The SMART-CL1 is a Rapid Chloride Ion Permeability Test (RCPT) apparatus as per ASTM C 1202-05 made by people who understand High Performance Concrete. Having conducted hundreds of tests on different concretes, the apparatus has been developed and fine-tuned over a period of 3 years and has been used extensively on prestigious demonstration projects of the HVFAC-project-India to assess the permeability of concrete.
Concretes incorporating fly ash or silica fume are less permeable to deleterious elements and thus are more durable than conventional concretes. The Rapid Chloride ion Permeability Test (RCPT)  was designed to assess the resistance of concrete to the penetration of chloride ions, an indicator of its permeability.

The SMART-CL1 is a  fully self-contained, complete kit as per ASTM C 1202-05  including the following items:
• Plexiglass chambers with conductive brass mesh, terminals and  Steel bolts - 3 pairs.
• Constant voltage power supply with 3 channels.
• 250 mm vacuum dessicator.
• Vacuum pump
• Moisture trap
• Moulds for cylindrical specimens - 3 nos.
• Temperature probe
• Consumables - good for 1 doz. tests
o RTV sealant + gun
o Acrylic sealer + brush
o NaCl
o NaOH 

The concrete cylindrical specimen - 50 mm thk. is first prepared by coating the dry surface with a sealer and then  vacuum conditioning it as per the ASTM codal procedure. Then the saturated specimen is mounted in the Plexiglass chambers, the sealant applied and the reservoirs filled with NaCl & NaOH respectively.The terminals are then connected to the 60 V DC power supply and the current read in mA on the digital readouts every ½ hr. for 6 hrs. The current magnitude depends on the ions passing through the pores of the concrete specimen (including chloride ions), which in turn depend on the permeability of concrete.  The  total charge Q passed in 6 hrs. is calculated as per the formula :

           Q = 900( I0 + 2×I30 + 2×I60 +2×I120 ........+ I360)   

The value is adjusted for specimen diameters other than 95 mm .This charge in coulombs is an indication of the Cl-Ion penetrability as listed below.

  Charge passed (Coulombs)   Chloride ion Penetrability
           > 4000                                         High
              2000 - 4000                             Moderate
              1000 - 2000                             Low
              100 - 1000                               Very low
           < 100                                            Negligible

A spreadsheet software along with recording formats can be provided to calculate Q .
The kit provides an arrangement to test 3 specimens simultaneously as suggested by the ASTM 1202. However arrangement to test any number can be provided on request. The kit is accompanied by a free demonstration cum training of the clients' staff in our laboratory as well as technical support later.

Sample results of this test may be seen at HVFAC-Indian experience
            
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