Evaluation of oil and freeze-thaw effects on cement hydration for waste solidification

This study focuses on analyzing the interaction between Portland type I cement and motor oil, and its influence on the hydration of the cement. The Portland type I cement was tested by using a Viscosity meter, a Zeta potential meter and by Fourier Transform infrared spectroscopy (FTIR). The tested samples containing increasing concentration of motor oil were subjected to Viscosity, Zeta potential and Infrared spectroscopy (IR) tests. Ultimate compressive strength (UCS) and Chemical oxygen demand (COD) tests, which signify the leachability of the oil from the cement, are also included. The results show that oil (1) retards hydration, (2) reduces bonding in the cement, and (3) leaches from the hydrated cement.The presence of calcium silicate polymerization, indicated by the appearance of Si-H, CO3-2, and SiO4 -4 after 90 minutes of hydration, shows that cement hydration was inhibited both by oil and by one freeze-thaw cycle. (Abstract shortened by UMI.