Casale, Anthony J.. Infrared spectroscopy scanning of concrete admixtures and structural steel paints. Retrieved from https://doi.org/doi:10.7282/T3QV3JHQ
DescriptionThis study evaluated correlation coefficients of concrete admixtures and structural steel paints by performing IR Scans in order to ensure adequate performance of the specimen using ASTM C494-05a specifications. In order to achieve this goal, numerous IR Scans were performed on the specimens from the manufacturer with different batches in order to ensure conformity. These scans were then analyzed and averaged to create a unique correlation coefficient for each admixture and steel paint. The correlation coefficients were used to quantitatively evaluate and interpret IR Scans of job samples. There were 23 of the most commonly used concrete admixtures tested by the NJDOT. These include air-entrainers, accelerators, retarders, water reducers, and other combinations of these agents including corrosion inhibitors. Their correlation coefficients were established by averaging 12 scans total over three different batches, 4 from each batch. In addition to the admixtures, 28 steel paints used by the NJDOT were also tested. These included primary and secondary coats, thin films, and resins. For the structural steel paints, the correlation coefficients were averaged with 6 scans from three different batches, 2 from each batch. In order to validate and establish an acceptance range, job samples were tested and compared to the correlation created. This study also includes the iv effects of drying time on air-entraining admixture’s correlation coefficients and the effects of different KBr types on correlation coefficients.