High-strength cement-based composite photocatalytic material and preparation method thereof

Abstract

The invention discloses a high-strength cement-based composite photocatalytic material and a preparation method thereof, belongs to the field of environment-friendly building materials, and particularly relates to a high-strength cement-based composite photocatalytic material and a preparation method thereof. The invention aims to provide a photocatalytic material which is used for pavements and building walls, and when the photocatalytic material is applied to the pavements, not only can harmful gas in haze be catalyzed in haze weather, but also harmful gas exhausted by automobile exhaust canbe catalyzed in sunny weather. The photocatalytic material is prepared from graphite tailings, sand, cement, fly ash, silica fume and water. The preparation method comprises the following steps: subjecting the graphite tailings, the sand, the cement, the fly ash and the silica fume as which are adopted raw materials to dry stirring for 2 minutes, then adding water, continuously stirring and uniformly mixing the materials to obtain a mixture, putting the mixture into a mold, vibrating the mold, demolding after 24 hours, and carrying out standard maintenance treatment to obtain the high-strength cement-based composite photocatalytic material. The material prepared by the invention is used for pavements and building wall surfaces.

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...

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.

Images