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Environment-friendly graphene oxide modified ultra-high performance concrete and preparation method thereof

An ultra-high performance, environmentally friendly technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of low buckling ratio and toughness of concrete, avoid environmental pollution risks, save costs, and improve buckling. The effect of ratio and toughness

Active Publication Date: 2020-03-27
重庆高途新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the folding ratio and toughness of this ultra-high performance concrete are relatively low

Method used

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  • Environment-friendly graphene oxide modified ultra-high performance concrete and preparation method thereof
  • Environment-friendly graphene oxide modified ultra-high performance concrete and preparation method thereof
  • Environment-friendly graphene oxide modified ultra-high performance concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Comparison of the influence of the addition amount of graphene oxide in environmentally friendly graphene oxide modified ultra-high performance concrete.

[0028] Including cementitious materials consisting of 401.50 parts of cement, 159.40 parts of silica fume, 318.79 parts of fly ash, and 82.71 parts of slag powder, quartz sand composed of 543.96 parts of coarse quartz sand, 391.65 parts of medium quartz sand, and 315.5 parts of fine quartz sand, It also includes 80 parts of steel fiber, water, graphene oxide and polycarboxylate high-performance water reducer, the mass ratio of water to cementitious material is 0.16, and the mass of graphene oxide is 0.01-0.03% of the mass of cement The mass of the polycarboxylic acid high-performance water reducer is 0.3% of the mass of the gelling material.

[0029] Concrete selected raw material ratio is as shown in Table 1:

[0030] Table 1

[0031]

[0032] Step by step to make ultra-high performance concrete:

...

Embodiment 2

[0045] Example 2: Comparison of the influence of the addition amount of graphene oxide in environmentally friendly graphene oxide modified ultra-high performance concrete.

[0046] According to the proportion of raw materials as shown in Table 3:

[0047] table 3

[0048]

[0049] Four groups of ultra-high performance concrete were prepared, and group 5 did not contain graphene oxide. The 7-day and 56-day compressive strength tests, and the 7-day and 56-day flexural strength tests were carried out on the 4 groups of concrete samples respectively. The results are shown in Table 4.

[0050] Table 4

[0051]

[0052] The results are similar to Example 1, that is, under the same steel fiber ratio, the appropriate amount of graphene oxide increases the compressive strength, flexural strength and folding ratio of concrete. However, when the content of graphene oxide is 0.03%, the compressive strength, flexural strength and folding ratio begin to decrease, so the optimized ...

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Abstract

The invention discloses an environment-friendly graphene oxide modified ultra-high performance concrete. According to the parts by mass, the raw materials include 945.86-962.40 part of cementitious material and 80-120 parts of steel fiber and also include water, quartz sand, graphene oxide and polycarboxylic acid high performance water reducing agent, wherein the mass ratio of the water to the cementitious material is 0.16, the mass ratio of the quartz sand to the cementitious material is 1.3, the mass of the polycarboxylic acid high performance water reducing agent powder is 0.3% of the massof the cementitious material, the cementitious material consists of 394.60-401.50 parts of cement, 156.66-159.40 parts of silica fume, 313.31-318.79 parts of fly ash and 81.29-82.71 parts of slag powder, the mass of the graphene oxide is 0.01-0.03% of the mass of the cement, and the solid amount of the polycarboxylic acid high performance water reducing agent is 0.3% of the mass of the cementitious material. The concrete is modified by graphene oxide while adding mineral fine powder. The higher content of mineral fine powder greatly reduces the content of cement and silica fume, while the graphene oxide modification effectively improves the folding-compression ratio and toughness of the concrete accordingly.

Description

technical field [0001] The invention relates to the technical field of concrete production, in particular to an environment-friendly graphene oxide modified ultra-high performance concrete and a method for preparing the concrete. Background technique [0002] Ultra-high performance concrete, referred to as UHPC (Ultra-High Performance Concrete), also known as reactive powder concrete (RPC, Reactive Powder Concrete), which includes two aspects of 'ultra-high' - ultra-high durability and ultra-high mechanical properties Performance, specifically including: compressive strength 120-230 MPa, flexural strength 30-60 MPa, elastic modulus 40-60GPa, fracture toughness 20-40KJ / m 2 , Creep coefficient 0.29-0.31 (during heat curing), chloride ion diffusion coefficient <0.02×10 -12 m 2 / s, freeze-thaw peeling <7 g / cm 2 , water absorption characteristics < 0.2kg / m 3 , wear coefficient<1.3, impermeability grade>P35, compressive specific strength equal to about 6.5, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/02C01B32/198
CPCC01B32/198C04B14/024C04B28/04C04B2201/50C04B2201/52C04B14/06C04B14/48C04B2103/302C04B18/146C04B18/08C04B18/141
Inventor 吴玉友邱文俊文安陈松刘长江郑周练
Owner 重庆高途新材料科技有限公司
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