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Lithium silicate permeable protective coating composition and preparation method thereof

A protective coating and permeable technology, applied in the direction of alkali metal silicate coatings, anti-corrosion coatings, coatings, etc., can solve the problems of concrete damage, hidden safety hazards of concrete structures, economic and social losses, etc., to enhance waterproof performance and durability. Good performance of sex, wrapping and containment, and the effect of improving comprehensive performance

Inactive Publication Date: 2021-07-27
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The appearance of infiltration not only destroys the overall structure of the concrete and reduces the structural performance of the concrete, but also causes the corrosive medium to invade the interior of the concrete along the cracks and pores, making the protective effect of the concrete on the steel bar useless, causing the steel bar to corrode and expand, further It will bring greater damage to the concrete, at least it will affect the aesthetic effect of the concrete structure, and at the worst it will reduce the service life of the concrete. More seriously, it will cause hidden safety hazards in the concrete structure, which will seriously endanger people's safety and cause huge economic losses. and social loss
There are also many kinds of silicone protective agent products abroad, such as isobutylsilane, octyl or isooctylsilane, which can protect the concrete by brushing long-chain silane coupling agents on the concrete surface, but the cost is too high, and the long-chain Silane coupling agents do little to help concrete strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix the water-soluble lithium silicate with a concentration of 23wt% and the sodium methylsilicate solution with a concentration of 99wt%, and then disperse the sodium silicate powder ultrasonically at a frequency of 40kHz to obtain the first mixed solution, The mass ratio of the water-soluble lithium silicate with a concentration of 23 wt %, the sodium methyl silicate solution with a concentration of 99 wt % and the sodium silicate powder is 160:50:25, and the total mass of the first mixed solution is about 170 g.

[0028] (2) Add 4% of the total mass of sodium dodecylbenzenesulfonate (solid particles) and 4% of triethylamine solution to the above-mentioned first mixed solution, and ultrasonically disperse at a frequency of 40 kHz for 30 min to obtain a clear and transparent the second mixed solution.

[0029] (3) Add 0.5% silane coupling agent KH550 (liquid) to the total mass of the finally prepared lithium silicate-based penetrating protective coating composition...

Embodiment 2

[0032] The difference between Example 2 and Example 1 is that the amount of KH550 added is 1.5% of the total mass of the finally prepared lithium silicate penetrating protective coating composition.

Embodiment 3

[0034] The difference between Example 3 and Example 1 is that the amount of KH550 added is 1.0% of the total mass of the finally prepared lithium silicate penetrating protective coating composition.

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Abstract

The invention discloses a lithium silicate permeable protective coating composition and a preparation method thereof. The lithium silicate permeable protective coating composition is prepared from 23 wt% of water-soluble lithium silicate, a methyl sodium silicate solution with the concentration of 99 wt%, sodium silicate powder, sodium dodecyl benzene sulfonate, triethylamine, a silane coupling agent KH550 and waterborne epoxy resin E40. According to the invention, metal silicate is used as an inorganic system, waterborne epoxy resin and the like are used as an organic system, the prepared lithium silicate-silane permeable composite protective coating can form a waterproof layer on the surface of concrete to block microcracks of the concrete, and the problem of water seepage of the concrete can be solved.

Description

technical field [0001] The invention belongs to the technical field of concrete protection, and in particular relates to a lithium silicate-based permeable protective coating composition and a preparation method thereof. Background technique [0002] Concrete is made by mixing cementitious materials such as cement and coarse and fine aggregates, and is essentially a porous heterogeneous material. During the cement hydration process, a large number of pores inevitably appear inside the concrete. In actual use, changes in temperature, intrusion of corrosive media, and vibration changes in loads will cause long-term damage to it, which will cause pores and cracks inside the concrete to continuously appear and grow, resulting in leakage of concrete. The appearance of infiltration not only destroys the overall structure of the concrete and reduces the structural performance of the concrete, but also causes the corrosive medium to invade the interior of the concrete along the cra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/04C09D5/08C09D7/63C04B41/68
CPCC04B41/009C04B41/5089C04B41/68C09D1/04C09D5/08C09D7/63C04B41/5024C04B41/4905C04B41/488C04B41/46C04B28/00
Inventor 许一婷吕妍黄永毅祝奥奇杨顺荣贾嘉坤戴李宗
Owner XIAMEN UNIV
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