â–¡ In the wall structure of the Master Liu Wei. The paper focuses on the characteristics, application scope, process principle, process flow, operation points, quality control and other construction elements of this type of wall, and analyzes its economic and social benefits. The article can be promoted as a guiding process for the construction of the core insulation composite wall.
Operational points; quality control In recent years, with the development of the economy, China is gradually restricting the production and use of solid clay bricks, accelerating the innovation of wall materials, and actively developing new wall materials for energy conservation, heat preservation and heat insulation. As a new type of wall, sandwich insulation composite wall has gradually applied and promoted a series of advantages such as novel wall structure, energy saving and heat preservation, beautiful appearance and corrosion resistance. At the same time, as a new type of wall, there is no relatively uniform construction operation process. Through the experience and practices summarized in the actual construction process, we have concluded the construction process of the sandwich thermal insulation composite wall.
1Features 1.1 is a new type of wall with advanced structure. It is a new type of wall structure actively promoted by the state, which is conducive to energy saving and consumption reduction. 1.2 The exterior of the wall is decorated with colored decorative blocks. It is novel and beautiful, with high strength, no falling off and resistance. Weathering, not only protects the middle sandwich insulation layer, but also has a good decorative effect; overcomes the common quality problems of cracking and falling off of the exterior wall finish layer, and prolongs the use period of the building; 1.3 insulation layer is located inside and outside The sandwich layer on both sides of the wall is a new insulation system. The quality of the cold (heat) bridge is avoided, and the heat preservation effect is good.
2 The scope of application is applicable to the wall construction of high-rise villas, houses, office buildings and other public and civil buildings in the middle or lower floors.
3 Process principle Concrete block sandwich insulation exterior wall, consisting of structural layer, insulation layer and protective layer. The structural layer adopts 190mm main block; the insulation layer generally adopts 50mm polystyrene board; the protective layer adopts 90-thick decorative detachment block masonry.
The structural layer, the thermal insulation layer and the protective layer are placed with the tensile steel mesh or the tensile steel bar to make the three layers firmly combined. The entire load of the external wall is carried by the 190 thick structural layer on the inner side of the outer wall. At each layer of the ring beam, the mm high pick is supported to support the outer protective layer. The out-of-plane forces of the outer protective layer, including wind and seismic action, are transferred from the tensile gusset to the structural layer.
4 Process flow and operation points Concrete block structure layer masonry (600mm high per step) - Polystyrene board insulation layer paste structure layer placement (600mm high per step) - Decorative concrete block masonry protective layer masonry (600mm per step) High) - rust-proof steel mesh placement - step by step masonry - finished product protection.
Apparent density thermal conductivity water absorption index tensile a degree curing (kg/m3) (w / (mk)) (%) (V / V) (%) (Mpa) natural curing 60 ° steam curing 18-20ss0.041 Raspberry 630> 4.2 Operation points The building should use the main specifications 390mmx 190mmx190mm block, the strength level should not be lower than MU10. Blocks less than 28d in age should not be masonry. The block should be placed on the wall with the bottom facing upwards, and the holes should be staggered. The length of the lap joint is 90mm. The fullness of the horizontal gray seam is 90%; the fullness of the vertical ash seam is >80%; no quilting or transparency can occur. Seam. The intersection of the corner of the wall and the intersection of the vertical and horizontal walls shall be built at the same time. Masonry is built according to the leather rod pull line.
The length of the horizontal gray joint laying mortar during masonry shall not exceed 80mm, and the vertical gray joint shall be mortared at the same time and at the end of the two 60mm wide end faces of the block to be masonry, and then the squeezing method shall be used. The block is in place. Under normal temperature conditions, the masonry height of the block should be controlled within 1.8m.
4.2.2 Polystyrene board insulation layer Adhesive layer placement (600mm per step) The thickness of polystyrene board should be in accordance with the construction drawing design requirements. The size of the standard board is 1200nunx600mm and 900mmx600mm. The polystyrene board is placed close to the inner structural layer, height and masonry The height of the blocks is the same, that is, 600nun. The adjacent two polystyrene boards should be cut into 45° angles and slanted with a wallpaper knife to include the yin and yang angles.
4.23 Decorative detachment from the masonry protective layer masonry (600mm per step 1) Firstly, the test and calculation should be carried out on the large sample map, and then the masonry should be carried out after determining the modulus. Before the masonry, the model should be first made and checked by the relevant departments. It can be constructed in a large area. There should be no non-whole bricks. The single-sided hanging line should be masonry. When laying, the upper line should be followed by the lower heel, and the vertical joint should be straight. The mortar on the extruded wall should be scraped off in time to maintain the outer protection. The layer is clean and avoids contamination.
3) b4 galvanized steel mesh is connected between the structural layer and the protective layer masonry. One layer is placed for each three-skin concrete block. The steel mesh should be set along the wall length. When the hole is encountered, it can be cut off at the hole.
According to the above sequence, the structural layer, the protective layer and the decorative protective layer are laid, and the height of each step is 600mm. After the masonry, the steel mesh is laid in time, and then the brickwork is continued in steps.
After the finished product is finished, the mortar should be prevented from being frozen or exposed to the sun in the early stage, and the outer side of the decorative concrete should be affected. After each layer of the masonry is completed, it should be cleaned in time and taken care of to prevent human damage and pollution.
5 material 190mmx190mm, there are two square holes, the minimum outer wall thickness should be 30mm, the minimum rib thickness should be > 25mm, the hollow rate should be 25%. The quality of concrete block should meet the following requirements: concrete block size tolerance table 1 project superior Product grade 1 qualified product length width height concrete block compression capacity table 2 strength grade block compressive strength (Mpa) 5 block average body block minimum polystyrene foam board thickness should meet local insulation requirements It is generally 50mm thick. The material properties shall comply with the performance indexes of "molding polystyrene board vinyl foam for thermal insulation" (GB/T10801.0-2002): main performance indicators of polystyrene board. Table 3 The decorative strength of the block shall be in accordance with the design. Requirements, size tolerance, appearance quality should use superior products, the main performance technical indicators should meet the following requirements: decorative 劈 ç Œ ç Œ ä¸»è¦ ä¸»è¦ ä¸»è¦ ç Œ ç Œ ç Œ 4 4 4 4 4 4 4 4 é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹ é’¢ç‹After the anti-rust treatment (hot dip galvanizing method 450g / ff m2) can make t ten books == F = f items permissible deviation (mm) inspection method axis position offset 10 with theodolite and ruler inspection with other measurements仪善检奎垂 each layer 5 with 2m support line inspection 2 straight full raspberry 10m10 with instrument, hanging line and ruler inspection degree 10 > 10m20 or with other instruments 6 machine equipment 6.1 pull mixing and transport equipment 250L mortar mixer: mortar Stir; direct transport; lose.
6.2 masonry tools, shovel, ash tray, masonry shovel, ruler, corner turner, cutting machine, etc.
6.3 Other Tools Wallpaper Knife: Cut polystyrene board.
7 Labor organization and safety 7.2.1 Construction workers should use construction machinery correctly to prevent personal injury accidents; 7.2.2 Concrete blocks and decorative concrete blocks should not be randomly thrown to prevent injury; 7.2.3 Construction workers Safety protection should be done well, and it is not allowed to operate in violation of regulations. It should be civilized and safely constructed to prevent pedals from being emptied and to prevent falling from high altitude.
Impermeability and relative water content. If the strength level does not meet the design requirements and the age is less than 28 days, it is not allowed to be built on the wall.
8.2 Concrete block masonry quality control The concrete block masonry axis and verticality allow for 1 Table 5 8.3 Decorative 劈 ç Œ ç Œ ç Œ è´¨é‡ 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 The thickness of the ash seam is lmm. 8.3.2 The block should be free from skew, no missing corners and cracks; 8.3.3 The appearance of the block should be clean and the color should be consistent.
In short, the sandwich insulation composite wall as a new type of wall saves the national land resources: the use of new wall materials saves resources for the country, saving 578 clay solid bricks per cubic meter of wall, producing solids per mu of cultivated land. 606,000 bricks and 0.62 tons of coal per 10,000 standard bricks can save 9.54 acres of arable land and save 358.36 tons of coal.
In the case of housing use, under the premise of the same comfortable conditions, the new wall structure saves a lot of living expenses for residents by saving energy for heating and saving coal for heating and air conditioning in summer. Moreover, the construction period, labor and cost of the exterior wall decoration are reduced, which is conducive to ensuring the construction period. At the same time, the long-term maintenance cost of the external wall surface is reduced, and the economic and social benefits are good. d Jinan City Construction Engineering Quality Supervision Station 8 Quality Control 8.1 Material Quality Control Concrete Blocks and Decorative Concrete Blocks should be inspected according to the current national standards, and the quality of the products should be strictly controlled.
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