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Cement-based composite material containing sulfonated graphene (salt), and preparation method thereof

A technology of sulfonated graphene and cement-based materials, applied in the field of cement-based materials, can solve the problems of affecting the performance improvement effect of cement-based materials, affecting the performance of graphene-based materials, reducing the dispersibility of cement-based materials, etc. Effect of implementation, improvement of crack resistance, and improvement of flexural strength

Inactive Publication Date: 2018-05-08
SUZHOU GRAPHENE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, graphene has strong hydrophobicity, which requires long-term ultrasonication or the use of special dispersants, resulting in poor dispersion uniformity in cement-based composite materials, which seriously affects the performance of graphene-based materials.
Similarly, although graphene oxide is improved compared with graphene, its water dispersibility is still poor, and its concentration in water generally does not exceed 2wt%, and it is prone to the shortcoming of lamellar aggregation and superposition after placement, which seriously reduces the Its dispersion in cement-based materials affects its performance improvement effect on cement-based materials

Method used

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  • Cement-based composite material containing sulfonated graphene (salt), and preparation method thereof
  • Cement-based composite material containing sulfonated graphene (salt), and preparation method thereof
  • Cement-based composite material containing sulfonated graphene (salt), and preparation method thereof

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preparation example Construction

[0054] In some more specific embodiments, the preparation method may include: after mixing the cement-based material, adding water, admixture and sulfonated graphene (salt), stirring and transferring to a mold for molding, and After hardening, demould maintenance.

[0055] In the present invention, in addition to requiring it to have the ability to dry mix cement and aggregates and effectively stir the cement admixture containing the sulfonated graphene (salt) and the coarse aggregate added to the components of the cement-based material There is no particular limitation on the means (equipment) for adding the composition to the mixing water contained in the mixing system and stirring therein, except for the ability of the mixing system. Any of various mixers (mixing equipment) that have heretofore been used for producing cement-based materials such as concrete can be used without modification. As specific examples of the mixer, strong mixers, horizontal single-shaft mixers, h...

Embodiment 1

[0062] The preparation technology of the cement-based composite material that present embodiment contains sulfonated graphene (salt) is as follows: add water and 0.01% (accounting for cement mass ratio) sulfonated graphene (carbon / The molar ratio of sulfur is 6 / 1, the average thickness is 0.3-1nm, and the average sheet diameter is 30-50μm), after stirring, the mold is installed, and the molding, maintenance and testing are carried out according to GB / T17671, GB50081, GB / T50082, etc., sample number is 1.

[0063] As a comparison, the sample number without adding sulfonated graphene molded according to the above-mentioned same proportion and steps is 1'.

Embodiment 2

[0069] The preparation process of the cement-based composite material containing sulfonated graphene (salt) in this embodiment is as follows: add water and 0.001% (accounting for glue material mass ratio) sulfonation to the cement and mineral powder mixture that has been stirred with 0.5 water-binder ratio Graphene (the molar ratio of carbon / sulfur is 24 / 1, the average thickness is 10-30nm, and the average sheet diameter is 500-1000μm), after stirring, it is molded, and it is molded and maintained according to GB / T17671, GB50081, GB / T50082, etc. and testing.

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Abstract

The invention discloses a cement-based composite material containing sulfonated graphene (salt), and a preparation method thereof, wherein the cement-based composite material containing sulfonated graphene (salt) comprises a cement-based component and sulfonated graphene (salt) uniformly dispersed in the cement-based component, and the sulfonated graphene (salt) is selected from water-dispersiblegraphene covalently modified with a sulfonic acid group (salt). According to the present invention, the sulfonated graphene (salt) and the cement-based material are compounded to form the cement-basedcomposite material so as to improve various properties of the cement-based material, wherein the consumption of the water reducing agent can be reduced, the crack resistance and the compressive strength of the cement-based material can be significantly improved, the erosion damage on the cement-based material due to the invasion of various harmful mediums such as chlorine ions, carbon dioxide andsulfate ions can be effectively prevented so as to significantly increase the durability of the cement-based material, and other effects can be achieved; and the preparation process of the cement-based composite material is simple, and is suitable for large-scale implementation.

Description

technical field [0001] The present invention specifically relates to a cement-based material, especially a cement-based composite material containing sulfonated graphene (salt) (ie, sulfonated graphene and / or sulfonated graphene salt) and a preparation method thereof. Background technique [0002] As the most widely used composite material in the world, cement-based composite materials have the advantages of good plasticity, high strength and good durability. In practical engineering applications, cement-based composites face problems such as freeze-thaw, carbonization, chloride corrosion, sulfate corrosion, cracking, etc., resulting in performance degradation. With the development of cement-based composite materials industry and national infrastructure, the demand for high-strength and high-performance cement-based composite materials is increasing day by day, which is in contradiction with the lack of high-quality raw materials. Therefore, how to further improve the mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B22/14C04B24/16C04B103/30
CPCC04B22/14C04B24/16C04B28/00C04B2103/302C04B2201/50C04B18/141C04B18/08C04B18/146C04B24/24
Inventor 蒋永华栗建民郝建东高俊强
Owner SUZHOU GRAPHENE NEW MATERIAL TECH
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