Giatec Surf™ is a laboratory test device for rapid, easy and accurate measurement of the surface electrical resistivity of concrete based on the four-probe (Wenner-Array) technique according to AASHTO TP 95-11, and ASTM. Surf™ has a unique and customized setup, which enables the measurement of electrical resistivity with high accuracy by reducing the duration of test and minimizing the ambient effects.
The patented technology automatically measures resistivity around the concrete specimen using four channels of 4-probe array (located at 90° from each other). The PC software generates the required reports according to the standard specifications. The measurements can be used to estimate the resistance to the penetration of chloride ions in concrete. The qualitative relation between rapid chloride penetrability test, RCPT (ASTM C1202), and the surface electrical resistivity of concrete is presented in Table 1.
|Chloride Penetration||56-Day Rapid Chloride
Permeability Charge Passed as
per ASTM C1202 (Coulombs)
|Surface Resistivity @ 23 °C (kΩ.cm)|
Surf™ is a laboratory device for measuring the surface electrical resistivity of concrete samples or concrete cores. This technique can be utilized for various applications such as: