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A kind of construction waste modified silica powder and preparation method thereof

A technology of construction waste and silicon micropowder, which is applied in the field of building materials, can solve the problems of low applicability and small application range, and achieve the effects of good applicability, improved porosity, and good adsorption performance

Active Publication Date: 2022-04-12
CHINA CONSTR EIGHTH ENG DIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of construction waste modified silicon micropowder and its preparation method, in order to improve the utilization rate of construction waste, solve the problem that the existing construction waste is mostly used as building materials, the application range is small, and the applicability is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of construction waste modified silicon micropowder of the present invention is made up of the following raw materials of weight part:

[0027] 3 parts of phosphorous acid, 100 parts of pretreated construction waste, 200 parts of ethyl orthosilicate, 2 parts of 1H,1H,2H,2H-perfluorodecyltriethoxysilane, 10 parts of chitosan, dodecane 4 parts of sodium phenyl sulfonate, 5 parts of oxidized polyethylene wax.

[0028] Among them, construction waste includes muck, waste mortar, and broken waste bamboo and wood, and the volume ratio of the three is 1:2:1.

[0029] Wherein the preparation method for pre-processing construction waste comprises the following steps:

[0030] Take construction waste, add lye to the waste, stir evenly, pile up for 2 hours, send it into a sintering furnace, calcinate at 700°C for 60 minutes, discharge the material and cool it, and grind it into fine powder.

[0031] Described lye is the sodium hydroxide aqueous solution that concentration i...

Embodiment 2

[0039] A kind of construction waste modified silicon micropowder of the present invention is made up of the following raw materials of weight part:

[0040] 5 parts of phosphorous acid, 120 parts of pretreated construction waste, 250 parts of ethyl orthosilicate, 6 parts of 1H,1H,2H,2H-perfluorodecyltriethoxysilane, 15 parts of chitosan, dodecane 7 parts of sodium phenyl sulfonate, 8 parts of oxidized polyethylene wax.

[0041] Among them, construction waste includes muck, waste mortar, and broken waste bamboo and wood, and the volume ratio of the three is 1:2:1.

[0042] Wherein the preparation method for pre-processing construction waste comprises the following steps:

[0043] Take construction waste, add lye to the waste, stir it evenly, pile it up for 3 hours, put it into a sintering furnace, calcinate it at 800°C for 80 minutes, let it cool down, and grind it into fine powder.

[0044] The lye is an aqueous potassium hydroxide solution with a concentration of 2 mol / L. ...

Embodiment 3

[0052] A kind of construction waste modified silicon micropowder of the present invention is made up of the following raw materials of weight part:

[0053] 4 parts of phosphorous acid, 110 parts of pretreated construction waste, 220 parts of ethyl orthosilicate, 4 parts of 1H,1H,2H,2H-perfluorodecyltriethoxysilane, 12 parts of chitosan, dodecane 6 parts of sodium phenyl sulfonate, 6 parts of oxidized polyethylene wax.

[0054] Among them, construction waste includes muck, waste mortar, and broken waste bamboo and wood, and the volume ratio of the three is 1:2:1.

[0055] Wherein the preparation method for pre-processing construction waste comprises the following steps:

[0056] Take construction waste, add lye to the waste, stir evenly, pile up for 2 hours, send it into a sintering furnace, calcinate at 760°C for 65 minutes, discharge and cool, and grind into fine powder.

[0057] The lye is an aqueous sodium hydroxide solution with a concentration of 1.8mol / L.

[0058] A ...

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Abstract

The invention discloses a construction waste modified silicon micropowder and a preparation method thereof, belonging to the field of building materials. The modified silica powder is composed of the following raw materials in parts by weight: 3-5 parts of phosphorous acid, 100-120 parts of pretreated construction waste, 200-250 parts of ethyl orthosilicate, 1H, 1H, 2H, 2H-perfluorodecane 2‑6 parts of triethoxysilane, 10‑15 parts of chitosan, 4‑7 parts of sodium dodecylbenzenesulfonate, and 5‑8 parts of oxidized polyethylene wax. In the present invention, the construction waste is first soaked in alkaline solution, which can not only remove the acid residue on the surface, but also improve the porosity between the soil powder, and then blend it with the silica sol formed by tetraethyl orthosilicate, and use chitosan, polyethylene Wax is the raw material for coating, and after calcining, it can effectively form stable coated silica powder. The finished product has good adsorption performance and high mechanical strength. It can be applied to environmental protection coatings, plastic materials, etc., and has good applicability.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a modified silicon micropowder of construction waste and a preparation method thereof. Background technique [0002] Construction waste refers to the general designation of muck, waste concrete, waste masonry and other waste generated in the production activities of people engaged in demolition, construction, decoration, repair and other construction industries. According to the classification of generation sources, construction waste can be divided into engineering slag Soil, decoration waste, demolition waste, engineering mud, etc.; classified by composition, construction waste can be divided into muck, concrete blocks, crushed stones, brick and tile fragments, waste mortar, mud, asphalt blocks, waste plastics, waste metals , waste bamboo and wood, etc. These materials are of no help to the building itself, but they are substances produced during the construction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B14/06C04B20/02C04B20/04
Inventor 郭强王帅王健
Owner CHINA CONSTR EIGHTH ENG DIV