel-nail is immersed with grip for gripping in area of cap of dowel-nailing pulling device, or removing a portion of the tested concrete in an amount required for the dowel-nail to be gripped in the area of the cap by a pull-out device.
EFFECT: high information value when determining strength of concrete and reduced time (labor costs) for determining strength of concrete.
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