New materials in building energy efficiency and quality problems in the application of

Abstract: The new energy efficient building materials, new technologies, new techniques, innovative construction Technology to bring a profound impact, the article mainly construction of new materials in energy saving engineering quality problems common to the Research and Analysis in theory and made our approach.

Keywords:: new materials; new Technology; new Technology; building energy efficiency

With the rapid development of science and Technology, construction Technology in China has been greatly improved accordingly. The current competitive construction market, in order to open up the market a firm footing, seek greater development, it must rely on technological innovation to enhance strength of enterprises, to ensure the construction of the key technologies, materials, technology, equipment closely follow the international trend, with the same level in the industry, by increasing technology content to improve project quality, reduce production costs and create the best results.

Mainly by the energy consumption in buildings constitutes a building envelope materials and building of energy-using equipment, due to the requirements of building energy efficiency, both of construction technology, profound changes have taken place. In retaining wall structure body into a wall insulation, roof insulation into the roof, doors, windows and curtain wall insulation is not only required but also added some shading system, floor, floor insulation or heating and cooling to increase the system: not only to improve the efficiency of the equipment and the gradual development of renewable energy and new energy. Therefore, the appropriate construction technology should be with the times.

An energy-saving wall of the construction requirements of new technologies
1.1 wall insulation, mostly inorganic and organic composite materials
Wall envelope of traditional, mostly composed of inorganic materials, such as brick masonry, concrete, cement mortar, etc., and now the need for energy-saving insulation, the introduction of a large number of organic materials such as molded polystyrene foam insulation board, extruded polystyrene ethylene foam, polyurethane foam, as these organic insulation materials, thermal performance than traditional wall materials, insulation properties strong, so the organic insulation materials in building envelopes widely used in energy, forming a kind of inorganic and organic materials composite wall, the construction process so that proposed new requirements. typical wall insulation, organic and inorganic composite materials made of white, and this addition to the traditional load-bearing walls, sound insulation requirements, also increased the heat insulation requirements. requires combination of inorganic and organic materials as a whole, in the natural environment can work together, so the composition of the wall material properties and construction techniques with new requirements, such as plaster and then not in the traditional sense cement mortar plastering, wall putty putty is not common, but also from the cement mortar coating the wall tiles are not attached to traditional wall construction techniques had a profound change.

1.2 crack resistance insulation wall demanding than the traditional wall
And structure of materials science and learn to see, the traditional inorganic materials is a common wall cracks and allowed, as long as does not affect the structural safety, and energy-saving insulation works are higher. First, the composition of inorganic and organic materials in the compound wall is easy cracks; Second, thermal insulation system of external finishes and protective layer of relatively poor use of the environment; third is the material thermal conductivity and humidity affect the insulation properties. cracking of the wall thermal insulation is a key technology to solve because Once the insulation layer, protective layer cracking cracking, wall insulation performance will be changed significantly, not only can not meet energy requirements, or even endanger the safety of the wall.

According to engineering practice and statistics, especially temperature deformation cracks cracks or deformation force by the interaction of deformation and cracks in the wall produced by almost all can be met more than 80% of fractures due to impact, wind pressure, earthquake forces and other external causes small proportion of the mechanical damage, so the key is to control the cracks should be controlled under the constraints (constraint body and the body can be bound to a certain degree of deformation) material deformation does not exceed the limit deformation of the material itself. This tensile stress is not tensile strength over time to the conclusion that unity.

Many factors affect the crack from the surface mortar cracking and enhanced network protection layer consisting of the crack resistance of the whole system plays a more crucial role. Limit the flexibility of surface mortar tensile deformation should be greater than the worst case of its own deformation (shrinkage deformation, chemical deformation, deformation humidity, temperature, deformation) and the primary deformation and, thus ensuring crack crack shielding requirements. composite surface mortar in the enhanced network (such as glass fiber mesh cloth), a side can effectively increase the tensile strength of crack shielding the other hand, can effectively disperse the stress, you can crack the original may have a wider (harmful cracks) dispersed into many smaller cracks (crack sound) to form the concrete cracking. surface coated plastic material and the amount of the early fiberglass alkali resistance mesh fabric has a more important meaning, and alkali resistance of glass fiber varieties of long-term decisive.

Particular emphasis on site preparation of the ordinary cement mortar in the insulating layer is not easy to solve crack problems. Considerable shrinkage of cement mortar, and insulation materials work together. Since the contraction and expansion properties of their respective differences in the surface prone to the junction crack. Therefore, the traditional cement mortar plastering materials in organic insulation is easy to crack, can not play a protective role of thermal insulation material does not wet. reposted elsewhere in the Research Papers Download http://www.hi138.com 2 doors and windows, transparent walls and shading system construction
Transparent envelope of insulation, in addition to the glass and box fans to improve their thermal performance and to ensure airtight hollow glass, but also with the glass and frame joints, and joints tight box fans take a close degree of relationship. Only the part of the joints tight enough to ensure that as much as possible to reduce air infiltration and air infiltration is an important way of energy loss.

Airtight construction is generally used to improve a variety of seal or seal to resolve. All kinds of doors and windows wide range of sealing strips should be designed with the combination of type window. The best type of window or curtain wall is designed at the same time design supporting the seal, if necessary, needs lot of sealing. and must use good elasticity, aging resistant materials, EPDM and Neoprene generally appropriate, poor seal will fail prematurely aging, will give the user with to great inconvenience and economic losses. sealed glass bead mosaic addition, the use of glass, plastic or both are often used in conjunction. glass curtain wall, hidden frame glass curtain wall in particular, greater use of silicone gel, but Special attention should be sealant in contact with the glass and supporting materials compatibility, otherwise it will result in seal failure, or even a serious security risk.

In addition to its sealed windows and outside walls, windows and walls can not ignore the contact area of ​​the seal and waterproof, long time, in residential buildings, has been using cement mortar to plug the window frame and wall joints is wrong, mortar shrinkage, the gap will inevitably lead to air infiltration. especially the alkaline cement mortar water will cause corrosion aluminum alloy frame material role in accelerating the window damage. the right approach should be in the box in contact with the wall, fill in the gap highly efficient thermal insulation materials (such as polyurethane foam, etc.), and then in the windows and walls on both sides of the junction, closed with a sealant to prevent water intrusion. household doors and balcony doors filled with polystyrene board should use the door or rock wool board , and with fire, water requirements combined.

Doors and windows and curtain wall structure and improve the building envelope level of integration of energy-saving technologies, improving the overall energy saving wall. Focus on resolving the windows and doors, curtain wall anchor and fill technology and the use of solar energy, air power saving technologies. Major termed the emergence of a new public building as a "double skin" of the wall structure, that is outside the window or outside wall and then set up a layer of glass curtain wall, usually as a single glass outer layer, inner layer of insulating glass, the distance between two layers of 20 cm ~ 60 cm range . each building, the outer layer of glass on the bottom are equipped with adjustable air vents. winter sunlight, you can open the window of the outer wall and inner bottom of the top vents, so that was between two layers of glass sun heated air into the room, reducing heating energy consumption. The summer may be the outer layer, the bottom vents are open, so that the air layer between two layers of the wall, in the sunlight upward to form a good circulation flow, the distribution of hot air out, reducing the temperature of the inner window surface, thereby reducing the cooling indoor air conditioning load. If in the double walls between the addition of adjustable blinds, its increased comfort and energy saving effect is more significant the .

3 Conclusion
In short, the use of energy efficient building construction a large number of new materials, new technologies, new techniques, innovative construction technology which gives a profound impact. These are only of external wall insulation, new energy-saving windows and doors and other examples of new technologies, from which have been read to the construction technology and traditional construction techniques of different, I think that the implementation of energy efficient building envelope construction of buildings will bring great changes, part of the construction techniques and standards should be followed to make the appropriate changes.

In recent years, construction of new areas of emerging technologies and new techniques to traditional construction techniques brought a greater impact, a series of new technologies, not only the traditional construction techniques to solve technical bottlenecks can not be achieved to promote and guide new construction equipment and construction craft, and new construction technology makes the construction of efficiency has been raised. With the continuous development and progress, there will be more new technology, new equipment and new materials, To be creative and bold application, combined with modern scientific management, in building construction continue to achieve good results in production. Meanwhile, in order to continuously push forward the construction of technological progress, promoting the construction industry to increase the intensity of advanced and applicable technologies, the construction of new technical content should be adjusted and supplemented, and constantly adapt to new requirements of development of productive forces and achieve sustainable development of enterprises.


References
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