Abstract
Magnesium slag is a kind of solid waste discharged by magnesium alloy related industries in the process of producing magnesium products or their alloys. Its composition is similar to Portland cement clinker, so it has great potential to be used as a new cementing material. In this paper, magnesium slag cementitious material specimens with different fineness were made by imitating the actual production environment. The flexural strength and compressive strength of specimens with different curing ages were tested, and the influence of fineness on them was analyzed. The results show that the fineness has a significant effect on the mechanical properties of pure magnesium slag cementitious materials. Its effect on the early strength is greater than that on the later strength. But the flexural strength and compressive strength will not always increase with the increase of fineness. There is a reasonable range of fineness.
Highlights
With the development of industrial technology and the increase of energy demand, magnesium alloys have been widely used in automotive industry, aerospace industry and electrical communication industry
It can be seen from the figure that the flexural strength of three kinds of fineness pure magnesium slag cementitious materials gradually increases with the increase of curing age
By making pure magnesium slag specimens with different fineness, the influence of fineness on its mechanical properties under natural curing conditions was explored
Summary
With the development of industrial technology and the increase of energy demand, magnesium alloys have been widely used in automotive industry, aerospace industry and electrical communication industry. Magnesium slag is a kind of solid waste discharged by magnesium alloy related industries in the process of producing magnesium products or their alloys. The remaining waste is magnesium slag [1]. Magnesium slag has strong hygroscopicity, easy to make soil salinization, resulting in soil hardening. The powder magnesium slag particles are easy to mix in the air, causing dust pollution. China is rich in available magnesium mineral resources, and the magnesium industry is developing rapidly. With the rapid development of magnesium industry, how to efficiently and reasonably recycle magnesium slag has become an urgent problem
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