A reagent for inhibiting shrinkage of cement-based materials

A technology for cement-based materials and reagents, which is applied in the field of reagents for inhibiting the shrinkage of cement-based materials, can solve the problems of delaying ettringite to form cement adaptability, affecting the health of construction workers, and large organic solvent content, and reducing capillary pores. Tension, improve saponification reaction, uniform distribution effect

Active Publication Date: 2022-03-11
贵州凯襄新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the existing shrinkage reducing agents are mainly liquid products, the organic solvent content is large, volatile, and has a pungent odor, which affects the health of construction workers, so its application effect is not ideal
If it is mixed with expansion agent, at least 14 days of water retention and maintenance must be carried out, and there are problems of delayed ettringite formation and cement adaptability, so it should be used with caution

Method used

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  • A reagent for inhibiting shrinkage of cement-based materials
  • A reagent for inhibiting shrinkage of cement-based materials
  • A reagent for inhibiting shrinkage of cement-based materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A reagent for inhibiting shrinkage of cement-based materials, and its preparation method comprises the steps of:

[0030] 1) Take pomelo peel and place it in a pulverizer to pulverize to obtain pomelo peel powder with a particle size of 200 meshes, mix pomelo peel powder and water into a container to obtain a suspension with a mass concentration of 60%, then add alkaline protease / Carboxylate reductase compound enzyme, enzymolysis at 35°C for 4 hours;

[0031] 2) After the above enzymatic hydrolysis is completed, dehydrate and dry to obtain a solid, add 16 times the amount of glacial acetic acid and 5% N-bromosuccinimide to the solid, and heat up under microwave irradiation with a power of 370W to 90°C, then heat and irradiate for 30 minutes;

[0032] 3) Place the resultant of step 2) under ultraviolet irradiation with an irradiation wavelength of 400nm, add benzophenone and lauryl glucoside, and stir for 15 minutes; The mass ratio is 1:0.03:0.5;

[0033] 4) Vacuum s...

Embodiment 2

[0036] A reagent for inhibiting shrinkage of cement-based materials, and its preparation method comprises the steps of:

[0037] 1) Take pomelo peel and place it in a pulverizer to pulverize to obtain pomelo peel powder with a particle size of 80 meshes, mix pomelo peel powder and water into a container to obtain a suspension with a mass concentration of 50%, then add alkaline protease / Carboxylate reductase compound enzyme, enzymolysis at 30°C for 3 hours;

[0038] 2) After the above enzymatic hydrolysis is completed, dehydrate and dry to obtain a solid, add glacial acetic acid and 1% N-bromosuccinimide to the solid, and heat up under microwave irradiation with a power of 320W to 85°C, then heat and irradiate for 20 minutes;

[0039] 3) Put the obtained product of step 2) under ultraviolet irradiation with an irradiation wavelength of 300nm, add benzophenone and lauryl glucoside, and stir for 10 minutes; The mass ratio is 1:0.01:0.2;

[0040] 4) Vacuum stirring the product...

Embodiment 3

[0043] A reagent for inhibiting shrinkage of cement-based materials, and its preparation method comprises the steps of:

[0044] 1) Take pomelo peel and place it in a pulverizer to pulverize to obtain pomelo peel powder with a particle size of 100 meshes, mix pomelo peel powder with water and pack into a container to obtain a suspension with a mass concentration of 55%, then add alkaline protease / Carboxylate reductase complex enzyme, enzymolysis at 32°C for 3.5h;

[0045] 2) After the above-mentioned enzymatic hydrolysis is completed, dehydrate and dry to obtain a solid, add glacial acetic acid and 3% N-bromosuccinimide to the solid, and heat up under microwave irradiation with a power of 350W to 87°C, then heat and irradiate for 25 minutes;

[0046] 3) Put the obtained product of step 2) under ultraviolet irradiation with an irradiation wavelength of 330nm, add benzophenone and lauryl glucoside, and stir for 13 minutes; The mass ratio is 1:0.02:0.3;

[0047]4) Vacuum stir...

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Abstract

The invention belongs to the technical field of building material additive production, and in particular relates to a reagent for inhibiting the shrinkage of cement-based materials. The production method of the reagent comprises the following steps: 1) mixing pomelo peel powder and water into a container to obtain suspension solution, and then add alkaline protease / carboxylate reductase compound enzyme to the container for enzymolysis; 2) after the above enzymolysis is completed, dehydrate and dry to obtain a solid, add a solvent and a catalyst to the solid, and heat it under microwave irradiation Raise the temperature to 85-90°C, heat and irradiate for 20-30min; 3) put the result of step 2) under ultraviolet radiation, add benzophenone and lauryl glucoside, and stir for 10-15min; 4) put the result of step 3) After vacuum stirring the mixture and waste cooking oil for 5-10 minutes, add manganese slag and vacuum stirring to obtain the product.

Description

technical field [0001] The invention belongs to the technical field of making building material additives, and in particular relates to a reagent for inhibiting shrinkage of cement-based materials. Background technique [0002] Cement-based materials are currently the most widely used construction materials in construction activities. Idealizing their important properties has always been the most concerned issue for building materials practitioners. Cement-based materials are heterogeneous and complex mixtures of heterogeneous, porous, Since the mixture is a continuous phase after hydration, the internal pore structure plays a vital role in the entry and exit of water and chemicals into concrete, directly affecting the durability and workability of concrete; cement is an aggregate of various minerals, and the hydration reaction The physical and chemical effects of hydration are very complex. The main hydration products include calcium silicate hydrate (C-S-H), accounting for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42
CPCC04B40/0039C04B18/248C04B24/14C04B24/00C04B24/04C04B24/005C04B24/008C04B24/10C04B24/08C04B18/144C04B24/42
Inventor 张鑫贾虎琛任鹏飞
Owner 贵州凯襄新材料有限公司
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