NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION

Many agencies have adopted the standard tests for electrical indication of concrete’s ability to resist chloride ion penetration (AASHTO T 277 and ASTM C1202), commonly known as the rapid chloride permeability test (RCPT), in their specifications for qualification and acceptance and as a means of indirectly assessing the permeability of concrete mixtures. (See references 1–5.) Nevertheless, the RCPT is labor-intensive and costly and presents high variability.(3,6,7) Research studies have shown that the surface resistivity (SR) test (AASHTO TP 95) is a promising alternative to the RCPT. (See references 3, 6, 8, and 9.) Recently, some agencies have shown interest in replacing the RCPT with the SR test and have started implementation efforts.(3,8) However, none of the studies have included high-volume fly ash (HVFA) mixtures or mixtures containing fly ash and fine limestone powder.

US Transportation Collection
Federal Highway Administration