In general, in order to reduce the heat loss of the external wall and realize the heat preservation of the external wall, the energy conservation improvement in the construction will be carried out through the development of the external wall heat preservation technology and the use of energy-saving materials. The materials often used for thermal insulation in exterior walls are extruded board, extruded board, polystyrene particles, etc. the reason why this paper focuses on the thermal insulation technology of extruded board is that as an energy-saving material, extruded board has many advantages, such as wide application range, outstanding thermal insulation effect, improvement of indoor environment, expansion of indoor space, etc. This paper mainly introduces the application of extruded board in the construction of a construction project, and further explores the construction technology of extruded board insulation.
With the continuous development and progress of social economy, architecture is more and more seeking for external beauty, which needs complex exterior wall decoration to reflect, and the deepening of exterior wall decorative line coating is more and more essential. The deepened exterior wall drawings can greatly improve the convenience and accuracy of budget and construction. If you need to deepen, please scan the QR code below and contact the studio engineer wechat.
How to deepen / optimize the design of exterior wall thermal insulation coating project? The design process is here! Taobao platform announced
1 case project overview
A project belongs to the super large comprehensive commercial office building group, which is located in a comprehensive business district integrating clothing stores, supermarkets, entertainment facilities, etc. The total construction area of the project is about 721500 square meters, including 560000 square meters above the ground and 161500 square meters underground. The project is divided into three office buildings, which are composed of shopping center, business hotel, entertainment building, department store, office building, outdoor pedestrian street, residence and bottom business. Therefore, it is also required to match the thermal insulation materials and corresponding construction technology to reduce the energy consumption after the project is put into use. After many comparisons, in view of the strong thermal insulation, compression resistance, hydrophobic and moisture-proof characteristics of the extruded board, combined with its own light texture, convenient use and superior environmental protection performance, the extruded board was selected as the thermal insulation material of the project.
2. Construction principle of extruded board insulation
Extruded plate, known as adiabatic extruded polystyrene foam, is a thermoplastic material that works best in exterior insulation. The manufacturing process of extruded panels is complex and precise, and can be made into foam plates of different thickness to adapt to all kinds of construction environment by preening, curing, molding, drying and cutting raw materials. In terms of its performance characteristics, extruded board has excellent heat preservation and insulation, which is because the volume of air contained in it is over 98%, and the thermal conductivity of air itself is very small. Each cubic meter of extruded board is composed of millions of independent airtight bubbles, in which the air is closed without convection, so the heat preservation and insulation can be guaranteed. In addition, the construction principle of extruded board heat preservation It is to place the extruded board and other thermal insulation materials on the outside of the outer wall to create a continuous and layered cladding structure for the outer wall, so as to not only occupy the indoor space, but also play a significant role in the thermal insulation effect. The Extrusion board can effectively prevent the heat transfer, avoid the indoor heat to the outside in winter, and prevent the solar radiation heat from entering the room in summer, thus greatly reducing the waste of energy.
3 construction of extruded board insulation wall
3.1 construction process: base treatment → interface layer painting → interface agent painting of extruded board → paste extruded board → joint mending and leveling → installation of anchor → interface agent painting of extruded board → construction of protective layer → construction of facing layer
3.2 construction steps the installation and construction of extruded board in the project is the key to the construction of the whole exterior wall insulation system of the project, which is specifically divided into the following steps:
3.2.1 before the construction of external wall insulation, the base cleaning must ensure a clean and appropriate wall environment, and take corresponding measures to ensure the smooth construction. Thoroughly and comprehensively clean the wall to be constructed, including dust, oil dirt, powdered substances and other attachments that may hinder the pasting; at the same time, ensure that the wall is flat, fill the vacant parts and level the raised parts. In order to ensure that the extruded board can meet the requirements of the project construction of the super large comprehensive commercial office residence to the greatest extent, certain space shall be reserved according to the flatness of the wall, the design of the building facade and the technical requirements for the thermal insulation of the external wall to ensure that the horizontal and vertical control lines, expansion lines, decoration lines, etc. of the external doors and windows are popped on the wall. According to the flatness of the wall, hang the vertical reference steel line at the necessary part of the external wall. In order to control the perpendicularity and flatness of the extruded board, the horizontal line shall be hung at a suitable position of each floor.
3.2.2 the allocation of special adhesive is an important tool to ensure the close fit between the wall and the extruded board. According to the needs of different walls and extruded boards in office and residential buildings, it must be equipped with the necessary special adhesive. The adhesive must be prepared in strict accordance with the mixing proportion in the instructions, measured by a suitable meter, mechanically mixed, and supervised by a specially assigned person to ensure the mixing uniformity. The adhesive must wait for 5 minutes after mixing, and can be used after cooling. In order to ensure the freshness of the adhesive, it is not allowed to configure all the adhesives at one time, but should be mixed and used at the same time, and the service life of the mixed adhesive should not be more than 1 hour.
3.2.3 in order to prevent cracks in the wall, the pre glued turnover grid cloth must be used. All exposed parts of Extruded Boards, including expansion joints, door and window openings, shall be treated with grid cloth turnover. 70mm wide and 2mm thick polymer mortar shall be applied to the parts to be turned over. During the application process, one end of the mesh cloth 70mm shall be quickly pressed into the polymer bonded mortar with steel plaster until the overflowing polymer bonded mortar covers the five leakage of the mesh cloth. The remaining part shall be wrapped for standby use. The length of the thrown part shall not be less than 100mm around the end of the plate and the part exposed to the plate surface shall be pasted The grid cloth shall be protected by turning over or covering.
3.2.4 the standard sizes of 600mm × 900mm and 600mm × 1200mm are generally adopted when pasting extruded board for external wall insulation, but the real-time cutting can also be carried out according to the site needs, and the incision and layout must be vertical. When pasting, different pasting methods, such as point frame method and strip adhesion method, shall be selected according to the flatness of the base, but the bonding area shall not be less than 40%. When pasting, attention shall be paid to overlapping and pasting at internal and external corners. The corresponding shape shall be cut out by the whole Extrusion board at the door and window opening. The width of the small side shall not be more than 200 mm, and no straight seam shall appear at the four corners.
3.2.5 the installation of fixings and fixings is generally carried out 24 hours after the extrusion plate is pasted, and the length is generally the thickness of extrusion plate + 50mm. Holes shall be drilled from the surface to the interior with electric hammers, the width of which shall be determined by the fixture and the depth shall not be less than 60mm. When screwing in the fixings, make sure that the nail head and pressure plate are slightly lower than the plate surface.
3.2.6 after the plate surface is polished, leveled and installed, it is generally required to ensure that the plate surface is completely flat, and further inspection must be carried out. When grinding, it must be noted that the action should be light to avoid unavoidable mistakes due to excessive force, and at the same time, the circular motion should be used for grinding. Grinding and leveling refers to the area with uneven joint on the board surface. After the whole joint is polished to a very flat state, the material debris and floating ash shall be cleaned with a brush until the polished area is restored to a clean state, so as to ensure the overall state of the extruded board is good.
3.2.7 when preparing polymer mortar, the same precautions as the special adhesive shall be used, such as strictly following the preparation instructions, paying attention to the time arrangement, etc.
3.2.8 the application of polymer mortar is divided into two parts: the bottom layer and the surface layer. The bottom layer mortar shall be applied on the surface of the extruded board, and the accurate coating shall ensure the thickness of 2 ～ 2.5mm. After the wrapping grid cloth is pressed into the mortar, the reinforced grid cloth of the door and window opening shall be pressed into the mortar quickly. When pasting the grid cloth, the grid cloth must be tight. Use a trowel to press the grid cloth into the mortar surface from the middle to the surrounding, but not too deep, to ensure that the grid cloth is exposed to the bottom mortar. The specific requirements for grid cloth lapping are: the upper and lower lapping width is not less than 80mm, and the left and right lapping width is not less than 100mm. After the grid cloth is pasted, the upper layer of polymer mortar can be plastered to ensure that the thickness is between 0.5-1mm.
4. Precautions in the construction of extruded board insulation
(1) in order to ensure enough flatness and verticality for the installation of insulation board, it is necessary to make early preparations as much as possible, hang the control line and reference line to reduce the grinding workload.
(2) the gap shall be controlled below 2mm for the laying of insulation board. If it is larger than 2mm, the narrow strip of extruded board shall be used for filling, and glue shall not be applied between the board joints, and the height difference shall not be greater than 1.5mm.
(3) adjust the unevenness and similar phenomenon of the extruded board in time, and take the minimum adjustment measures.
(4) after the adhesive of the extruded board is applied, it must be completely dry, and it cannot be piled together without confirming that it is completely dry, thus affecting the use.
(5) ensure the integrity of the insulation board. All parts of the extruded board shall be arranged and connected closely to avoid cracking.
(6) classify and store the materials of extruded board, and ensure that the quality of extruded board meets the requirements and the maintenance time meets the standards at all times.
(7) during the mixing process of polymer mortar: the electric mixer shall be used to ensure even mixing, without the appearance of powder or caking; the mortar shall be controlled by adding water to ensure the viscosity between 100 and 110; the mortar shall be placed for five minutes after mixing, so as to effectively play its active ingredients; special personnel shall be employed for operation and professional technical training and quality training.
Detailed design cases of the studio:
Construction organization design of integrated construction scheme for external wall thermal insulation and decoration
Deepening design of EPS line drawing for exterior wall insulation of a project in Shanxi -- deepening design of EPS line coating drawing for exterior wall insulation of building engineering
Detailed design of EPS line drawing for external wall insulation of a project in Luoyang
Beijing project external wall insulation, EPS line deepening construction drawing design case
Detailed design of EPS line drawing for exterior wall decoration of a project in Tianjin
Detailed design of EPS line drawing for exterior wall of a community project in Hebei Province
Exterior wall insulation lecture: analysis of material properties and construction technology of various exterior wall insulation systems
Design case of facade (real stone paint joint) effect drawing of a high-rise residential project in Hubei Province
How to deepen / optimize the design of exterior wall thermal insulation coating project? The design process is here! Taobao platform announced
Disclaimer: some articles are reprinted on the Internet, only for sharing and not for any commercial purpose. The copyright belongs to the original author. If the original author and source of some articles and pictures cannot be confirmed due to numerous reprints, only the reprint source shall be indicated. If you have any questions, please add wechat: xiaomaolipidian, we will delete it immediately and apologize, thank you!
More recommended insulation decoration of the external wall construction process analysis -- building engineering external wall insulation EPS line coating drawings in-depth design external wall insulation coating engineering how to deepen / optimize the design? The design process is here! Taobao platform announces the research progress of water in water imitation granite colorful paint -- Construction Engineering exterior wall thermal insulation EPS line coating drawing deepening design exterior wall thermal insulation decoration integrated construction plan construction organization design new energy saving material effect on building exterior wall thermal insulation (foam glass / rock wool board / inorganic insulation / foam ceramic / /) -- building exterior wall thermal insulation EPS line