Method for non-destructive comparative evaluation of the contents of steel reinforcements scattered in concrete, by the method of electrochemical impedance spectroscopy

摘要

The lack of a comparative assessment of the content of steel reinforcement dispersed in concrete,with reciprocal access to two parallel surfaces of the fibrobethane component tested, it consists of:that the surface (1) is strongly moistened with water and placed at the selected measuring point with an auxiliary electrode (2) and a reference electrode (3),and on the second surface (4) of fibrobethane, a working electrode (5) is placed,with a co -axial three -electrode working electrode (5),the reference electrode (3) and the auxiliary electrode (2) are connected to the potentiostat (6),and then perform an impedance measurement in a potentiodynamic mode for the frequency 100 Hz 100 kHz,giving a sinusoidal disturbance signal of 10 -20 -mV amplitude relative to the working electrode potential (5),the three -electrode system is then moved to another measuring point II of the test fibrobethane component and repeats the measurement of impedance at unchanged settings,and on the basis of a comparative analysis of both triangular systems tested,one of the two quassium layouts of the impedance module tilted at a greater angle,from compartment one to 45,the measurement frequency axis is characterised by a measurement point (I or II) with a higher content of steel fibres in fibrobethane volume between the auxiliary electrode (2) and the operating electrode (5).