Abstract
High concentration of soluble salt in coastal saline soil can dissolve soil particles to some extent. In this paper, the application of slag compound as a curing agent (referred to as SM) for dealing with dissolve collapsibility in saline soil is investigated. This has done through studying dissolve collapsibility characteristic of the soil stabilized by slag compound. The test results approve that the SM improves saline soil’s dissolve collapsibility and can make a soil characterized as collapsible to the one with no dissolve collapsibility. Furthermore, SM decreases dissolve collapsibility after hydration by turning into crystal and gel formation, which improves the strength of soil samples and reduces the associated deformation. On the other hand, SM reacts with the soluble salt in saline soil, which reduces saline soil’s sensibility to water and the associated deformation and therefore lowers the dissolve collapsibility. The study also compared the curing applications of SM, cement and quick lime.SM and cement have been found to have similar impacts on saline soil dissolve collapsibility, whilst SM has been identified as a more economically viable option. Quick lime, however, is shown to have less curing application compared with both SM and cement. Thus, utilizing SM for improving saline soil’s dissolve collapsibility has been proved to not only be technically feasible, but also economically viable.
