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Aqueous infiltrating crystallization type waterproof agent and preparation method thereof

A technology of osmotic crystallization and water repellent, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of weak use effect, leakage, application to plastering mortar, decorative mortar and other building materials, etc., to increase the compressive strength , strong penetration and diffusion, and the effect of improving durability

Inactive Publication Date: 2010-01-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous development of concrete technology in the direction of high strength and high performance, the strength of concrete structures is getting higher and higher, while the effect of traditional cement-based permeable crystalline waterproof materials is becoming weaker and weaker.
At the same time, because the traditional cement-based permeable crystalline waterproof material needs to be mixed with cement and mortar, it can only be applied to building materials such as plastering mortar and decorative mortar in the application process. No convenient post-processing
At present, many early buildings have not been waterproofed for their building materials during the initial construction. Therefore, once water leakage occurs during subsequent use, it cannot be easily solved by using the existing cement-based permeable crystalline waterproof materials.
Most of the other types of waterproofing agents in the prior art can only be used for covering waterproofing. Once they are separated from the base layer, they will easily leak, and for different types, especially the external or internal construction of irregularly shaped building structures However, the effect of covering waterproofing is often unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Water-based penetrating crystalline waterproofing agent, its components and the weight percentage of each component are:

[0044] Tartaric acid (technical grade dextrotartaric acid) 15%, sodium fluoride (technical grade) 19%, silica sol (pH value is 2.0, and silicon dioxide weight percent is 30%, and the average particle diameter of colloidal particle is the acidic instability of 20nm dosage form) 10%, silane emulsion (pH value is 6.5, aqueous solution of 20% by weight of n-octyltriethoxysilane) 1%, deionized water 55%.

[0045] Preparation method: Weigh each component according to the above formula ratio, then add tartaric acid, sodium fluoride, silica sol, and silane emulsion into water successively to prepare a mixed solution, stir the mixed solution fully in the reaction kettle, and then pass through the mesh The impurity in the solution was removed by filtration through a 400-mesh acid-resistant filter, and the clear liquid after filtration was used to obtain the w...

Embodiment 2

[0049] Water-based penetrating crystalline waterproofing agent, its components and the weight percentage of each component are:

[0050] Tartaric acid (industrial grade L-tartaric acid) 28%, sodium fluoride (industrial grade) 8%, silica sol (pH value is 5.0, silicon dioxide weight percent is 40%, the average particle diameter of colloidal particle is the acidic unstable dosage form of 15nm ) 2%, silane emulsion (pH value is 6.5, the aqueous solution of 20% by weight of n-octyltriethoxysilane) 10%, deionized water 52%.

[0051] Preparation method: Weigh each component according to the above formula ratio, then add tartaric acid, sodium fluoride, silica sol, and silane emulsion into water successively to prepare a mixed solution, stir the mixed solution fully in the reaction kettle, and then pass through the mesh The impurity in the solution was removed by filtration through a 400-mesh acid-resistant filter, and the clear liquid after filtration was used to obtain the water-base...

Embodiment 3

[0055] Water-based penetrating crystalline waterproofing agent, its components and the weight percentage of each component are:

[0056] Tartaric acid (industrial grade meso-tartaric acid) 22%, sodium fluoride (industrial grade) 13%, silica sol (pH value is 7.0, silicon dioxide weight percent is 20%, the average particle diameter of colloidal particle is the acidic free of 10nm stable dosage form) 4%, silane emulsion (aqueous solution of n-octyltriethoxysilane with a pH value of 7.0 and 40% by weight) 3%, deionized water 58%.

[0057] Preparation method: Weigh each component according to the above formula ratio, then add tartaric acid, sodium fluoride, silica sol, and silane emulsion into water successively to prepare a mixed solution, stir the mixed solution fully in the reaction kettle, and then pass through the mesh The impurity in the solution was removed by filtration through a 400-mesh acid-resistant filter, and the clear liquid after filtration was used to obtain the wa...

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Abstract

The invention belongs to the field of construction materials, in particular to an aqueous infiltrating crystallization type waterproof agent and a preparation method thereof. The aqueous infiltrating crystallization type waterproof agent comprises tartaric acid, sodium fluoride, silica sol, silane emulsion and water. The aqueous infiltrating crystallization type waterproof agent is aqueous waterproof admixture comprising a plurality of active chemical components and has high infiltrating ability and lower surface tension. After the aqueous infiltrating crystallization type waterproof agent is applied to the basal plane of concrete, an active compound is infiltrated and diffused in the concrete and reacts with a hydrated product in the concrete in a pore to generate a needle or fiber-shaped crystal so as to block the pore, thereby compacting the concrete and playing the roles of preventing water, ventilating, increasing the compression resistant strength, and the like.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a water-based osmotic crystalline waterproofing agent and a preparation method thereof. Background technique [0002] Reinforced concrete is currently the largest building structure material used by humans. The main causes of concrete deterioration processes (physical, chemical, and biological) and steel or prestressed reinforcement deterioration are freeze-thaw cycles, alkali-aggregate reaction, sulfate attack, shrinkage cracking, and steel corrosion. [0003] For any of the above-mentioned deterioration processes, the cause of expansion and cracking is related to water, and water is also the carrier for the migration of aggressive media (such as chloride salts, sulfates, etc.) into the concrete. Water is not only the transmission medium of destructive substances, but also the necessary condition for the occurrence of damage and the basis for the establishment of m...

Claims

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Application Information

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IPC IPC(8): C09K3/18C04B41/45
Inventor 蒋正武
Owner TONGJI UNIV
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