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Graphene oxide modified cement-based composite material and preparation method thereof

A technology of graphene modification and composite materials, which is applied in the direction of climate change adaptation, etc., can solve the problems of ECC selection and performance defects, and achieve the effects of excellent strain hardening performance, high ductility, superior strain hardening performance and durability

Active Publication Date: 2016-02-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is aimed at the deficiencies of the prior art, and proposes a graphene oxide modified cement-based composite material and its preparation method that can solve the defects of traditional ECC in raw material selection and performance

Method used

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  • Graphene oxide modified cement-based composite material and preparation method thereof
  • Graphene oxide modified cement-based composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1-4

[0021] Concrete each embodiment carries out proportioning according to the parts of each component as shown in the table below:

[0022] project

Embodiment A1 / part

Embodiment A2 / part

Embodiment A3 / part

Embodiment A4 / part

cement

75

69

64

75

Quartz sand

150

173

194

160

fly ash

75

69

45

60

water

23

18

19

27

Graphene oxide

0.06

0.05

0.05

0.06

Polycarboxylate superplasticizer

0.4

0.6

0.5

0.7

polymer

22

28

30

28

Defoamer

4.5

5.0

2.0

2.6

polyvinyl alcohol fiber

4.9

4.9

4

4.3

Shrinkage reducer

2.2

1.5

1.0

2.1

[0023] The cement described in the present invention is ordinary Portland cement, and the fly ash is secondary fly ash; the polymer is a styrene-butadiene emulsion with a solid content ≥ 48%, a pH value of 9.0-10.0, and...

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Abstract

The invention relates to a graphene oxide modified cement-based composite material and a preparation method thereof. The graphene oxide modified cement-based composite material is prepared by mixing graphene oxide, polyvinyl alcohol fibers (PVA), cement, flyash, water, quartz sand, a polycarboxylate superplasticizer, a shrinkage reducing agent, a polymer and a defoaming agent according to a certain proportion. Compared with the prior art, the graphene oxide modified cement-based composite material has the advantages that the cement-based composite material has the advantages of higher compressive strength and breaking strength, low shrinkability, high toughness, high ductility, and the like compared with common ECC (engineered cementitious composite) and is especially suitable for repair and reinforcement of building structures with complex contours.

Description

technical field [0001] The invention relates to a graphene oxide modified cement-based composite material and a preparation method thereof, which belongs to a novel nano-modified cement-based composite material. technical background [0002] At present, the use of cement-based composite materials is very common, but there are many defects in itself. It has low toughness and high brittleness, obvious shrinkage and easy cracking. When it is impacted by external force or internal stress, it is easy to produce cracks. How to solve the defects of cement-based composite materials has become a hot issue. [0003] Adding an appropriate amount of fiber to cement-based composite materials can greatly improve the toughness and other properties of the material. People commonly use glass fiber, steel fiber, carbon fiber, polypropylene fiber, etc. Adding nano-materials to cement-based materials is a hot research topic now, which can increase the density and strength of materials, reduce ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/02C04B111/72
CPCY02A30/30
Inventor 李相国徐朋辉刘卓霖王冠东杨蓉笪俊伟蒋文广任钊锋
Owner WUHAN UNIV OF TECH
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