Papers Category:Engineering Papers
- Materials Engineering Papers
Post Time:2011-11-24 10:44:00
Paper Keywords: energy saving strategy of building materials Abstract: The environmental status of energy-saving building materials were reviewed research on the development of environmentally friendly energy-saving building materials, the application was predicted that green building materials is currently the world's energy-saving hot issues of common concern, environmental protection and energy-efficient buildings high-tech materials and new materials development is inseparable from the application.
Building materials production and processing industry is a typical energy-based industries, its production and processing is not only energy intensive, but also pollute the environment, according to statistics, the building materials industry in 2005 the country's total energy consumption of various types of total energy consumption 7%, the resulting dust and industrial dust emissions, respectively, and the country's total emissions by 63% and 8.5% among the nation's industry's first and second place. Thus, energy conservation work in the country , the building materials industry has a pivotal role. Thus, the development and promotion of environmentally friendly energy-saving building materials is imperative.
To achieve environmental protection energy-saving building materials, it must be integrated into building materials production and use of energy, maximize the use of industrial waste as raw material, material costs in the guaranteed under the conditions of a good selection of building materials insulation effect. Green energy construction materials with minimal information, and make full use of agricultural and industrial waste and recycled materials to create high-performance materials in the production process but also to minimize air pollution and energy consumption.
An environmentally friendly energy-saving building materials development and application status
1.1 the development of environmentally friendly energy-saving building materials Status
1.1 1 waste plant fiber Waste plant fiber is a kind of multiple use of renewable biological resources, mainly refers to the straw, waste wood, waste bamboo, etc.
China is a large agricultural country, crop stalks and other waste plant fiber resources are very rich.
Waste plant fiber has many good performance, environmentally friendly energy-saving building materials in the development and application has great performance potential.
Compared to other building materials, the plant with straw as raw material fibers made from block processing quick and easy, no environmental pollution, can be called green energy-saving materials, use it to build more buildings can be said to have eco-building is one hundred percent, but because the characteristics of the material itself, for the building has some limitations, the current building can not be used for more than two load-bearing components needed, but for the present needs of a wide range of private residential and small public building block is very suitable for straw, but also to meet the current mentality of the people respect for nature. 1 1.
Gypsum building materials have advantages: 1) the calcined gypsum is relatively low energy consumption (cement only 1 / 4 lime 1 / 3), which use gypsum construction materials can significantly save energy; 2) gypsum than bricks concrete are saving materials; 3) with gypsum building materials can be recycled nature, no construction waste; 4) non-toxic plaster, has good heat resistance, fire resistance of fly ash .1 .1.3 Thermal power plant pulverized coal boiler fly ash is an industrial waste discharge.
China's emissions of fly ash in 2000 160 million t, and is constantly on the rise every year, a large fly ash stacking area, and the threat to the environment, disposal Fly ash is an effective way is to fly ash used in building materials. the use of fly ash instead of part of the earth He made brick, hollow brick, tile and ceramic sintering fly ash, etc., while the production of ceramic mixed with fly ash quality products is a promising new type of environmentally friendly energy-saving building materials.
1.1 .4 foam glass
Foam glass is a set of environmental protection, thermal insulation, fire-retardant, moisture barrier, sound absorption in one of the new building materials. The raw material is waste glass bottles of various colors, or flat pieces, belonging to recycling; products has significant environmental benefits; production process does not have a 'waste.'
Foam glass has a light weight, high compressive strength, low thermal conductivity, good fire resistance, water impermeability capacity, and high chemical stability, is both heat and cold of the materials present, foam glass, widely used in the kinds of places, such as place of brick and block, as roof, wall, ceiling material and insulation components.
1.1 .5 membrane material
Building composite membrane material has good transparency, low density, high mechanical strength, durability, fire protection, thermal insulation and anti-ultraviolet and other excellent features, and thus become a new generation of environmentally friendly energy-saving building materials. For the construction of a wide range of membrane materials , according to the different materials can be divided into two categories: 1) PTFE membrane material class, the resin content greater than 90%; 2) PVC type film material.
Membrane of natural light transmittance up to 20, even for high performance thermal insulation layer membrane construction, the light transmission rate of 4% to 8% of light transmission within the membrane structure to produce uniform diffuse incident light, no shadows, no glare, during the day to meet the needs of a variety of indoor activities, which can save a lot of electricity for lighting. membranes have a high reflectivity and low absorption rate, and low thermal conductivity, which largely prevented the solar radiation into the room, reducing heat transfer, with good thermal insulation properties. membrane chemical stability, will not pollute the environment and cause harm to humans, as a green membrane building materials in developed countries has been vigorously promoted and applied. Links to free download http://eng.hi138.com
1.1 .6 other environmentally friendly energy-saving building materials
A nano microencapsulated phase change material can be used as a new type of environmentally friendly energy-saving building materials, the main component of nano-and micro-capsules of phase change materials. Nanometer catalyst in the light, can kill the virus, eliminating VOC and inorganic gases , unreasonable people in the case of outdoor fresh air to effectively improve indoor air quality, reduce energy consumption of air-conditioning systems; the same time, microencapsulated phase change material through the phase change material's molecular structure changes occur rapidly, in a constant temperature under the endothermic or heat, the outside temperature changes can effectively maintain the stability of the indoor thermal environment, reducing energy consumption, to achieve the purpose of building energy efficiency.
1.2 environmental protection energy-saving building materials application status
1.2.1 for wall and building envelope energy-efficient building materials, environmental protection
Energy-saving building materials must be balanced with the external walls of a suitable heat storage capacity and good thermal insulation properties, the compound wall is preferred.
Hollow block and brick is used, a good energy-saving wall materials in hollow block wall can be added to fill the gap in the expanded perlite, bulk or bulk mineral wool loose fill insulation, such as cotton materials, reducing the thermal conductivity and wall heat transfer between the role of block addition, compressed air flocculent with high block of glass wool or blown cavity wall, filled with dense, also can play a very good insulation. Application of more energy-efficient building materials along the wall of aerated concrete.
Aerated concrete is an excellent low-power energy-saving new wall insulation materials, all wall material is only 65% ??to meet energy efficiency standards required by a single material. It has been widely used inside and outside walls, roof, floor sloping roof of peace, not only for civilian residential buildings, and can be widely used in industrial buildings and four-layer structure of these hybrid body construction of the load-bearing walls.
For the building envelope, you can use light and efficient glass wool, rock wool, foam and other insulation materials to reduce building energy consumption.
1.2.2 for roofs, floors, windows and doors of the environmental protection energy-saving building materials
For energy-saving building materials green roof with glass wool or mineral wool mat (mat), these insulation materials made of composite veneer with decorative ceiling, attic space and roof to reduce heat transfer coefficient between the ceiling, heat insulation insulation effect.
China's total energy consumption of high-energy doors and windows in the building about 40% of the total energy consumption and therefore energy-saving windows and doors of the environmental protection is particularly important plastic door and window insulation performance than common steel, wood, aluminum doors and windows are much better; the same time the production process of plastic doors and windows the use of cleaner production technology, use less natural energy to produce windows and doors non-toxic, non-polluting, non-radioactive, conducive to environmental protection and human health, in line with people's 'green building' concept, which is environmentally friendly energy-saving plastic windows and doors building materials.
2 green energy-saving strategies for future development of building materials
Development of environmentally friendly energy-saving building materials, a fundamental change in China's building materials industry in the Development of the high input and low output, high consumption, high pollution and low efficiency of the extensive mode of production, select a resource-saving, low pollution type, quality and efficiency, Pilot-based approach to development, the development of building materials and resource use, ecological protection, pollution control organically combined, this is the 21st century, the development of China's strategic goal of building materials.
China's building materials industry, the strategic direction of future development should be: to develop environmentally friendly energy-saving building materials, using low energy manufacturing process and production technology does not pollute the environment, try not to use contain harmful, organic chemicals, taking into account the production and recycling of recyclable , adhere to the resource-saving and environment-friendly sustainable development.
Building materials, green energy is an important national policy and implementation of sustainable development an important scientific concept of development policy of environmental protection energy-saving building materials is not only an economic issue, more important is the development of a national strategic issues the Government, the media has a responsibility and obligation to guide the consumer, the only way China's environmental protection energy-saving construction of the road to the development of more open. Construction administrative departments should strengthen supervision, so that environmental protection energy conservation have been implemented, so that building really reduce energy consumption, save money, conserve resources and environmentally friendly purposes. Building energy-saving society, and everyone's effort and participation, health , comfort, low energy buildings have mushroomed in the motherland, for the benefit of the people, for the benefit of society. Links to free download http://eng.hi138.com