Application of green building energy-saving new materials in urban development?

With the continuous progress of our society, China's economic level has also developed rapidly, which has significantly improved the quality of life of modern people. In this case, people naturally put forward higher requirements for the living environment. However, due to the great differences among different regions in China, if we want to provide residents with a comfortable and superior living environment, we must take corresponding measures in hot or cold areas, such as air conditioning or heating, which greatly increases the energy consumption in the construction process. Based on this, in order to implement the important policy of sustainable development, China must adopt green building energy-saving new materials in the development of modern cities to promote the rapid development of the construction industry.

1 Necessity of application of new energy-saving materials for green buildings in the development of modern cities

With the development of modern cities, problems such as serious pollution, high energy consumption and resource shortage are becoming more and more serious. Therefore, it is imperative to widely use new energy-saving materials in green buildings, which is of great significance to protect urban environment, alleviate energy shortage and improve environmental pollution. At the same time, vigorously promoting the use of new energy-saving materials in buildings can not only promote the development of related industries, but also further promote the stable development of modern urban economy in China. The application scope of new energy-saving materials in green buildings mainly includes building glass, roof, outer envelope and wall. The use of energy-saving and environmentally-friendly new materials is not only conducive to reducing energy consumption, but also conforms to the principle of using renewable resources, thus organically combining building comfort and energy saving, and further providing people with a better living and working environment.

2. The application atmosphere of green building energy-saving new materials in the development of modern cities

2. 1 application of green building energy-saving new materials in building roof

In the process of roof construction, energy-saving thermal insulation materials are widely used. For example, slab thermal insulation materials such as cement polystyrene board will be installed between the waterproof layer and the roof panel. For the selection of thermal insulation materials, it is necessary to strictly follow the relevant design techniques and requirements, especially to control the bulk density, water absorption, thermal conductivity and appearance of the materials, so as to provide a good guarantee for the strength of thermal insulation materials. At the same time, in the construction site of building engineering, we must pay attention to the waterproof and moisture-proof work of low-temperature materials, and if necessary, we can choose the trial matching method to carry out related work. At present, the roof energy-saving construction mostly adopts the inverted roof method, and the insulation layer is placed above the waterproof layer, which is completely opposite to the traditional building construction technology. Cement expanded perlite, rock wool and mineral wool are the main thermal insulation materials in building construction, and they all have water absorption. After moisture absorption, the thermal conductivity will increase, thus reducing the thermal insulation effect. Therefore, in the process of roof construction, if thermal insulation layer is set between steam barrier and waterproof layer, it will increase the complexity and cost of construction. However, if the waterproof layer is placed above the insulating layer, the insulating layer will be exposed, which will accelerate the aging speed of the insulating layer and reduce its service life. However, if a layer of protective measures is added to the waterproof layer, the project cost will increase, but compared with the two, it is more economical to set the insulation layer above the waterproof layer. Based on this, China should increase the application of green building energy-saving new materials in the development of modern cities, which can not only control the construction cost, but also improve the engineering quality.

2.2 The application of green building energy-saving new materials in building walls

In the past, traditional materials, such as brick, stone or concrete, were used to build walls, which not only did not have good thermal insulation effect, but also consumed more energy. Green building energy-saving new building wall materials, including rigid polyurethane, molded polystyrene foam board, etc. , with strong thermal insulation effect, so these organic thermal insulation materials have been widely used and popularized in the process of modern urban construction. At the same time, relevant construction personnel should also master these new construction technologies in time.

2.3 application of green building energy-saving new materials in building doors and windows

In view of the hot summer and cold winter areas, the application of green building energy-saving new materials in building doors and windows is of great significance and far-reaching, which is highly valued by the construction industry. In order to further realize the energy saving and environmental protection of building doors and windows, it is necessary to improve the overlapping of frames, glass doors and window frames and the sealing of joints, and strictly deal with joints, thus reducing air circulation. First of all, in the process of installing doors and windows, corresponding holes should be reserved to prevent the phenomenon of overlapping seams while installing and reversing the order of installation and overlapping seams; Secondly, in the design process of doors and windows, the overlapping part of the opening gap should be increased as much as possible to reduce the width of the opening gap. At the same time, in order to improve the tightness of doors and windows, polyurethane and other materials should be reasonably applied in the joints of walls and the gaps around external doors and windows, and mortar and cement should not be used; Finally, in the process of installing metal cabinet doors and windows, it is necessary to do a good job of broken bridge, including plastic and rubber, and choose the most appropriate length and width to ensure that there will be no broken bridge when installing accessories. It should be noted that enough space should be reserved for the metal frame door before the bridge is broken.

2.4 green building energy-saving new materials in the application of building envelope

The exterior of the building is mainly composed of roof and wall, and more than half of the energy saving of the building is reflected in the exterior of the building. Therefore, the application of green building energy-saving new materials outside the building is of great significance. At present, the application of energy-saving exterior protection materials in China is realized by curtain wall technology, which conforms to the concept of environmental protection and energy saving and can optimize the permeability and comfort of buildings. At the same time, some renewable resources can be applied to the periphery of the building, such as installing solar photovoltaic panels on the roof, which greatly optimizes energy consumption by converting solar energy into light energy.

3 common green building energy-saving new materials in the development of modern cities

3. 1 energy-saving glass

In green buildings, energy-saving glass exists as a main new energy-saving material, which has the function of heat insulation. At the same time, compared with ordinary glass, energy-saving glass has good radiation protection effect. At present, in the modern market, the types of energy-saving glass are diversified, among which antireflection film glass and single silver (double silver) LOW-E glass are the most widely used in buildings.

3.2 cement fiberboard

The advantage of cement fiberboard lies in its excellent fire prevention performance, which can effectively control the spread of fire. At the same time, this new type of green building energy-saving material will not leak out building materials such as screws and nails, so it is widely used in the field of green buildings. Cement fiberboard organically integrated a variety of fiber materials and mixed old and new materials, thus effectively improving the quality of new materials and making them tougher.

3.3 sunshade device

The climate in southern China is hot, especially in summer. In order to relieve the heat, people usually use air conditioners every day, which aggravates energy consumption. Therefore, it is not only practical but also economical to reduce energy consumption by building shading devices in southern buildings with high climate. It should be noted that during the period of green building, temporary and permanent sunshade devices depend on the requirements of local rooms and climate characteristics. The temporary sunshade device is mainly used to install various plastic, metal and portable curtains at the window; Permanent sunshade device is to install various forms of awnings. In addition, the effect of the sunshade device can also be achieved through the application of heat reflective glass materials.

3.4 Environmental protection and flame retardant honeycomb composite wall materials

At present, a new building energy-saving material-environment-friendly, flame-retardant honeycomb composite wall material is a new building material, which uses the fruits of renewable energy, and mixes binders such as cinder and straw with cement and waste, stirring and compressing them. Its advantage is that it can effectively protect the urban environment and reduce the discharge of waste to a certain extent. At the same time, the material can make rational use of waste, and the amount of cement and steel bars required is relatively small, which reduces its energy consumption. Therefore, new materials are widely used in the construction industry.

3.5 Building insulation board and antibacterial materials

In the process of building roofs, it is usually used as insulation board material. Building insulation boards are mainly composed of two sides and interlayers. Building insulation board materials are mainly used in commercial buildings and residential buildings, with a wide range of applications. In addition, the construction technology of this material is simple, and it has a good thermal insulation effect, thus greatly reducing the construction cost, improving the pollution problem, and fundamentally achieving the purpose of energy conservation and environmental protection. On the other hand, antibacterial materials are environmentally friendly. Because of the traditional buildings in China, some bacteria often breed in the application of materials, which has a serious impact on the life of urban residents. The use of antibacterial materials can not only inhibit the reproduction and growth of microorganisms, but also have a self-cleaning effect, which meets the health and safety requirements of green buildings.

4 green building energy-saving new materials development path

The research on new materials and technologies of green building in China should not be limited to writing. At present, China has taken green building as a long-term development strategy, which is also the mainstream direction of the future development of the construction industry. Therefore, China should vigorously promote green buildings and integrate the forces from all walks of life, so as to significantly improve the development efficiency of new energy-saving materials for green buildings. First of all, the government of China should vigorously publicize the education of developing new energy-saving materials for green buildings, so as to make the concept of green energy-saving buildings deeply rooted in people's hearts and realize that the application of new energy-saving materials for green buildings is an important channel for future generations to seek happiness. Secondly, the government should vigorously promote and standardize the "green building" logo, quantify the indicators of land saving, water saving, energy saving, indoor environment, material saving and ecological environment impact of buildings, and determine their standard values. Through the introduction of relevant policies, the important purpose of awarding the standard "green energy-saving building" logo is realized, thus promoting the further development of green buildings in China. Finally, promoting green buildings is not only the responsibility and obligation of the government, but also the joint efforts and participation of the whole people. Therefore, China citizens should pay close attention to green buildings and building energy conservation, and widely apply new technologies for building energy conservation, so as to promote the efficient development of green building energy conservation new materials industry.

In a word, the development of modern urban architecture in China should fully implement the concept of environmental protection and energy saving. The application of green building energy-saving new materials not only has the characteristics of cost economy, but also has high recovery rate, thus exerting its environmental protection efficiency and effectively improving urban pollution problems. In today's energy shortage, the widespread implementation of green buildings in the construction industry can further promote the healthy and comprehensive sustainable development of modern cities.

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