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A kind of ferric boride modified cement mortar with high mechanical properties and preparation method thereof

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

Active Publication Date: 2021-04-09
湖北华茂新型建材有限公司
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  • 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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  • A kind of ferric boride modified cement mortar with high mechanical properties and preparation method thereof
  • A kind of ferric boride modified cement mortar with high mechanical properties and preparation method thereof
  • A kind of ferric 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 a ferric boride modified cement mortar with high mechanical properties and a preparation method thereof. The ferric boride modified cement mortar is composed of the following components and parts by weight: Portland cement 310-350 parts, graded sand 1380-1420 parts, 230-270 parts of water, 0.16-0.33 parts of ferric boride raw material; the preparation method of ferric boride modified cement mortar is as follows: firstly prepare ferric boride aqueous solution, and then use ferric boride aqueous solution as composite modification The agent is evenly dispersed in the cement mortar, and the iron boride modified cement mortar is obtained through the process of stirring, vibrating, forming and curing. The ferric boride modified cement mortar prepared by the invention not only greatly improves the mechanical properties, but also extracts raw materials from construction waste, which can protect the environment and save resources.

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 Patents(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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