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A kind of high-strength cement-based composite photocatalytic material and preparation method thereof

A composite photocatalytic and cement-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high heavy metal content in graphite tailings, water retention and fertilizer conservation Low capacity, low utilization efficiency and other problems, to achieve the effect of easy pavement repair, long performance time and strong catalytic oxidation ability

Active Publication Date: 2021-11-30
HEILONGJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tailings have good water permeability and air permeability, the water is easily evaporated, the ability to retain water and fertilizer is low, and the nutrients are extremely poor
At the same time, due to the influence of fluoride, inorganic salt, washing oil and other chemical substances added in the washing process and the composition of the parent ore, the content of heavy metals in graphite tailings is high, and the pollutants seriously exceed the standard.
So far, the vast majority of graphite tailings have not been utilized, and the research on the comprehensive utilization of graphite tailings is still in its infancy. The utilization efficiency is not high, sufficient, and comprehensive enough to meet the urgent needs of urgent treatment.

Method used

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  • A kind of high-strength cement-based composite photocatalytic material and preparation method thereof
  • A kind of high-strength cement-based composite photocatalytic material and preparation method thereof
  • A kind of high-strength cement-based composite photocatalytic material and preparation method thereof

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specific Embodiment approach 1

[0017] Specific embodiment 1: In this embodiment, a high-strength cement-based composite photocatalytic material is made of graphite tailings, sand, cement, fly ash, silica fume and water; wherein the water-cement ratio is (0.3-0.5): 1; The mass of fly ash accounts for 10-20% of the total mass; the mass of silica fume accounts for 5-15% of the total mass; the mass ratio of cement to sand is 1:(1.4-1.6); the mass of graphite tailings accounts for the total mass 10-40% of that.

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that: the sand is medium sand with a particle size of 0.16 mm to 2.5 mm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the cement is Portland cement with a label of 32.5; the particle size of the graphite tailings is 0.2-0.4 mm. Others are the same as in the first or second embodiment.

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Abstract

A high-strength cement-based composite photocatalytic material and a preparation method thereof belong to the field of environmental protection building materials, in particular to a high-strength cement-based composite photocatalytic material and a preparation method thereof. The purpose of the present invention is to provide a kind of photocatalytic material for pavement and building wall, when applied to pavement, not only can catalyze the harmful gas in haze weather, but also can catalyze the harmful gas discharged from automobile exhaust in fine weather . The photocatalytic material is made from graphite tailings, sand, cement, fly ash, silica fume and water. Graphite tailings, sand, cement, fly ash and silica fume were used as raw materials for dry stirring for 2 minutes, and then water was added to continue stirring and mixing to obtain a mixture. The mixture was put into the mold and vibrated. After 24 hours, the mold was removed and the standard curing treatment was carried out. , a high-strength cement-based composite photocatalytic material was obtained. The material prepared by the invention is used for pavement and building wall.

Description

technical field [0001] The invention belongs to the field of environment-friendly building materials, and in particular relates to a high-strength cement-based composite photocatalytic material and a preparation method thereof. Background technique [0002] In recent years, the air quality index of many cities has "exploded", with heavy smog and poor visibility, which not only brings inconvenience to people's lives, but also brings great harm to people's health. The massive discharge of nitrogen oxides and sulfur oxides is one of the main causes of haze weather. [0003] Graphite is an important industrial mineral raw material and plays an important role in various industries. my country is rich in graphite resources, and its reserves account for more than 70% of the global reserves. The distribution of my country's graphite resources is highly concentrated, mainly in Heilongjiang, Inner Mongolia, Sichuan, Shanxi, Shandong and other provinces, of which the graphite reserves...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04B01J23/745
CPCB01J23/745B01J35/004C04B28/04C04B2111/00017C04B2111/00025C04B2201/50C04B18/12C04B14/06C04B18/08C04B18/146
Inventor 刘洪波潘凯赵艳陈瑶王钟锐佟瑶庞昭辉刘新月
Owner HEILONGJIANG UNIV
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