ASTM C1202:2019 pdf free download – Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride lon Penetration.
10.2.4 Cover exposed face of specimen with an imperineable material such as rubber or plastic sheeting. Place rubber stopper in cell filling hole to restrict moisture movement. Allow sealant o cure in accordance with manufacturer’s instructions.
10.2.5 Rcpcat steps 10.2.2 (or 10.2.3) and 10.2.4 on second half of cell. (Specimen in applied voltage cell now appears as shown in Fig. 4.)
l0.3 Specimen mounting (rubber gasket alternative): Place a 100 mm outside diameter by 75 mm inside diameter by 6mm thick circular vulcanited rubber gasket in each half of the test cell. Insert sample and clamp the two halves of the test cell together to seal.
10.4 Fill the side of the cell containing the top surface of the specimen with 3.0 NaCI solution. (That side of the cell will be connected to the negative terminal of the power supply in 10.5.) Fill the other side of the cell (which will be connected to the positive terminal of the power supply) with 0.3 N NaOI-1 Solution.
10.5 Attach lead wires to cell banana posts. Make electrical connections to voltage application and data readout apparatus as appropriate: far example. for system listed in 7.7.1 — 7.7.5. connect as shown in Fig. 5. Turn power supply on. set to 60.() ± 0.1 V. and record initial current reading. Temperatures of the specimen, applied voltage cell, and solutions shall be 20 to 25°C at the time the test is initiated, that is, when the power supply is turned on.
10.6 During the test, the air temperature around the specinwns shall he maintained in the range of 20 to 25°C.
10.7 Read and record current at least every 30 mm. If a voltmeter is being used in combination with a shunt resistor for the current reading (see Fig. 5), use appropriate scale factors to convert voltage reading to amperes. Each half of the test cell must remain tilled with the appropriate solution for the entire period of the test.
Nin, 9—Uwing the lest, the lcrnperatwc ol the solutions should not he allowed to exceed 90’C in order to as’oid damage to th ccli and to asoid boiling off’ the solutions Although it is not a requirement of the method. the temperature ol the solutions can he monitored with thermocouples installed through the 3-mm senthole in the top of the cell, High temperatures occur only for highly penetrable concretes.