Water-resistant salt-resistant concrete protecting agent and preparation method thereof

A protective agent and concrete technology, which is applied in the field of concrete waterproof and salt-proof protective agent and its preparation, can solve the problems of short service life, slow reinforced concrete structure, and failure of salt damage prevention function, so as to improve durability, shorten repair time, The effect that is superior in waterproofness

Inactive Publication Date: 2012-04-04
SHANGHAI FAHE BRIDGE & TUNNEL MAINTENANCE ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in addition to the basic physical cleaning, it is also necessary to consider the long-term impact of the slow chemical reaction on the entire reinforced concrete structure, and even the simplest surface waterproof function, otherwise the corrosion of the concrete will not be cured, and it will not only waste engineering costs. Not to mention some manpower and material resources, it also poses a hidden danger to the long-term stability and safety of reinforced concrete structures.
[0003] Although there are similar concrete protection materi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method for a concrete waterproof and salt-proof protective agent, the method comprises the following process steps:

[0044] (1) Add 1.6 kg of vinyl acetate solvent and 1.6 kg of water into the reactor, stir and dissolve, then keep stirring and add 20 kg of acrylic resin, add 36 kg of water, drop into the reactor successively, fully stir;

[0045] (2) Keep stirring and slowly put 10 kg of aluminum metasilicate into the reaction kettle, sequentially add 0.3 kg of titanium dioxide, 0.34 kg of carbon black powder, 0.13 kg of hydroxypropyl methylcellulose, and stir for 1.5 hours. When the above raw materials After all are dissolved and mixed, stop for aging for 18 hours;

[0046] (3) Continue to add 12 kg of D35 heavy calcium carbonate to the reaction kettle, 38 kg of white silicon powder with a particle size of 325 mesh, and 0.1 kg of silicone, and continue to stir for 1.5 hours. After mixing evenly, measure the solid content and adjust it to the theoretical ...

Embodiment 2

[0048] A preparation method for a protective agent for waterproofing and salt prevention of concrete, the method comprising the following steps:

[0049] (1) 20kg of acrylate resin is placed in a reaction kettle, and it is mixed with water into a solution with a concentration of 35wt%, fully stirred to make it evenly mixed;

[0050] (2) Keep stirring, slowly add 8kg of aluminum metasilicate, 0.1kg of titanium dioxide, 0.1kg of carbon black powder and 0.1kg of hydroxypropyl methylcellulose into the reactor, and continue stirring for 1 hour. After the above materials are completely dissolved, stop Stir and ripen for 12 hours;

[0051] (3) Add 10 kg of ground calcium carbonate, 35 kg of silicon micropowder with a particle size of 300 mesh and 0.05 kg of silicone to the aged mixture, and continue stirring for 1 hour to obtain a protective agent for concrete waterproofing and salt prevention.

Embodiment 3

[0053] A preparation method for a protective agent for waterproofing and salt prevention of concrete, the method comprising the following steps:

[0054] (1) 20kg acrylate resin is placed in the reaction kettle, and it is mixed with the solution that concentration is 35wt% with water, then 5kg vinyl acetate is placed in the reaction kettle, it is mixed with the solution that concentration is 45wt% with water, Stir well to make it evenly mixed;

[0055] (2) Keep stirring, slowly add 15kg of aluminum metasilicate, 0.5kg of titanium dioxide, 0.5kg of carbon black powder and 0.2kg of hydroxypropyl methylcellulose into the reactor, and continue to stir for 2 hours. After the above materials are completely dissolved, stop Stir and ripen for 12 hours;

[0056] (3) Add 15kg of ground calcium carbonate, 40kg of silicon micropowder with a particle size of 400 mesh and 0.2kg of silicone to the aged mixture, and continue stirring for 2 hours to obtain a protective agent for concrete wate...

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Abstract

The invention relates to a water-resistant salt-resistant concrete protecting agent and a preparation method thereof. The protecting agent comprises the following components, by weight, 35-40 parts of silicon powder, 10-15 parts of heavy calcium carbonate, 0.1-0.5 parts of titanium dioxide, 0.1-0.5 parts of carbon black powder, 8-15 parts of aluminum metasilicate, 0.05-0.2 parts of organic silicon, 0.1-0.2 parts of hydroxypropylmethyl cellulose, and 20-25 parts of an additive resin. According to the preparation method, the additive resin is put in a reactor and is prepared into a solution; the solution is uniformly stirred; aluminum metasilicate, titanium dioxide, the carbon black powder and hydroxypropylmethyl cellulose are slowly added to the reactor and are slaked; and heavy calcium carbonate, the silicon powder and organic silicon are added and are stirred to obtain the protecting agent. Compared with concrete protecting agents prepared with the prior art, the water-resistant salt-resistant concrete protecting agent of the invention, which is painted on the base surface of the whole concrete, allows beam bodies to be well sealed and the concrete to possess various corrosion resistances of the water resistance, the salt resistance and the like, so the concrete durability is improved.

Description

technical field [0001] The invention relates to a waterproof and salt-proof protective agent for concrete and a preparation method thereof, in particular to a waterproof and salt-proof protective agent for concrete and a preparation method thereof. Background technique [0002] The main core idea of ​​reinforced concrete curing is to prolong its durability. In the process of prolonging the durability of concrete, in addition to the necessary rust removal of steel bars, base surface cleaning and base surface repair, there is the last and most important process - surface protection - which is the first step in judging the quality of repair and reinforcement A checkpoint. As we all know, because reinforced concrete structures are exposed to the atmosphere for a long time, that is, affected by air and water vapor, no matter how clean the original expanded, loose, peeled, and corroded concrete is cleaned, the rust on the surface of the steel bar will be removed. How thorough it...

Claims

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Application Information

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IPC IPC(8): C04B41/50
Inventor 张智玲
Owner SHANGHAI FAHE BRIDGE & TUNNEL MAINTENANCE ENG TECH
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