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A kind of porous concrete waterproofing agent and preparation method thereof

A technology of porous concrete and waterproofing agent, applied in the field of concrete, can solve the problems of short service life of waterproof materials, poor waterproof durability, high repair cost, etc., and achieve high practicality, improved waterproof and anti-seepage performance, and reasonable component ratio.

Active Publication Date: 2021-06-11
佛山市志必合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For concrete impermeability and waterproofing, this has always been the focus of research in the field of concrete materials, and it is also a hot topic that researchers are more concerned about; the cause of concrete leakage is mostly caused by the appearance of concrete cracks and the formation of seepage channels. Today's waterproof materials Short service life, poor waterproof durability, high repair cost and poor practicability in engineering applications

Method used

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  • A kind of porous concrete waterproofing agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] S1: Prepare materials;

[0050] Weigh oxidizing agent, crosslinking agent, photoinitiator, 3,4-dihydroxyphenylacetic acid, N-hydroxysuccinimide, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide in proportion Amine hydrochloride, sodium alginate and propyne, spare;

[0051] Weigh 2,2'-(1,2-ethylenediyldioxo)diethanethiol, chitosan, hydroxyl-terminated polydimethylsiloxane, dibutyltin dilaurate, ethyl orthosilicate Esters, emulsifiers, liquid paraffin and vanillin, set aside;

[0052] Weigh absolute ethanol, cetyltrimethylammonium bromide, ammonia water and silane coupling agent in proportion, and set aside; take calcium magnesium carbonate, sodium sulfate and sodium silicate, mix and stir for 10 minutes, and obtain a waterproofing aid;

[0053] S2: Preparation of modified silica microspheres:

[0054] Take absolute ethanol and deionized water, stir evenly, then add cetyltrimethylammonium bromide and ammonia water, continue to stir for 10 minutes, slowly add tetraethyl or...

Embodiment 2

[0068] S1: Prepare materials;

[0069] Weigh oxidizing agent, crosslinking agent, photoinitiator, 3,4-dihydroxyphenylacetic acid, N-hydroxysuccinimide, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide in proportion Amine hydrochloride, sodium alginate and propyne, spare;

[0070] Weigh 2,2'-(1,2-ethylenediyldioxo)diethanethiol, chitosan, hydroxyl-terminated polydimethylsiloxane, dibutyltin dilaurate, ethyl orthosilicate Esters, emulsifiers, liquid paraffin and vanillin, set aside;

[0071] Weigh absolute ethanol, cetyltrimethylammonium bromide, ammonia water and silane coupling agent in proportion, and set aside; take calcium magnesium carbonate, sodium sulfate and sodium silicate, mix and stir for 15 minutes, and obtain a waterproof additive;

[0072] S2: Preparation of modified silica microspheres:

[0073] Take absolute ethanol and deionized water, stir evenly, then add cetyltrimethylammonium bromide and ammonia water, continue to stir for 15 minutes, slowly add tetraethyl ...

Embodiment 3

[0087] S1: Prepare materials;

[0088] Weigh oxidizing agent, crosslinking agent, photoinitiator, 3,4-dihydroxyphenylacetic acid, N-hydroxysuccinimide, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide in proportion Amine hydrochloride, sodium alginate and propyne, spare;

[0089] Weigh 2,2'-(1,2-ethylenediyldioxo)diethanethiol, chitosan, hydroxyl-terminated polydimethylsiloxane, dibutyltin dilaurate, ethyl orthosilicate Esters, emulsifiers, liquid paraffin and vanillin, set aside;

[0090] Weigh absolute ethanol, cetyltrimethylammonium bromide, ammonia water and silane coupling agent in proportion, and set aside; take calcium magnesium carbonate, sodium sulfate and sodium silicate, mix and stir for 20 minutes, and obtain a waterproof additive;

[0091] S2: Preparation of modified silica microspheres:

[0092] Take absolute ethanol and deionized water, stir evenly, then add cetyltrimethylammonium bromide and ammonia water, continue to stir for 20 minutes, slowly add tetraethyl ...

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Abstract

The invention discloses a porous concrete waterproofing agent and a preparation method thereof. The raw materials of each component of the waterproofing agent include: by weight, 25-40 parts of modified gel, 4-6 parts of oxidizing agent, and 5-9 parts of crosslinking agent 3-5 parts, photoinitiator; The raw materials of each component of the modified gel include: by weight, 30-40 parts of pretreated microspheres, 25-30 parts of 3,4-dihydroxyphenylacetic acid, N- Hydroxysuccinimide 15‑20 parts, 1‑(3‑dimethylaminopropyl)‑3‑ethylcarbodiimide hydrochloride 15‑20 parts, sodium alginate 18‑25 parts, propyne 10‑ 14 servings. The invention discloses a porous concrete waterproofing agent and a preparation method thereof. The process design is simple, and the component distribution ratio is reasonable. Chitosan and sodium alginate are modified, and Michael addition reaction and chemical click reaction are used to form a dense waterproof agent. The dual-gel network can not only effectively improve the waterproof and anti-seepage performance of concrete, but also self-repair the waterproofing agent. It can be widely used in concrete construction and has high practicability.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a porous concrete waterproofing agent and a preparation method thereof. Background technique [0002] Waterproofing agent, a kind of chemical admixture, is added to cement. When the cement sets and hardens, the volume expands accordingly, which plays the role of compensating shrinkage, tensioning steel bars to generate prestress, and fully filling cement gaps. [0003] For concrete impermeability and waterproofing, this has always been the focus of research in the field of concrete materials, and it is also a hot topic that researchers are more concerned about; the cause of concrete leakage is mostly caused by the appearance of concrete cracks and the formation of seepage channels. The service life is short, the waterproof durability is poor, the repair cost is high in engineering applications, and the practicability is poor. [0004] Aiming at this problem, we disclose a porou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B103/65
CPCC04B2103/65C04B40/0039C04B22/06C04B24/04C04B24/121C04B24/38C04B24/00C04B24/16C04B24/026C04B24/42C04B24/36C04B24/008C04B22/12C04B24/08
Inventor 董卫兵
Owner 佛山市志必合材料有限公司
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