Title of article :
Monitoring method for the chloride ion penetration in mortar by a thin-film sensor reacting to chloride ion
Author/Authors :
Park، نويسنده , , Won Jun and Lee، نويسنده , , Hyun-Seok and Joh، نويسنده , , Sung-Hyung and Lee، نويسنده , , Han-Seung، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
8
From page :
403
To page :
410
Abstract :
The depth of chloride ion permeation from a concrete surface can be monitored in reinforced concrete structures. The purpose of this study is to develop and apply a thin-film sensor based on the measurement of changes in electrical resistance of the sensing elements in order to follow the chloride ion penetration in mortar. The proposed thin-film sensors were placed in mortar specimens intrinsically containing chlorides, and mortar specimens impregnated with chloride solutions then subjected to accelerated corrosion in a NaCl solution. For making a film sensor, a screen printer machine was used. Silver (Ag) paste and iron (Fe) powder were coated on the thin-film sensor that reacts to chloride ion in mortar. As a result of experimental testing, the appropriate ratio of Ag to Fe was >1:2. The electrical resistance of the sensors increased with the degree of corrosion behavior of thin-film sensor. The time to the first change in electrical resistance decreased along with the degree of corrosion as the distance from the mortar surface decreased. The proposed thin-film sensors are thus confirmed to be capable of monitoring the depth of chloride permeation in mortar with sufficient accuracy.
Keywords :
Monitoring method , Chloride ion penetration , Mortar , Sensor , Electrical resistance
Journal title :
Construction and Building Materials
Serial Year :
2014
Journal title :
Construction and Building Materials
Record number :
1635886
Link To Document :
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