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The application of Liao Weicheng, an inorganic non-combustible external wall thermal insulation material, was compared with the commonly used insulation systems in the market. The shortages and hidden dangers of the existing organic wall insulation systems were pointed out, and it was important to promote the building external wall thermal insulation energy-saving technology. effect.
With the development of social economy, the world's available energy sources are increasingly depleted, the atmospheric environment is gradually deteriorating, and various extreme weather conditions have occurred around the world. Humans have begun to notice that it is imperative to save energy and protect the environment. The external insulation materials currently use organic-inorganic composite materials more. This paper mainly introduces the advantages of pure inorganic materials and organic-inorganic composite materials by introducing the application of pure inorganic non-combustible external wall insulation materials in external wall insulation system engineering.
1 The composition of the inorganic non-flammable insulation system 14 The insulation layer consists of dozens of natural ore extracts as the main materials, which are processed, dried, and vacuum-decomposed, together with the inorganic non-flammable insulation material made of a mixture of the stone lipid mucous membrane agent and water. Its thermal conductivity is about 0.055, between benzene plate "0.041) and powdered polystyrene particles (0.060); heat storage coefficient (23) is greater than benzene plate (0.93) and powdered polystyrene particles (1.05) - more than , Excellent insulation (East, Central, South China, hot summer and cold winter due to too long sunshine time, so the heat storage coefficient of the energy-saving material is high and low, become indicators of energy-saving advantages and disadvantages) interface layer and protective layer) active ion penetration Crystalline waterproof inorganic binder, is a variety of mineral extraction extracts. The system ensures the energy-saving and heat-insulating performance indicators, and at the same time strengthens the bond strength between layers to ensure the combination of the system and the wall, and cleverly uses the active ions of the system's inorganic minerals and the porous structure of the concrete to use water molecules as carriers. , Infiltrated into the voids of concrete aggregates, and multiple catalytic gelation reaction with free radicals (calcium, salt, potassium, alkali, magnesium, etc.) in concrete to form water-insoluble dendrite-like hydration crystallizations, which blocked the Water molecules in any direction. Pure mineral active ions have multiple activation characteristics in contact with water. If concrete cracks occur, water molecules penetrate again, pure ions are activated, new water crystals are formed, water molecules are blocked, and permanent waterproof and moisture-proof effects are achieved. The wall crack prevention, impermeability, energy saving, and heat preservation functions reinforce the compressive, impact, and tensile bond strengths of the insulation system so that it can be safely attached to the wall without the need of a net. Concrete life. These two characteristics are a significant sign of excellence over other exterior insulation systems.
2 The simplicity of the construction method of the inorganic non-flammable insulation system The construction of the interface layer. After the basic wall surface meets the requirements of the construction acceptance standard, the water is cleaned at the same time. The AICA waterproof adhesive material, special mucomucosal agent and water in 25:1: (15 ~ 25) and mix evenly after the application and retain the rough surface (Note: the interface layer can also be used cement mortar) insulation layer construction. Apply LINS, a special mucolipid mucous membrane and water in a ratio of 25:1:(25~30), mix thoroughly, and apply a rough surface. The thickness of the first layer should be controlled below 20mm. After the surface is semi-dried, the second layer can be applied. The thickness is subject to the design requirements.
Protective surface construction. AICA waterproof adhesive used in the interface layer, after the semi-drying of the surface of the insulation layer (press with fingers, no dents) began to smear, such as the facing layer of brick, stone, to replace AICA waterproof adhesive Binder construction at the same time can reduce overall costs.
Table 1 Comparison between inorganic non-flammable insulation system and common insulation system Name of system Comparison item Inorganic non-combustible system EPS system (organic and inorganic composite material) XPS system (organic and inorganic composite material) Polyphenylene granules Heat insulation paste (organic and inorganic composite material) Insulation performance Heat conduction The coefficient 1 (1) has a short construction period and a low overall cost. 11) The product is an inorganic material composed of natural minerals. It is non-toxic, non-volatile, and non-polluting. It is an environmentally friendly green building material. In September of all materials, the application of the XPS thin plastering exterior insulation system in Shanxi Province Wang Jiangbo's external wall insulation system construction process and operating points to promote the development of XPS external insulation system. : XPS thin-plaster external insulation system, energy-saving, construction process At present, the Central Ministry of Construction requires buildings to achieve more than 50% of heating energy. XPS (Extruded Polystyrene) thin plaster external wall insulation system is commonly used in exterior wall thermal insulation systems. It is a lightweight, high-efficiency and environment-friendly wall energy-saving system. The process is simple and reasonable.
1Features 1) High-efficiency and energy-saving; 2) Heat bridges are eliminated; 3) External insulation increases living area; 4) Structural cracks caused by temperature difference are avoided, and effective insulation of the wall is achieved to extend the life of the building; Comfort, no hindrance to interior decoration, and easy maintenance; 6) The XPS insulation layer of this system is compact in structure and high in compressive strength, which helps to improve the system's ability to resist impact and resist various external forces; it has high tensile strength and can be improved. Resistance to negative pressure: A's ability; high shear strength, can withstand greater surface gravity, and is conducive to the paste of the outside of the tile;) This system uses a flexible adhesive with anti-crack effect and wiping adhesive, with high elasticity And overall, it has strong adaptability to the wall cracks of buildings, especially for the old wall local cracks; 8) The system adopts the interfaces of the door and window openings and other parts and the interface between the system and non-insulated parts. Reinforcement treatment of grid cloth and anchor bolts increases the strength of the system, and can effectively prevent cracking and shedding of the surface layer; this system is vulnerable to door and window openings and the like. Pouring a portion, the intermediate armor layer is provided with a special flexible waterproof coating layer, to prevent rainwater from entering the insulation layer and the wall portions affect system performance and quality of the surface layer.
2 Scope of application The insulation system is widely applicable to all types of high-rise (multi-layer) civil and industrial buildings external walls can be recycled and reused, does not cause secondary pollution.
4 Comparison with commonly used insulation systems in the market and comparison of commonly used insulation systems in the market are shown in Table 15: Insufficient and hidden fire prevention problems of existing organic wall insulation systems (XPSEPS powdered polystyrene particles). Polystyrene thermal insulation material fires inside and outside the house. The flame burns inward and outward from the window opening, which affects the polystyrene insulation layer around the window. The polystyrene insulation material will dissolve, split, and disappear when the temperature reaches 60*c~100*C. In the absence of strict protective isolation measures, the fire will spread in the outer insulation layer, will burn the entire insulation layer, and produce toxic gases; if the exterior wall is tiled, stone, the entire building exterior decoration materials will fall, so that Caused serious disaster accidents. Similar disasters have occurred repeatedly.
Insulation resistance to wind problems. The existing EPS and XPS systems are mostly constructed by the sticking method. Due to the huge wind suction effect of the high-rise building's leeward, the thermal insulation panel is often caused to fall.
The problem of service life Most of the insulation systems now use machine adhesives. The service life of most organic adhesives is generally 5 years to 10 years. In addition, the core insulation materials of the existing insulation systems: polystyrene plates and polystyrene extruded plates. , Polystyrene particles slurry, polyurethane foam, etc. are all organic materials, its material's weatherability and anti-aging properties determine the service life is generally 5 to 10 years. The difference in the service life between the two is likely to cause quality problems in the overall insulation performance of the insulation layer and even the building.
Insulation layer internal condensation problem. As the indoor water vapor in winter penetrates through the wall and gradually enters the interior of the external wall, it will cause condensation inside the insulation layer. This accelerates the aging or debonding of organic binders, and can not be ignored in some buildings with high indoor humidity. Once the insulation inside the insulation layer dew, it will greatly reduce the effect of insulation performance, and even the insulation layer as a whole off .
Construction complex and insulation system cold and hot bridge problems. Due to the shape of the material itself, it is difficult to meet the exterior decoration needs of the current building diversity, and there are many joints and joints, and it is easy to form a cold and thermal bridge phenomenon, so it is difficult to ensure the overall effect of wall insulation.
6 Analysis of the Benefits of Inorganic Non-flammable Thermal Insulation System 1) No need for any regulation;) Insulation; 3) Long service life; 4) Reduced part cost and space saving.
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