NiFe-LDH slag-based composite wave-absorbing cementing material and preparation method thereof

Abstract

The invention belongs to the field of comprehensive utilization of solid waste resources and environmental protection, and provides a NiFe-LDH (layered double hydroxide) slag-based composite wave-absorbing cementing material and a preparation method thereof. The cementing material is prepared from the following raw materials: 300-360 parts of slag; 3-5 parts of NiFe-LDHs; 10-20 parts of magnesium oxide; 2-5 parts of a water reducing agent; 1-2 parts of a defoaming agent; and 100-140 parts of mixing water. The preparation method comprises the following steps: firstly, accurately weighing a defoaming agent and a water reducing agent, adding the defoaming agent and the water reducing agent into mixing water, and stirring to form a uniform mixing water solution; secondly, adding accurately weighed magnesium oxide and NiFe-LDHs into the mixing water solution to obtian a uniformly dispersed mixing water solution; thirdly, adding slag into the mixing water solution, uniformly stirring, pouring prepared slurry into a mold, and scraping off redundant slurry; and finally, maintaining a sample in an air environment, and removing the mold. The production cost is low, the carbon emission in the preparation process is small, and the material has a good absorption effect on electromagnetic waves in the C wave band. The material is good in strength and excellent in electromagnetic wave absorbing performance, and has remarkable innovation and environmental protection significance and engineering application prospects.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste resources and environmental protection, and relates to a composite wave-absorbing gel material through the comprehensive utilization of slag from industrial sources of solid waste resources, in particular to a slag based on layered double hydroxides (LDHs) A base composite wave-absorbing gel material and a preparation method thereof. Background technique [0002] Electromagnetic waves are oscillating particle waves derived and emitted in space by electric and magnetic fields in the same direction and perpendicular to each other. They are electromagnetic fields that propagate in the form of waves and have wave-particle duality, which makes electromagnetic waves not only have reflection, diffraction, resonance and other fluctuations It also has particle characteristics such as thermal effect, photoelectric effect, and Compton effect. In recent years, with the rapid developmen...

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Problems solved by technology

In recent years, the research on using slag and other solid waste resources to prepare cementitious materials instead of cement to prepare building materials is in the ascendant. On the one hand, it can comprehensively utilize solid waste resources and reduce the environmental hazards of solid waste stockpiling. On the other hand, its production cost is low and the production process is unnecessary. Pollution emission, and excellent durability, so solid waste such as slag has gradually been paid attention to in the field of building materials. It is mainly used as an external admixture of cement to prepare concrete. However, the research on using magnesia to excite slag to prepare wave-absorbing coating materials has not been reported.

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