Review on the Protection of Water Permeable Brick to Freshwater Resources and Urban Ecological Environment

In recent years, the world has paid more and more attention to the topic of "sustainable development. This makes the problem that a large number of fresh water resources cannot be used due to the wanton discharge of agricultural, industrial and domestic wastes. For large cities, because the urban ground is mainly paved with cement or asphalt, the urban heat island effect has become more and more obvious in recent years. At the same time, the surface is isolated and long-term contact with water caused by the subsidence of the ground, is not conducive to surface water circulation.

 

The new material permeable brick can effectively alleviate and change the current situation, which itself is made of building waste materials, a large area of flat on the urban road surface, can prevent rain can not penetrate into the surface and underground, and the groundwater to give timely supplement.Moreover, the pollution degree of rainwater will be greatly reduced after the multi-layer filtration of the permeable brick and the surface layer, and the remaining pollution components can be degraded by natural microorganisms.

 

 

1

Now permeable brick and its use

 

Classification of 1.1 permeable bricks

Permeable bricks can be generally divided into sintered permeable bricks and non-sinteringTwo categories of permeable bricks, of whichsinteringPermeable brick is mainly based on industrial, construction, life generated garbage raw materials, through crushing, forming, high temperature firing with permeable brick performance of building decoration materials; another type of mainly inorganic non-metal as the main material, through the binder bonding, mold reinforcement, drying and other environmental protection process molding. Because there is no need to sinter molding, solid called non-sinteringPermeable brick.

 

In addition, permeable bricks can also be classified from the performance and use function, which can be divided into permeable bricks that are permeable to water and permeable bricks that are impermeable to water or only permeable or weakly permeable to water.

 

Environmental Protection of 1.2 Permeable Brick Production

The permeable brick is mainly the secondary utilization of tailings waste, fly ash, construction waste, etc., and is a real green environmental protection product. The amount of garbage produced in our country every year in construction is staggering,About 1.55 billion -2.4 billion tons, and the number is still increasing year by year; however, in developed countries, the resource utilization rate of construction waste can reach an average of 90%, while the current resource utilization rate of construction waste in my country is less than 5%.

 

[2] Through the promotion of the use of permeable bricks, construction waste can be used effectively, which can not only solve many problems brought to people at present, but also reduce the negative impact on the ecological environment caused by mountain quarrying and so on. The use of permeable bricks can also achieve the purpose of energy saving, emission reduction and resource recycling. Therefore, the recycling of construction waste and the production of permeable bricks for construction waste is very urgent and necessary.

 

1.3 Current status of the use of permeable bricks at home and abroad

In view of the negative impact of urban impervious land on groundwater resources, Germany put forward the "stormwater plan". The plan is mainly to change most of the city's ground to permeable ground. LordRainwater utilization projects should be designed for new residential areas, whether industrial, commercial or residential. If there are no rainwater utilization measures, the government will levy rainwater drainage facilities fees and rainwater discharge fees.

 

Xi'an, a famous city in China, is also one of the most widely used cities in China.The current goal of Xi'an and several cities is to be able to build themselves into a "sponge city",In order to transform the city into a "sponge city", permeable bricks play a "lung" function in this process.

 

 

2

 

How to alleviate the destruction of water resources and ecological environment

 

2.1 urban runoff water pollution

In recent years, urban highway runoff pollution has become more and more serious, especially motor vehicle oil leakage pollution, heavy metal pollution and organic pollution. These pollutants are washed into the sewers by rainwater, and then into rivers and lakes. The required sewage treatment is very expensive, and the treatment cost is also extremely expensive.

 

2.2 reduce the pressure of urban drainage system

At present, there are various problems in the sewer pipes laid in urban construction, such as poor drainage in some areas and stagnant water, which brings great inconvenience to people's lives. Due to the damage of the sewer pipe material and the decline of its function, it is no longer possible to solve various problems such as urban drainage and flood control. Whenever it encounters heavy rain, the rainwater runoff generated far exceeds the bearing capacity of the urban sewer pipe network design. Therefore, "watching the sea" in major cities is by no means a fantasy. It is mainly caused by various tragedies caused by the serious inability of the urban drainage system to meet the discharge of rainwater.

 

 

 

Regulating Ability of 2.3 Permeable Brick to Ecosystem

Permeable brick is a green environmental protection new building material product born to maintain the ecological balance of the city. Its main purpose is to solve many problems caused by urban surface hardening and create a high-quality natural living environment.

 

 

Permeable brick is characterized:

First, it has a very good permeability and permeability, rainwater through the permeable brick quickly seeps into the ground, can be timely supplement of soil water and groundwater;

 

Second, permeable bricks play a greater role in regulating the temperature and humidity of the local space on the surface and alleviating the urban heat island effect;

 

Third, rainwater seeps into the ground through permeable bricks, which can greatly reduce the pressure of urban drainage and flood control, and at the same time, it can act as a filtering device to further reduce water pollution;

 

Fourth, after using permeable bricks, there will be no water accumulation on urban roads after rain, which is convenient for travel and improves our quality of life;

 

Of course, what is mentioned is only a small part of the advantages brought by permeable bricks, which will have a more profound impact and irreplaceable role in the future urban construction and improvement of residents' lives.

 

 

3

How to alleviate the destruction of water resources and ecological environment

 

As a new type of green environmental protection material, permeable brick can greatly alleviate the problem of urban surface hardening, maintain the balance of urban ecological environment, and create a high quality natural and living environment.

In addition to this, itsIt also has the characteristics of moisturizing, high strength, absorption and noise reduction, effective anti-skid and cold resistanceThe main raw materials can be slag waste or waste ceramics, etc., and the reasons for its attention are also various:

It can make the rainwater penetrate the surface quickly, replenish the moisture and groundwater in the soil, improve the living conditions of plants in various cities, and enrich the microorganisms in the soil;

 

It can adjust the urban microclimate, greatly alleviate the urban heat island effect and can alleviate the pressure of flood control and drainage in various cities, reduce road water accumulation and reduce water pollution in public waters;

 

It is convenient for urban residents to go out. The concave and convex surface of permeable brick can prevent road surface reflection and absorb the noise of walking vehicles to improve travel comfort. Moreover, it has various colors and specifications, is simple and natural, and is very economical.

 

References

[1] Ma Yangzhi. Production technology and development prospect of permeable brick [J]. Bricks and tiles, 2004(7):47-49.

[2] Li Yao, Qin Jiaqi. China produces more than 1.5 billion tons of construction waste every year and the recycling rate is less than 5%[N]. People's Daily, 2016.

[3] Zuo Fuyun. Application of construction waste in permeable brick and urban road [D]. Kunming University of Science and Technology, 2008:1-71.

[4] Zhang Zezhong, Wang Haichao, Liu Guangzhu. Regulation, utilization and management of urban stormwater [M]. China Water Conservancy Press, 2013:1-13.

[5] Sun Changlei. Study on urban rainwater utilization zoning and water quality of rainwater runoff from different underlying surfaces in Xi'an [D]. Xi'an University of Technology, 2005:1-89.

About the author: Huang Zhiyong (1996,6-), male, from Guangyuan, Sichuan, Jiangxi University of Science and Technology, School of Civil Engineering, bachelor's degree.