A method comprising: performing with a device an electrical impedance measurement of a plurality of electrical impedance measurements of a predetermined material, the electrical impedance measurement of the plurality of electrical impedance measurements established in dependence upon a characteristic of the predetermined material to be monitored; and determining based upon the electrical impedance measurement of the plurality of electrical impedance measurements a characteristic of the predetermined material, wherein the electrical impedance measurement of the plurality of electrical impedance measurements is adjusted in dependence upon an activation energy established in dependence upon the characteristic of the predetermined material to which the electrical impedance measurement of the plurality of electrical impedance measurements relate and calibration data relating to the predetermined material to which the electrical impedance measurement of the plurality of electrical impedance measurements relate; the predetermined material is concrete; the characteristic of the concrete is at least one of estimation of in-situ compressive strength of the concrete after pouring; prediction of at least one of 7-day, 28-day and 56-day compressive strength of the concrete; detection of at least one of the initial and final setting time of the concrete; assessment of a transport properties of the concrete selected from the group comprising permeability, diffusivity and porosity; a change in the pore solution; and the presence of a crack within the concrete; the electrical impedance is adjusted in dependence upon the temperature at the time of the electrical impedance measurement, the adjustment comprising an activation energy; and the activation energy is selected from a plurality of activation energies, each activation energy associated with the characteristic being determined. performing with a device an electrical impedance measurement of a plurality of electrical impedance measurements of a predetermined material, the electrical impedance measurement of the plurality of electrical impedance measurements established in dependence upon a characteristic of the predetermined material to be monitored; and determining based upon the electrical impedance measurement of the plurality of electrical impedance measurements a characteristic of the predetermined material, wherein the electrical impedance measurement of the plurality of electrical impedance measurements is adjusted in dependence upon an activation energy established in dependence upon the characteristic of the predetermined material to which the electrical impedance measurement of the plurality of electrical impedance measurements relate and calibration data relating to the predetermined material to which the electrical impedance measurement of the plurality of electrical impedance measurements relate; the predetermined material is concrete; the characteristic of the concrete is at least one of estimation of in-situ compressive strength of the concrete after pouring; prediction of at least one of 7-day, 28-day and 56-day compressive strength of the concrete; detection of at least one of the initial and final setting time of the concrete; assessment of a transport properties of the concrete selected from the group comprising permeability, diffusivity and porosity; a change in the pore solution; and the presence of a crack within the concrete; estimation of in-situ compressive strength of the concrete after pouring; prediction of at least one of 7-day, 28-day and 56-day compressive strength of the concrete; detection of at least one of the initial and final setting time of the concrete; assessment of a transport properties of the concrete selected from the group comprising permeability, diffusivity and porosity; a change in the pore solution; and the presence of a crack within the concrete; the electrical impedance is adjusted in dependence upon the temperature at the time of the electrical impedance measurement, the adjustment comprising an activation energy; and the activation energy is selected from a plurality of activation energies, each activation energy associated with the characteristic being determined.