Analysis of Basic Physical and Chemical Characteristics of Manganese Slag before and after Solidification and Its Feasibility as Highway Slope

Abstract

Manganese slag is a kind of industrial waste produced by electrolytic production of manganese metal. The traditional method of stacking manganese slag not only causes waste of resources, but also produces environmental pollution. Finding harmless, effective, and economical disposal technology of manganese slag has gradually become a research hotspot and difficulty in the field of electrolytic manganese industry and environmental protection. To verify the feasibility of using manganese slag as roadbed material, the basic physical and chemical properties of manganese slag were analyzed based on X-ray diffraction, X-ray fluorescence spectrum, SEM scanning electron microscope, and particle analysis, the basic engineering characteristics of raw materials of manganese slag and solidified manganese slag mixed with quicklime were analyzed through a compaction test and a CBR test. Finally, based on the Monte Carlo method, the stability of a highway slope in the Guizhou Province of China is simulated by the finite element method, considering the spatial variability of manganese slag material strength parameters. The results show that the solidified manganese slag material can be used as highway subgrade material. This study has important reference significance for manganese slag highway construction projects.

The Properties of Normal Concrete with Ground Manganese Slag as Binder Replacement

“…As a result, storage of these wastes have become an issue with substantial amount of waste pilling up on the premises of the factories. According to Chen et al, [8], manganese slag comprises of harmful heavy metals and will produce excessive sulphate and ammonia nitrogen that can potentially pollute the surrounding environment and harm the aquatic ecosystem and agriculture system. Therefore, a proper disposal method of the industrial waste residue is vital to ensure the safety of the environment in this region.…”