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CN-120483579-B - Solid waste-based composite cementing material and preparation method thereof

CN120483579BCN 120483579 BCN120483579 BCN 120483579BCN-120483579-B

Abstract

The invention discloses a solid waste matrix composite cementing material and a preparation method thereof, and relates to the technical field of solid waste regeneration. The invention carries out copper plating treatment on the silicon dioxide, and then adds the copper plating treatment into the concrete, thereby strengthening the strength of the concrete. The modified carbon fiber is modified by using methyl acrylate and poly (ethylene glycol) methacrylate, so that the hydrophilicity of the modified carbon fiber is enhanced, the compatibility of the modified carbon fiber with a concrete base material is improved, the porosity of the concrete base material is reduced, and the strength of the concrete base material is enhanced. According to the invention, the copper-plated silicon dioxide and the modified carbon fiber are compounded together, and the gamma-aminopropyl triethoxysilane is used for modifying carbide slag, fly ash and silica fume, so that the dispersibility of the copper-plated silicon dioxide is improved, the compatibility of the silicon dioxide-carbon fiber compound in the concrete base material is improved, and the strength of the concrete base material is enhanced.

Inventors

  • XIE PU

Assignees

  • 南京腾恒新材料有限公司

Dates

Publication Date
20260505
Application Date
20250604

Claims (4)

  1. 1. The preparation method of the concrete is characterized in that the preparation method of the concrete comprises the steps of taking solid waste base composite cementing material, adding gypsum, quicklime, cement, fly ash and silicon dioxide-carbon fiber composite, and ball milling for 50-60min at 70-75 ℃ to obtain the concrete; The preparation method of the silicon dioxide-carbon fiber composite comprises the steps of taking modified carbon fibers and deionized water, performing ultrasonic dispersion for 50-70min, adding dopamine, stirring for 30-35min, adding a tris buffer solution, adding hydrochloric acid, adjusting the pH to 8.0-8.5, stirring for 20-24h at 25-30 ℃, adding copper-plated silicon dioxide, stirring for 22-24h at 25-30 ℃, centrifuging, washing and drying to obtain the silicon dioxide-carbon fiber composite; The preparation method of the modified carbon fiber comprises the steps of taking the pretreated carbon fiber and methanol, carrying out ultrasonic dispersion, adding methyl acrylate, heating to 50-55 ℃, stirring for 10-14h, adding ethylenediamine, stirring, centrifuging, washing and drying, adding dimethyl sulfoxide, stirring for 20-25min, heating to 70-75 ℃, adding poly (ethylene glycol) methacrylate and lithium chloride, stirring for 22-26h, centrifuging, washing and drying to obtain the modified carbon fiber; Taking carbon fiber and toluene, performing ultrasonic dispersion, introducing nitrogen, adding gamma-aminopropyl triethoxysilane, heating to 100-105 ℃, stirring for 20-22h, cooling, centrifuging, washing and drying to obtain pretreated carbon fiber; The preparation method of the copper-plated silicon dioxide comprises the steps of taking a copper sulfate solution and a sulfuric acid solution, uniformly stirring to obtain an electrolyte, adding silicon dioxide, uniformly stirring, performing pulse electrophoresis deposition treatment for 30-40min, wherein a cathode is copper alloy, an anode is pure titanium, and washing and drying after pulse electrophoresis deposition is finished to obtain the copper-plated silicon dioxide.
  2. 2. The method for preparing concrete according to claim 1, wherein the concrete comprises, by weight, 50-58 parts of solid waste based composite cementing material, 10-15 parts of fly ash, 6-10 parts of gypsum, 1-2 parts of quicklime, 5-10 parts of cement and 3-5 parts of silica-carbon fiber composite.
  3. 3. The method of producing concrete according to claim 1, wherein the mass ratio of the carbon fiber to the gamma-aminopropyl triethoxysilane is (5-6) 8.5.
  4. 4. A concrete prepared by the method for preparing a concrete according to any one of claims 2 to 3.

Description

Solid waste-based composite cementing material and preparation method thereof Technical Field The invention relates to the technical field of solid waste regeneration, in particular to a solid waste-based composite cementing material and a preparation method thereof. Background Along with the acceleration of global industrialization process, the yield of industrial solid waste is continuously increased, such as coal gangue, carbide slag, desulfurized gypsum, aluminum ash, steel slag and the like. The large accumulation of these solid wastes not only occupies land resources, but also may cause environmental pollution. Therefore, how to effectively utilize these solid wastes and realize recycling is a problem to be solved. In the field of building materials, conventional cementing materials such as cement consume large amounts of natural mineral resources during production and have high carbon emissions. In order to reduce the reliance on natural resources and reduce carbon emissions, researchers have begun to explore the use of industrial solid waste to prepare composite cementitious materials. However, existing concrete materials still have some disadvantages in terms of performance and application. The strength of the material is to be improved. In addition, the physical and chemical properties of different solid wastes are greatly different, and how to realize the synergistic effect of various solid wastes and optimize the material performance is also a problem needing further research. In order to solve the problems and improve the strength of the material, the invention provides a solid waste-based composite cementing material and a preparation method thereof. Disclosure of Invention The invention aims to provide a solid waste matrix composite cementing material and a preparation method thereof, which are used for solving the problems in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: A preparation method of the solid waste-based composite cementing material comprises the steps of taking carbide slag, slag powder and silica fume, grinding to obtain the cementing material, taking the cementing material, adding toluene, performing ultrasonic dispersion, adding gamma-aminopropyl triethoxysilane, stirring for 20-22h, centrifuging, washing and drying to obtain the solid waste-based composite cementing material. More optimally, the preparation method of the concrete comprises the steps of taking the solid waste base composite cementing material prepared in the claim 1, adding gypsum, quicklime, cement, fly ash and silicon dioxide-carbon fiber composite, and ball milling for 50-60min at 70-75 ℃ to obtain the concrete. More optimally, the concrete comprises, by weight, 50-58 parts of solid waste based composite cementing material, 10-15 parts of fly ash, 6-10 parts of gypsum, 1-2 parts of quicklime, 5-10 parts of cement and 3-5 parts of silica-carbon fiber composite. More optimally, the preparation method of the silicon dioxide-carbon fiber composite comprises the steps of taking modified carbon fibers and deionized water, performing ultrasonic dispersion for 50-70min, adding dopamine, stirring for 30-35min, adding a tris buffer solution, adding hydrochloric acid, adjusting the pH to 8.0-8.5, stirring for 20-24h at 25-30 ℃, adding copper-plated silicon dioxide, stirring for 22-24h at 25-30 ℃, centrifuging, washing and drying to obtain the silicon dioxide-carbon fiber composite. More optimally, the preparation method of the modified carbon fiber comprises the steps of taking the pretreated carbon fiber and methanol, carrying out ultrasonic dispersion, adding methyl acrylate, heating to 50-55 ℃, stirring for 10-14h, adding ethylenediamine, stirring, centrifuging, washing and drying, adding dimethyl sulfoxide, stirring for 20-25min, heating to 70-75 ℃, adding poly (ethylene glycol) methacrylate and lithium chloride, stirring for 22-26h, centrifuging, washing and drying to obtain the modified carbon fiber. More optimally, the preparation method of the pretreated carbon fiber comprises the steps of taking the carbon fiber and toluene, carrying out ultrasonic dispersion, introducing nitrogen, adding gamma-aminopropyl triethoxysilane, heating to 100-105 ℃, stirring for 20-22h, cooling, centrifuging, washing and drying to obtain the pretreated carbon fiber. More preferably, the mass ratio of the carbon fiber to the gamma-aminopropyl triethoxysilane is (5-6) 8.5. More optimally, the preparation method of the copper-plated silicon dioxide comprises the steps of taking a copper sulfate solution and a sulfuric acid solution, stirring uniformly to obtain an electrolyte, adding silicon dioxide, stirring uniformly, performing pulse electrophoresis deposition treatment for 30-40min, wherein a cathode is copper alloy, an anode is pure titanium, and washing and drying after pulse electrophoresis deposition is finished to obtain the copper-plated silicon diox