Validation of electrical conductivity is made by a second reference electrode of {HEAD ~ a dissimilar metal} which is also disposed in {TAIL ~ a container} having a permeable bottom and an electrolyte which permeates the pavement layer and establishes electrical conductivity between the soil and the second reference electrode 
is disposed in
Validation of electrical conductivity is made by a second reference electrode of { HEAD ~ a dissimilar metal } which is also disposed in { TAIL ~ a container } having a permeable bottom and an electrolyte which permeates the pavement layer and establishes electrical conductivity between the soil and the second reference electrode
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH