Estimation of minimum detectable concentration of chlorine in the blast furnace slag cement concrete

作者：Naqvi A A^*; Maslehuddin M; Garwan M A; Nagadi M M; Al Amoudi O S B; Khateeb ur Rehman; Raashid M

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2011, 269(1): 1-6.

DOI：10.1016/j.nimb.2010.10.006

• PGNAA technique
• Blast furnace slag cement concrete samples
• Corrosion analysis
• Chlorine concentration measurements
• 2.8 MeV neutrons
• Chlorine minimum detectable concentration limit calculation
• Monte Carlo simulation

The Prompt Gamma Neutron Activation Analysis technique was used to measure the concentration of chloride in the blast furnace slag (BFS) cement concrete to assess the possibility of reinforcement corrosion. The experimental setup was optimized using Monte Carlo calculations. The BFS concrete specimens containing 0.8-3.5 wt.% chloride were prepared and the concentration of chlorine was evaluated by determining the yield of 6.11, 6.62, 7.41, 7.79 and 8.58 MeV gamma-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.

• 出版日期2011-1-1
• 单位中国石油大学（北京）