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Modified lithium-based concrete sealing curing agent and preparation method thereof

A sealing and curing agent, concrete technology, applied in the direction of alkali metal silicate paint, coating, etc., can solve the problems of concrete surface strength, general waterproof performance, easy to be corroded, etc.

Pending Publication Date: 2021-09-14
浙大宁波理工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the common lithium-based sealing and curing agents currently on the market still have certain problems in terms of performance and preparation technology. After the curing agent is used, the strength and waterproof performance of the concrete surface are still relatively average, and it is easy to be corroded. In terms of matching, how to determine an optimal ratio to make the performance of the curing agent reach a relatively good level, and how to prepare a sealing and curing agent with good matrix strength and water absorption performance are technical problems that are currently difficult to solve in the industry

Method used

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  • Modified lithium-based concrete sealing curing agent and preparation method thereof
  • Modified lithium-based concrete sealing curing agent and preparation method thereof
  • Modified lithium-based concrete sealing curing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A modified lithium-based concrete sealing and curing agent, according to the mass percentage, is made of the following raw materials: liquid lithium silicate 30wt%, sodium silicate 1wt%, neutral silica sol (average particle diameter 15nm) surfactant 0.5wt %, dispersant 0.5wt%, defoamer 0.5wt%, fluorosilicate 5wt%, graphene oxide 0.05wt%, the balance is deionized water; Surfactant is sodium stearate in the present embodiment, dispersing The agent is polyethylene glycol PEG200, the defoamer is food-grade silicone defoamer, and the fluorosilicate is MgSiF 6 , the thickness of the graphene oxide sheet is 0.5nm, and the sheet diameter is 7μm.

[0044] The preparation method of the present embodiment modified lithium-based concrete sealing and curing agent, the preparation steps are as follows:

[0045] (1) Accurately weigh each raw material;

[0046] (2) Mix liquid lithium silicate, sodium silicate, fluorosilicate and graphene oxide, stir at 60°C for 60 minutes, cool to ro...

Embodiment 2

[0050] A modified lithium-based concrete sealing and curing agent, according to the mass percentage, is made of the following raw materials: 40wt% of liquid lithium silicate, 5wt% of sodium silicate, 30wt% of alkaline silica sol (average particle size 15nm), surface active Agent 1.25wt%, dispersant 0.75wt%, defoamer 1.25wt%, fluorosilicate 3wt%, graphene oxide 0.02wt%, deionized water surplus; Present embodiment surfactant is dodecylsulfuric acid Sodium, dispersant is polyethylene glycol PEG200, defoamer is food grade silicone defoamer, fluorosilicate is MgSiF 6 , the thickness of the graphene oxide sheet is 2 nm, and the sheet diameter is 8 μm.

[0051] The preparation method of the modified lithium-based concrete sealing and curing agent in this example is the same as that in Example 1.

Embodiment 3

[0053] A modified lithium-based concrete sealing and curing agent is made of the following raw materials in terms of mass percentage: 50wt% of liquid lithium silicate, 8wt% of sodium silicate, 20wt% of alkaline silica sol (average particle size 15nm), surface active Agent 2wt%, dispersant 1wt%, defoamer 2wt%, fluorosilicate 10wt%, graphene oxide 0.02wt%, deionized water surplus; Present embodiment surfactant is sodium dodecylbenzenesulfonate , the dispersant is polyethylene glycol PEG200, the defoamer is food-grade silicone defoamer, and the fluorosilicate is CaSiF 6 , the thickness of the graphene oxide sheet is 0.8nm, and the sheet diameter is 6μm.

[0054] The preparation method of the modified lithium-based concrete sealing and curing agent in this example is the same as that in Example 1.

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Abstract

The invention discloses a modified lithium-based concrete sealing curing agent and a preparation method thereof, and relates to the technical field of building materials, the modified lithium-based concrete sealing curing agent comprises the following raw materials by mass: 30-50 wt% of liquid lithium silicate, 0-10 wt% of sodium silicate, 0-30 wt% of silica sol, 0.5-2 wt% of a surfactant, 0.5-1 wt% of a dispersant, 0.5-2 wt% of an antifoaming agent, 3-15 wt% of fluosilicate, 0.02-0.3 wt% of graphene oxide and the balance of water, wherein the content of the sodium silicate and the content of the silica sol are not zero, and the prepared sealing curing agent is good in comprehensive performance, capable of effectively improving the structural strength, abrasion resistance, water resistance and other performance of concrete and high in commercial and popularization value.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a modified lithium-based concrete sealing and curing agent and a preparation method thereof. Background technique [0002] In modern buildings, concrete is the most widely used building structure material. It is a mixture of cementitious materials, granular aggregates, water, and chemical admixtures and mineral admixtures in appropriate proportions. The material has the advantages of economy, durability, fire resistance and high compression resistance. Nowadays, as highways, bridges, ocean development, tunnel construction and other fields are developing in the direction of complexity, large-scale, and convenience, the requirements for the performance of concrete are becoming more and more stringent and demanding. During the hardening process of concrete Among them, because its surface and internal structure contain a large number of interpenetrating pores, during the ...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D7/61C09D7/63C04B41/68
CPCC09D1/04C09D7/61C09D7/63C04B41/5024C04B41/68C04B41/5018C04B41/5001C04B41/46C04B41/4896C04B41/4922
Inventor 潘崇根陈娜何静姿李旭臧家伟朱大勇陈景阳
Owner 浙大宁波理工学院
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