Sample development for fractured cement-based s/s research

ABSTRACT: Understanding the long-term contaminant migration performance of cement-based solidification/stabilization (S/S) systems from remediated sites is important for environmental professionals. Environmental loadings have the potential to induce long term microcracking of these systems, which introduces complex contaminant transport relationships between the matrix and the fractures. This paper describes the mix design of a S/S material for fractured system research. The mix design process describes preliminary strength tests on mortar cube size samples. A target mix design from this work is selected to develop a moisture density relationship for the soil-cement mix at different water contents (i.e. water-cement ratios). Results of flexible wall hydraulic conductivity testing of some of the water contents of the soil-cement mix are presented in the context of selection of a diffusion-dominated cement-based s/s mixture for future research.