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Chlorine ion curing agent for sea sand and preparation method and applications thereof

A technology of chloride ion and curing agent, which is applied in the direction of chemical instruments and methods, inorganic chemistry, iron compounds, etc., can solve problems such as adverse effects on mechanical properties, and achieve the goals of avoiding the deterioration of mortar mechanical properties, good working performance, and improving mechanical properties Effect

Active Publication Date: 2020-02-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the deficiencies in the above-mentioned prior art, the technical problem solved by the present invention is to deal with chloride ions in sea sand while avoiding adverse effects on the mechanical properties of cement-based materials, etc.

Method used

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  • Chlorine ion curing agent for sea sand and preparation method and applications thereof
  • Chlorine ion curing agent for sea sand and preparation method and applications thereof
  • Chlorine ion curing agent for sea sand and preparation method and applications thereof

Examples

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Embodiment 1

[0041] CaFe-NO in chloride ion curing agent used in sea sand 3 LDHs, CaFeAl-NO 3 The preparation method of LDHs includes the following steps:

[0042] (1)CaFe-NO 3 Synthesis and preparation of LDHs: Dissolve 40mmol calcium nitrate tetrahydrate and 15mmol ferric nitrate nonahydrate in 100mL distilled water to prepare A solution; add A solution dropwise to 100mL 1mol / L sodium hydroxide solution (nitrogen protection ), after the titration is completed, magnetically stirred for 36 hours, then filtered to neutrality, dried in a vacuum drying oven at 80°C for 12 hours, and the obtained product is ground into powder to obtain.

[0043] (2)CaFeAl-NO 3 Synthesis and preparation of LDHs: Dissolve 100mmol calcium nitrate tetrahydrate, 10mmol ferric nitrate nonahydrate, 40mmol aluminum nitrate nonahydrate in 100mL distilled water to prepare B solution; dissolve 260mmol sodium hydroxide and 120mmol sodium nitrate in 100mL Prepare solution C; add solution B and solution C dropwise to a three...

Embodiment 2

[0045] CaFe-NO in chloride ion curing agent used in sea sand 3 LDHs, CaFeAl-NO 3 The preparation method of LDHs includes the following steps:

[0046] 1. CaFeL-NO 3 Synthesis and preparation of DHs: Dissolve 10mmol of calcium nitrate and 5mmol of ferric nitrate in 100mL of distilled water to prepare A solution; add A solution dropwise to 30mL of 1mol / L sodium hydroxide solution (gas flow rate is 100ml / min Nitrogen protection), after the titration is completed, magnetically stirred for 12 hours, then filtered to neutrality, dried in a vacuum drying oven at 60°C for 24 hours, and the obtained product is ground into powder to obtain.

[0047] 2. CaFeAl-NO 3 Synthesis and preparation of LDHs: Dissolve 30mmol of calcium nitrate, 5mmol of ferric nitrate, and 10mmol of aluminum nitrate in 120mL of distilled water to form B solution; dissolve 80mmol of sodium hydroxide and 100mmol of sodium nitrate in 120mL of distilled water to form Solution C: Add solution B and solution C dropwise t...

Embodiment 3

[0049] CaFe-NO in chloride ion curing agent used in sea sand 3 LDHs, CaFeAl-NO 3 The preparation method of LDHs includes the following steps:

[0050] 1. CaFeL-NO 3 Synthesis and preparation of DHs: Dissolve 50mmol of calcium nitrate and 25mmol of ferric nitrate in 120mL of distilled water to prepare A solution; add A solution dropwise to 140mL of 1mol / L sodium hydroxide solution (gas flow rate is 100ml / min Nitrogen protection), after the titration is completed, magnetically stirred for 48 hours, then filtered to neutrality, dried in a vacuum drying oven at 120°C for 6 hours, and the obtained product is ground into powder to obtain.

[0051] 2. CaFeAl-NO 3 Synthesis and preparation of LDHs: Dissolve 150mmol of calcium nitrate, 20mmol of ferric nitrate, and 50mmol of aluminum nitrate in 150mL of distilled water to prepare B solution; dissolve 300mmol of sodium hydroxide and 200mmol of sodium nitrate in 150mL of distilled water to prepare Solution C: Add solution B and solution C...

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Abstract

The invention belongs to the technical field of chlorine ion curing agents, and especially relates to a chlorine ion curing agent for sea sand and a preparation method and applications thereof. The curing agent comprises following raw materials in parts by weight: 20 to 40 parts of CaFe-NO3 LDHs nano sheet, 20 to 40 parts of CaFeAl-NO3 LDHs nano sheet, 20 to 30 parts of alkaline anion exchange resin, and 5 to 10 parts of polyvinylpyrrolidone, wherein the CaFe-NO3 LDHs nano sheet and the CaFeAl-NO3 LDHs nano sheet are metal dihydroxide with a layered structure. The chlorine ion curing agent isa composite of organic substances and inorganic substances, the addition amount is little, the chlorine ion curing effect is prominent, and the mechanical properties, anti-corrosion performance, and impervious property of a cement based material are obviously enhanced at the same time.

Description

Technical field [0001] The invention belongs to the technical field of chloride ion curing agents, and in particular relates to a chloride ion curing agent applied to sea sand, and a preparation method and application thereof. Background technique [0002] The information disclosed in the background of the present invention is only intended to increase the understanding of the overall background of the present invention, and is not necessarily regarded as an acknowledgement or any form of suggestion that the information constitutes the prior art known to those of ordinary skill in the art. [0003] With the rapid development of the construction industry, my country’s river sand resources have been declining year by year and have been unable to meet the demand for construction sand. At the same time, the excessive exploitation of river sand has also caused great damage to the ecological environment. Therefore, avoiding over-exploitation of river sand and actively looking for other a...

Claims

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Application Information

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IPC IPC(8): C01G49/00C04B22/08C04B28/04C04B111/20
CPCC01G49/009C04B22/085C04B28/04C04B2111/2015C04B14/068
Inventor 芦令超杨磊赵丕琪李来波程新
Owner UNIV OF JINAN
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