Concrete laitance enhancer and preparation method and application thereof

A technology of reinforcement and concrete, applied in the direction of coating, etc., can solve the problems of low heat resistance and low adhesion between layers

Active Publication Date: 2021-12-24
T&H NOVEL MATERIALS (SUZHOU) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome defects such as low interlayer adhesion and low heat resistance of existing concrete surface treatment agents in the prior art, thereby providing a concrete laitance reinforcement and its preparation method and application

Method used

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  • Concrete laitance enhancer and preparation method and application thereof
  • Concrete laitance enhancer and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0039] This embodiment provides a preparation method of concrete reinforcement, the specific preparation method is as follows:

[0040] Preparation of silanol monomers: add 100g of ethanol / water / ammonia (mass ratio 30 / 70 / 0.1) to a reactor equipped with stirring, thermocouple and dripping device, raise the temperature to 55°C, and start to drop 30g of vinyl Trimethoxysilane. Control the material addition rate to complete the addition within 3 hours, and control the temperature to 60°C. After the dropwise addition, continue to keep warm at 60°C for 3.5 hours to obtain the silanol sol, which is the silanol monomer.

[0041] Mix 100g of silicone acrylic graft copolymer (RS-996KD, MFT22°C), 10g of silanol monomer, 20g of epoxy silane monomer γ-(2,3-glycidoxy)propyltrimethoxysilane with Mix with 65g of water, and condense at 62°C for 1.5h to obtain the main ingredient;

[0042] 77g of main ingredient and 23g of curing agent (Beckocure EH623W) were packaged separately in proportio...

Embodiment 2

[0044] This embodiment provides a preparation method of concrete reinforcement, the specific preparation method is as follows:

[0045]Preparation of silanol monomers: Add 100g of ethanol / water / ammonia (mass ratio 30 / 70 / 0.1) to a reactor equipped with a stirring, thermocouple and dripping device, raise the temperature to 60°C, and start to drop 25 vinyl Trimethoxysilane. Control the material addition rate in 3.5 hours, and control the temperature at 65°C. After the dropwise addition, continue to keep warm at 65°C for 3.5h to obtain silanol sol.

[0046] Mix 100g of silicone acrylic graft copolymer (RS-996KD, MFT22°C), 15g of silanol monomer, 25g of epoxysilane monomer γ-(2,3-glycidyloxy)propyltrimethoxysilane with Mix 55g of water, and condense at 60°C for 2 hours to obtain the main ingredient;

[0047] 78g of main ingredient and 22g of curing agent (Beckocure EH623W) were packaged separately in proportion to obtain the concrete laitance reinforcement.

Embodiment 3

[0049] This embodiment provides a preparation method of concrete reinforcement, the specific preparation method is as follows:

[0050] Preparation of silanol monomers: add 100g of ethanol / water / ammonia (mass ratio 30 / 70 / 0.1) to a reactor equipped with stirring, thermocouple and dripping device, raise the temperature to 55°C, and start to drop 30g of vinyl Trimethoxysilane. Control the material addition rate to complete the addition within 3 hours, and control the temperature to 60°C. After the dropwise addition, continue to keep warm at 60°C for 4 hours to obtain silanol sol.

[0051] 100g of silicone acrylic graft copolymer (RS-996KD, MFT22°C), 5g of silanol monomer, 30g of epoxy silane monomer γ-(2,3-glycidoxy)propyltrimethoxysilane and Mix with 70g of water, and condense at 50°C for 2 hours to obtain the main ingredient;

[0052] 75g of main ingredient and 25g of curing agent (Beckocure EH623W) were packaged separately in proportion to obtain the concrete laitance reinf...

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Abstract

The invention belongs to the technical field of functional polymer materials, and particularly relates to a concrete laitance enhancer and a preparation method and application thereof. The concrete laitance enhancer is a graft copolymerization epoxy type concrete laitance reinforcer containing polyfunctional groups, the main agent is submicron grafted multifunctional resin with the particle size of 0.05-0.25 mu m, the silanol structural unit of the main agent has excellent permeability to laitance and the interior, and the silanol structural unit is coupled with surface OH to enhance the strength of a laitance substrate, the tensile cohesion strength of laitance on the surface of concrete is improved, the construction coating also has good strength when the laitance does not need to be polished clean in engineering application, the enhancer has good wetting adhesiveness to a concrete substrate and a subsequent coating, the adhesive force of the matched protective coating is larger than or equal to 1.5 MPa, meanwhile, the enhancer is a thermosetting coating film obtained through crosslinking, the heat resistance, temperature change creep resistance and heat resistance of the reinforcer are improved, and the coating temperature resistance requirement of 200 hours at the temperature of 120 DEG C can be met.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to a concrete laitance reinforcement and a preparation method and application thereof. Background technique [0002] Concrete laitance is a soft layer of material that floats on the surface of the castable material caused by bleeding when the cement hardens. The strength of the laitance is much lower than that of the concrete body. In engineering applications, in order to ensure good adhesion of the coating on the concrete surface, it is necessary to Grind the laitance clean. Slurry grinding has high work intensity and low efficiency, which greatly reduces the efficiency of coating construction. In order to reduce the grinding amount of laitance, and even to apply paint without grinding, it is currently a common solution to treat and strengthen concrete laitance with concrete surface treatment agents or interface agents. [0003] In the prior art, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/10C08G77/442C04B41/64
CPCC09D183/10C08G77/442C04B41/64C04B41/495C04B41/4938C04B41/4922C04B41/46C04B41/4892C04B41/488
Inventor 张武军谢燕华曹智毅彭家全王书传
Owner T&H NOVEL MATERIALS (SUZHOU) CO LTD
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