Abstract
Identification of corrosiveness in concrete is necessary for evaluation of building strength. In this study, identification of reinforced concrete corrosion has been successfully conducted using laser-induced breakdown spectroscopy (LIBS) method by identification of sodium element as a fingerprint in the sample. Low-power neodymium yttrium aluminum garnet (Nd:YAG) laser was used (1064 nm, 34mJ, 7ns) as an energy source. The laser beam was focused on concrete sample surface which contains different concentration of sodium-chloride (0.1 % - 1%). The experiment was carried out under atmospheric pressure. The sodium emission line at Na I 589.59 nm was successfully detected. Nice linear calibration curve of sodium line in concrete containing different concentration of sodium chloride (NaCl) was made. The linear curve certified that sodium line can be used as a fingerprint for evaluation of concrete strength.
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