Rapid chloride permeability test

Table 10. Results of Rapid Chloride Permeability Test of RPUMRPE and HRPE...

To determine the resistance of concrete to the penetration of chloride ion, the rapid chloride permeability test (RCPT) was conducted according to ASTM Cl202 standard (2012). The specimens from each series were tested at after 28 and 90 days of curing. After curing, the 100-mm diameter and 50-mm thick concrete specimens were conditioned according to the standard, placed on the cells, and... 

By adding polymer dispersions and thereby decreasing the permeability, a further reduction of the chloride migration coefficient can be achieved. The rapid chloride migration test is a quick tool to test the chloride resistance by applying a voltage [1]. In relation to the depth of cover, the risk for corrosion of the steel surface can be estimated in terms of time. 

When polyurethane was polymerized in the presence of moisture, some expansion is inevitable. In order to investigate the influence of foam on permeability a rapid chloride ion permeability test was conducted in accordance with AASHTO T-277. Three resin systems RPUMRPE-1, RPUMRPE-2, and HRPE were used. The permeability results of 12 slices are shown in Table 8. It can be seen that every specimen is impermeable. After 6 hours, the permeabilities were the same as at the beginning. Although RPUMRPE-2 contains more isocyanate compound and more expansion than RPUMRPE-1, it still had excellent impermeability which means the pores are closed, and the water cannot pass through. 

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