Characteristics of slag fine-powder composite cementitious material-cured coastal saline soil

Cement pile as slope support is used in a thermal coal storage and distribution base project in Caofeidian district. Taking into account the potential hazards of cement-cured saline soil, this research concerns a new type of coastal saline soil-curing agent to explore methods to prohibit the hazards of soluble ions in saline soil. On the basis of compressive strength, scanning electron microscopy, energy-dispersive spectrometry, X-ray diffraction analysis and a series of experiments, the strength, water stability, resistance capacity to seawater corrosion, microstructure and hydration products of slag fine-powder composite cementitious material (SM) agent-cured saline soil have been studied. The test results show that the curing agent reacts with Cl − in saline soil and generates a hexagonal plate crystal and needle-like Kuzel’s salt crystal, and thereby the strength of cured soil is increased with the absence of certain potential hazards of saline soil.