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Iron boride modified cement mortar with high mechanical properties and preparation method thereof

A technology of cement mortar and iron boride, applied in the direction of boron/boride, metal boride, nanotechnology, etc., can solve the problems of high brittleness, single function, low tensile strength, etc. chemical reaction and mechanical properties improvement

Active Publication Date: 2020-07-10
湖北华茂新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shortcomings of traditional cement mortar such as low tensile strength, high brittleness and single function, it is difficult to meet the requirements of modern production and life, so modern cement mortar needs to be transformed into high performance and multifunctional direction

Method used

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  • Iron boride modified cement mortar with high mechanical properties and preparation method thereof
  • Iron boride modified cement mortar with high mechanical properties and preparation method thereof
  • Iron boride modified cement mortar with high mechanical properties and preparation method thereof

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preparation example Construction

[0042] A preparation method of ferric boride modified cement mortar with high mechanical properties mainly comprises the following steps:

[0043] (1) Preparation of iron boride aqueous solution:

[0044] S1. Weigh 1-3g of scrap iron powder and add it to 60-100mL of 3mol / L dilute nitric acid or 37% concentrated hydrochloric acid for 4-8 hours;

[0045] S2. Take the supernatant obtained in step S1, and add a potassium hydroxide solution with a concentration of 3-6mol / L until the mixed solution is neutral;

[0046] S3. Adding a sodium borohydride solution with a concentration of 2 mol / L to the neutral solution in step S2 until the solution no longer produces precipitation;

[0047] S4. Centrifuge the mixture obtained in step S3 at a speed of 3000r / min, and then repeatedly wash the centrifuged sediment with distilled water and absolute ethanol several times;

[0048] S5, drying the precipitate obtained in step S4 in an oven at 70° C. for 12 hours to obtain long-chain nano-iron ...

Embodiment 1

[0056] Weigh 1g of scrap iron powder and add it to 60mL of dilute nitric acid with a concentration of 3mol / L to soak for 8 hours, take the supernatant obtained above, add a potassium hydroxide solution with a concentration of 6mol / L until the mixed solution is neutral, and then pour Add a sodium borohydride solution with a concentration of 2 mol / L to the solution until the solution no longer produces precipitation, centrifuge the mixture obtained above at a speed of 3000r / min, and then use distilled water and absolute ethanol to separate the centrifuged precipitates repeatedly. After washing several times, the obtained precipitate was dried in an oven at 70° C. for 12 hours to obtain long-chain nano-iron boride powder for use.

[0057] First, take 0.16 parts of nano-iron boride and slowly add it to 12.5 parts of water to mix, and stir magnetically until there is no suspended nano-iron boride powder on the surface of the water, and then put the initially stirred dispersion solut...

Embodiment 2

[0059] Weigh 3g of scrap iron powder and add it to 100mL of dilute nitric acid with a concentration of 3mol / L and soak for 4 hours, take the supernatant obtained above, add a potassium hydroxide solution with a concentration of 3mol / L until the mixed solution is neutral, and then pour Add a sodium borohydride solution with a concentration of 2 mol / L to the solution until the solution no longer produces precipitation, centrifuge the mixture obtained above at a speed of 3000r / min, and then use distilled water and absolute ethanol to separate the centrifuged precipitates repeatedly. After washing several times, the obtained precipitate was dried in an oven at 70° C. for 12 hours to obtain long-chain nano-iron boride powder for use.

[0060] First, take 0.25 parts of nano-iron boride and slowly add it to 12.5 parts of water to mix, and stir magnetically until there is no suspended nano-iron boride powder on the surface of the water, and then put the initially stirred dispersion sol...

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Abstract

The invention discloses iron boride modified cement mortar with high mechanical properties and a preparation method of the iron boride modified cement mortar. The iron boride modified cement mortar isprepared from the following components in parts by weight: 310 to 350 parts of Portland cement, 1380 to 1420 parts of graded sand, 230 to 270 parts of water and 0.16 to 0.33 part of an iron boride raw material. The preparation method of the iron boride modified cement mortar comprises the following steps: firstly, preparing an iron boride aqueous solution, then taking the iron boride aqueous solution as a composite modifier, uniformly dispersing the iron boride aqueous solution into the cement mortar, and carrying out stirring, vibrating, molding and curing processes to prepare the iron boride modified cement mortar. According to the iron boride modified cement mortar prepared by the invention, the mechanical property is greatly improved, and the raw materials are extracted from construction wastes, so that the environment can be protected, and resources are saved.

Description

technical field [0001] The invention relates to a novel cement mortar, in particular to an iron boride modified cement mortar with high mechanical properties and a preparation method thereof. Background technique [0002] In recent years, with the continuous acceleration of the urbanization process, large-scale demolition and reconstruction of old cities have resulted in a large amount of construction waste. Therefore, how to deal with construction waste and how to recycle it has become a huge challenge for major cities. In fact, construction waste is not garbage, it is a renewable resource, and its main components are: muck, waste steel bars, waste iron wires, scattered mortar, broken bricks and broken concrete blocks, etc. These materials account for about 80% of the total construction waste. Most of these materials can be reused as renewable resources after being sorted, removed or crushed. Therefore, domestic and foreign research on how to deal with construction waste a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C01B35/04B82Y40/00
CPCB82Y40/00C01B35/04C01P2004/10C04B28/04C04B2201/50C04B14/321C04B14/06
Inventor 何威焦志男王亚伟许吉航
Owner 湖北华茂新型建材有限公司
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