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Graphene concrete and preparation method thereof

A graphene and concrete technology, applied in the field of concrete, can solve the problems of complicated preparation process, insufficient mechanical properties, difficult large-scale preparation, etc., and achieve good stability, improve physical properties, and improve time-dependent effects

Inactive Publication Date: 2019-03-15
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0006] The present invention provides a kind of graphene concrete in order to overcome the shortcomings of insufficient mechanical properties, high cost, complicated preparation process and difficulty in large-scale preparation described in the above-mentioned prior art, and the graphene concrete provided has excellent mechanical properties, low cost, Capable of large-scale production

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  • Graphene concrete and preparation method thereof

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Embodiment 1

[0038] A kind of graphene concrete, its preparation process is as follows:

[0039] S1. prepare the graphene aqueous dispersion liquid that concentration is 0.6g / L.

[0040] After mixing 2.6028 kg of graphite flakes and 0.5206 kg of surfactant sodium cholate with 208 kg of water, they were exfoliated using a high-shear mixer at 5000 rpm for 2 hours. After the stripping was completed, the obtained suspension was decanted to obtain a graphene dispersion with a concentration of 0.6 g / L.

[0041] S2. Add 365 kg of cement, 730 kg of silica sand, 1095 kg of gravel, and 208 kg of graphene aqueous dispersion in the forced mixer, and stir for 10 minutes to obtain graphene concrete slurry. The cement is 42.5R ordinary Portland cement. Silica sand is made by mixing quartz sand in three particle size ranges of (800~400) μm, (400~200) μm and (200~100) μm at a mass ratio of 1:0.286:0.114. Crushed stones include two kinds of crushed stone particles of 5-10 mm and 10-16 mm; the mass fracti...

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Abstract

The invention discloses graphene concrete which comprises the following components in parts by weight: 350-400 parts of cement, 700-750 parts of fine aggregates, 1000-1150 parts of coarse aggregates and 200-220 parts of a graphene water dispersion, wherein the concentration of the graphene water dispersion is 0.55-0.65g / L; the graphene water dispersion is prepared from graphite sheets together with a surfactant by using a high shearing liquid phase peeling method. The graphene water dispersion in the graphene concrete disclosed by the invention is prepared from the surfactant by using the highshearing liquid phase peeling method, and the graphene concrete has the characteristics of being high in quality, high in yield and low in cost, and can be produced in a large scale in practical application. Due to the adoption of the high-quality defect-free graphene in the graphene concrete, the micro structure of a cement hydration product can be effectively regulated and controlled, and properties such as the strength, the permeation resistance and the durability of the concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, to a graphene concrete and a preparation method thereof. Background technique [0002] Advances in modern engineering are driving the development of ultra-high performance building materials. In particular, concrete is the most commonly used building material in the world. In order to improve the physical and mechanical properties of concrete, it needs to be improved at the nanoscale, so that its chemical and physical mechanical properties can be truly improved. Because most of the damage done to concrete can be traced to chemical and physical imperfections in the cement structure. The excellent chemical and physical properties of nanomaterials provide the most effective improvement for the internal matrix of concrete. In recent years, the nanotechnology of cement composite materials has made progress in the application of structural reinforcement, environmental pollution re...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/02C01B32/19
CPCC04B14/024C04B28/04C04B2201/50C01B32/19C04B14/06C04B14/02
Inventor 何建华谢建和黄亮刘迪李永超徐宝钦
Owner GUANGDONG UNIV OF TECH
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