High-strength nano solid waste concrete prepared from iron oxide hollow spheres and method thereof

Abstract

The invention provides high-strength nano solid waste concrete prepared from iron oxide hollow spheres and a method thereof, and the concrete comprises the following components: 100 parts of a cementing material, 155-196 parts of coarse aggregate, 132-282 parts of fine aggregate, 2.2-2.8 parts of a high efficiency water reducing agent, an admixture mainly composed of 2-5 parts of nanometer wollastonite powder, 2-5 parts of iron oxide hollow spheres, 1-4 parts of converter secondary dedusting ash, 10-25 parts of cold rolling waste emulsion, 0.0125-0.025 part of sodium sulfate, 0.00625-0.0125 part of iron oxide powder and 0.0125-0.025 part of ethylene glycol, and 29-32 parts of water. The preparation method comprises the following steps: mixing the coarse aggregate and the fine aggregate, adding the cementing material, conducting mixing, adding the high-efficiency water reducing agent and the make-up water, conducting mixing, conducting stirring, injecting the formed mixture into a concrete transport vehicle, and adding the converter digested secondary dedusting ash and the dispersed nanometer wollastonite powder before or simultaneously adding the water reducing agent and the make-up water. Dispersion of the nanometer material is promoted through the iron oxide hollow spheres, the strength of the nanometer solid waste concrete is improved, the mixing amount of metallurgical solid waste in the concrete is larger than or equal to 75%, and high-value utilization of the metallurgical solid waste is achieved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a method for preparing high-strength nano solid waste concrete by utilizing iron oxide hollow spheres. Background technique [0002] In recent years, researchers have continuously explored the method of adding nanomaterials to modify concrete, and found that the improvement of nanomaterials to concrete mechanics and durability is mainly due to the promotion of hydration, which makes the hydration products uniform, crystallized and dense, and improves the concrete. Mechanisms such as reducing the porosity and refining the micro-cracks under load. Using nano-assembly technology, nano-materials are grown or grafted onto micron-scale mineral admixtures and fibers to form micro-nano multi-scale materials. On the one hand, it can solve the problem that nano-materials can still be uniformly dispersed in concrete under a large amount, and on the other hand. On the one hand,...

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Problems solved by technology

It uses iron ore tailing waste rock and river sand instead of iron tailing sand, and uses expensive nano-titanium dioxide, which has a single purpose and fails to improve the performance of concrete such as compactness and impermeability, and has poor practicability and economy.

[0006] The above patents use some solid waste and nano-materials, but it is difficult to improve the strength of concrete, so it is not suitable for the preparation of high-strength waste concrete

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