The Pro
mpt Ga
mma Neutron Activation Analysis technique was used to
measure the concentration of chloride in the blast furnace slag (BFS) ce
ment concrete to assess the possibility of reinforce
ment corrosion. The experi
mental setup was opti
mized using Monte Carlo calculations. The BFS concrete speci
mens containing 0.8–3.5 wt. % chloride were prepared and the concentration of chlorine was evaluated by deter
mining the yield of 6.11, 6.62, 7.41, 7.79 and 8.58 MeV ga
mma-rays.
The Minimum Detectable Concentration (MDC) of chlorine in the BFS cement concrete was estimated. The best value of MDC limit of chlorine in the BFS cement concrete was found to be 0.034 ± 0.011 and 0.038 ± 0.012 wt. % for 6.11 and 6.62 MeV prompt gamma-rays. Within the statistical uncertainty the lower bound of the measured MDC of chlorine in the BFS cement concrete meets the maximum permissible limit of 0.03 wt. % of chloride set by the American Concrete Institute.