Building thermal insulation system of comprehensive analysis of networks _ Papers

Thesis network: Author: Jinhong Wen Qiang Wang Cuiyong Wang Gangmeng

Abstract outside the building thermal insulation system, not just focus on its energy efficiency, but also from the security, fire resistance, aging resistance and other comprehensive considerations, this building insulation for the current status and trends of integrated development.

Keywords building exterior insulation and energy-saving insulation comprehensive research
Foreword
Building energy efficiency as the country's mandatory to promote a long-term policies, and building insulation has become the most effective way to achieve energy saving building methods, after more than ten years of development, has made considerable progress, but also in the practical application there are some problems, insulation off a large area due to the occurrence of smashed cars, smashing things, assault, fire, etc. are not uncommon. and the country has a considerable amount of exterior insulation systems engineering at the same time the existence of these hidden dangers, seriously reducing the building thermal insulation system of life, so both energy-saving insulation systems, integrated security trends worth studying.

Second, the current outer insulation of the main problems
1. Construction Quality
The outer wall insulation works, due to on-site supervision, lack of supervision, for insulation works to bring a large number of quality problems: such as: the use of materials, while the inspection report, certificate, etc. eleven taste, but was detected Most of the construction side separately (using a special test done, as well as to meet the sampling, the first batch of material entering the pass, after the material sent to a non-qualified products, on-site construction is often used in the title non-standard products, the same, the scene pull-out test, in order to set aside a separate part of the construction team, construction and other normal surface is bound to vary. there is cutting corners on the amount of construction materials, particularly insulation bonding, surface mortar construction, insulation board bonded area is not enough, wipe the surface thickness of mortar is not enough, resulting in bond strength is not enough, the crack resistance is poor, so some projects less than one year or even six months to crack, fall off it is not surprising. one can not ensure the quality of the insulation works, but what about It's life.

(2) fire prevention
Currently, the exterior insulation and thermal insulation materials mainly for the organic material that once ignited, the so-called flame-retardant properties instantly disappear, not only does not prevent burning, but to help burn, especially high-rise residential and public places, in case of sudden fire difficult time fighting, a great security risk while polystyrene board, extruded sheet, polyurethane, etc., when burned, produce a large amount of smoke and dioxins and other toxic substances, serious air pollution and environmental .2008 Beijing Olympics table tennis, Shanghai 11.15 over the country due to large fires and fires caused by insulation had to make us think. for insulation materials, fire prevention, the state issued a "public consumption [2011] No. 65 Notice": demands from March 15, 2011, the building insulation using non-combustible materials.

3. Security system off a large area due to heat occurred smashed cars, smashing things, injured, or even killed one incident, it is not uncommon. The country has been completed and are being used EPS, XPS, SPU thin plaster external wall insulation system, a considerable number of projects exist hidden dangers.

4. Insulation life issues
New buildings are now located in the 70 years, and insulation design for 25 years, obviously this design itself is flawed. How to extend the life of insulation, and even to do with the life and architecture, has become an urgent need to solve human problems. Such a large scale in China grand building insulation projects, if not equal to the life of the building, a few years or in the near future, will produce large amounts of construction waste, the environmental disaster facing the greatest of these waste disposal that we could bear the gains heat energy than a higher price, will also need a very large reconstruction, maintenance costs.

5. Eco-environmental problems
Organic insulation materials for the petrochemical products, are non-eco-friendly products in its aging period under laboratory conditions is generally 25 years, in exceptional circumstances and under conditions of poor construction quality, shorten its life, once the outer insulation layer to its proper life has been abandoned, it will generate a lot of garbage. Insulation materials currently in the foam polystyrene board, extruded polystyrene board, spray urethane, polystyrene particles, auxiliary materials in the mortar, fiberglass mesh, steel mesh, expansion screws, etc., it is difficult recovery, virtually no how much re-use value. Links to free download http://www.hi138.com three different types of insulation materials, comprehensive performance analysis
Product environmental performance insulation fire safety performance of ecological functions of life
Polystyrene board insulation system is good to poor poor poor poor poor
Extruded insulation system of outside board poor poor poor poor poor excellent
Polystyrene insulation slurry good good good good good
Perlite insulation slurry excellent excellent excellent good
Closed-cell insulation perlite slurry excellent excellent excellent excellent
Hollow glass beads (ceramic thermal paste UU UU UU
Spray Polyurethane poor good good poor good excellent

Easy to see from the comparison table, the performance of inorganic insulation materials in fire has a comparative advantage, in line with public security and fire requirements proposed Class A fire, but the specific rate of inorganic insulation material energy can reach the number, whether 65%, ability to meet country's future higher energy efficiency goals? interior and exterior construction is done, or only the external walls, insulation layer thickness in different areas of how to determine? inorganic thermal insulation materials which are yet to be resolved.

Trends
With global energy conservation is increasing strongly, building energy conservation has become a consensus, which is holding the market provides a good opportunity for further development. According to the current condition of our country and abroad, building insulation status quo, the existing non-Class A (non-combustible type insulation materials, such as polystyrene board, extruded sheet, polyurethane, polystyrene insulation products such as pulp will not soon be eliminated, but with the continued technological innovation and Industry standards in building insulation and energy-efficient design of the project selection, will be more practical, functional, and rational, some of the high energy consumption, poor performance and short service life, products and systems will gradually be eliminated, energy efficiency, safety, fire, life must be comprehensive and long thermal insulation system of trends.



References
[1] <<exterior insulation engineering and technical specifications>>. Beijing: China Building Industry Press, 2005
[2] <<external wall insulation system standard fire rating of research>>. Beijing: China Building Materials Industry Press, 2008
[3] HUANG Zhen-li editor <<exterior insulation technology Hundred Questions>>. Beijing: China Building Industry Press, 2003
[4] <<building energy-saving construction quality inspection standards>>. Beijing: China Building Industry Press, 2007 Links to free download http://www.hi138.com