Construction technology Construction technology of composite insulation board for a high-rise residential exterior wall Feng Xiangdong, Fan Yongfa, Liang Jinxi (Shenzhen Construction Engineering Group Co., Ltd., Shenzhen 518048, Guangdong) for exterior insulation, and used as an external template for exterior walls. Combined with engineering practice, the process characteristics and construction process of the composite thermal insulation board were introduced. The results show that the external wall insulation system has good integrity, good thermal insulation and energy saving effect, and can effectively improve the construction progress and reduce the project cost.
1 Project Overview The 11th section of Jinshuiwan Jinshuiwan in Dongtai City is a high-rise commodity residential project located in the cold winter and hot summer area. The outer wall column and the concrete outer wall insulation are made of external wall composite insulation board. The external wall composite insulation board is made up of extruded polystyrene foam board as the main thermal insulation material and lightweight concrete. It is attached to the lightweight concrete board! The 4mm 100mm two-way anti-corrosion alkali-resistant steel wire mesh is a reinforcement layer. The external wall of the project adopts the external wall insulation system of the reinforced concrete external wall and the composite thermal insulation board external insulation. The thermal insulation board is installed outside the outer wall steel frame, and the template and the concrete are integrally poured. After the mold is removed, the insulation board and the exterior wall concrete are combined. In one, finally achieve the effect of energy saving and insulation on the external wall.
2 system process and characteristics 2.1 process flow composite insulation board layout design, processing, stacking - positioning line - external wall reinforcement ligature - placement of blocks and mortar support - composite insulation board installation - anchor composite insulation board - inside template installation ―Feng Feng Xiangdong, President of Shenzhen Construction Engineering Group Co., Ltd., 518048, 3rd Floor, Phase 2, Guodu Golf Garden, Xinsha Road, Futian District, Shenzhen, China Tel: (0755) 83589259 Side Wooden Grid Installation - Formwork Acceptance - Concrete Pouring - Formwork Demolition - Concrete Maintenance - Anchor Bolt Reinforcement - Wipe Anti-Cracking Mortar - Exterior Wall Finishing - Cleaning - Disassembly.
2.2 Process characteristics The composite thermal insulation board is professionally produced by the factory. The composite thermal insulation board and the outer wall composite thermal insulation board are installed before the structural concrete pouring, not only as the constituent material of the external thermal insulation of the outer wall, but also as the outer template of the outer wall. The composite thermal insulation board is formed by the simultaneous insulation of the thermal insulation board and the lightweight concrete (beam-column, shear wall) structure, and the composite board forms a solid composite thermal insulation board wall by horizontal lacing and anchor bolts and the concrete foundation wall, the wall body It does not change the structural form, realizes the integration of load-bearing, fireproof, flame-retardant and heat preservation. It has the characteristics of anti-seismic, durable, fire-proof, low cost and simultaneous construction with structure.
The external composite insulation board and the concrete exterior wall are bonded to each other.
The adhesion of the anti-corrosion and alkali-resistant steel mesh and the extruded polystyrene foam board in the outer light concrete is also fully adhesive, which is professionally produced by the factory and has strong bonding force.
External wall composite insulation board yin and yang angle distribution board 20 thick 1:3 cement mortar waterproof layer 064 hot-dip galvanized steel wire mesh layered plaster, layer thickness 矣! / 20 thick extruded polystyrene board protective layer in the block plastic concrete outer wall external wall section schematic. In the process of pouring concrete, the composite insulation board can withstand the concrete side pressure before solidification, the composite insulation board deformation meets the design requirements.
3 Construction preparation energy-saving external wall composite insulation board material must enter the construction site, the specifications, model and appearance quality of the composite insulation board must be checked, and the quality certification documents should be checked. After the materials enter the site, they should be sent to the inspection in a timely manner under the supervision witness. It can be used after passing the test (test).
When materials enter the construction site, when unloading and stacking, in order to avoid material damage, it is required that the stacking site should be leveled, preferably hard ground. The insulation boards of different specifications should be stacked and stacked, and should be placed vertically when stacked, and must be close to each other. Stacked in a flat position, the stacking height should not exceed 1.5m. When lifting, it should be placed vertically in a special steel cage to prevent rain, moisture and sun protection, and pay special attention to fire prevention.
4 Construction operation 4.1 Composite insulation board installation Fixed base layer treatment requirements When the composite insulation board is installed, the residual slurry on the base layer must be cleaned and cleaned, and installed from the bottom up according to the pre-bounced outer line.
The structural steel bars of the composite plate have been bundled, the concrete protective layer blocks and the stays have been installed in place, and the steel works are concealed and accepted.
The insulation board selected according to the location is installed in place.
According to the plate layout from bottom to top, from the positive angle to the negative angle, the composite insulation board is installed in place, and will be embedded in the composite insulation board during installation! 6 Horizontal lacing is hung on the structural steel bar, and the special plastic board is installed at the corner of the composite insulation board. The installation of the composite board should be horizontal and vertical, the width of the slab should be controlled within 2.5mm, the board surface should be flat, and the composite insulation board should be flat. After the installation is completed, install the inner and side formwork, and then use an electric drill to penetrate the wall bolt hole from the hole of the composite board to the inner side of the plywood, and then install the through-wall pull bolt and the plastic tube.
The installation of the composite insulation board for the outer wall at the anode and the corner is as shown.
In the construction process, the composite insulation board needs to cooperate with the formwork and the hydropower installation project. The insulation board shall not be damaged at will under any circumstances. If the template and water and electricity installation are required when installing the composite insulation board, it should be negotiated with the on-site management engineer.
4.2 After the concrete pouring formwork is installed, the surface flatness and verticality should meet the requirements of the specification, ensuring that the formwork is firmly installed and qualified by the supervision engineer.
Special personnel shall be responsible for the concrete pouring, and the technical delivery shall be carried out in a targeted manner according to the construction measures plan, and the whole process shall be followed up and inspected.
During the pouring process, the vibrating bar should be prevented from coming into contact with the thermal insulation board. Special personnel should be arranged to inspect the inspection, check the pouring condition and the change of the thermal insulation board. If there is any change, remedial measures should be taken in time. When concrete is poured into the shear wall, it is strictly layered and poured, and the layer is 30~50cm. The vibrator is inserted slowly and slowly. It is strictly prohibited to go to the top at one time, and the two sides of the hole are simultaneously poured to ensure the vertical of the hole to ensure the concrete vibrating and compact.
The cross-section of the external wall after the external wall composite insulation board is installed and the exterior wall is coated with waterproof mortar is as shown.
The 20 thick lightweight concrete composite panel is equipped with 4.3 composite thermal insulation board and structural anchoring to ensure sufficient adhesion between the composite thermal insulation board and the structural layer. Before the plastering on the wall surface, it must be drilled with impact drill on the thermal insulation board. ! 5mmX 80mm nylon expansion bolts, and fixed to the filled nylon bolts according to the regulations. Please have qualified units to carry out the pull-out test, and the single bolts are subjected to tensile stress. 0. 4.4 Insulation plate joints and detailed treatment of the joints after demoulding In a 20mm thick scraping layer, firstly apply a 12mm thick 1:2.5 cement mortar layer, completely dry, then add a galvanized welded wire mesh (!
15mm) full paving, first laying steel mesh and fixing with anchor bolts (6~8/m2), then rubbing 8mm thick cement waterproof mortar surface layer.
The split seam treatment cuts the 20mm thick lightweight concrete of the composite panel at each layer of the joint seam, and then fixes it in the cement waterproof mortar with a 5mm thick and 20mm wide plastic insert.
Door and window opening energy-saving construction measures The insulation method around the door and window hole is: 20mm thick ZL polystyrene particle insulation layer, and then wipe 20mm thick 1:2.5 cement waterproof layer.
Concrete structure beam, shear wall cold and heat bridge contact parts are designed with 20mm thick lightweight concrete (with 4mm 100mmX100mm galvanized mesh ribs) plus 20mm thick extruded polystyrene board for protection of cold and heat bridge.
The storage of thermal insulation sand slurry should be placed in a ventilated and dry place, sunscreen, moisture proof, and a mixing shed. All materials must be mechanically stirred in the mixing shed. The mixing shed should be selected in the back direction, and should be close to the vertical transportation machinery. The three sides are closed and the surface is used as the inlet and outlet. The material channel, the mixing shed should be covered, the ground should be flat and firm, away from the gravel field. The mixing ratio of MS light thermal insulation slurry should be volume ratio. It should be mechanically stirred and stirred for 5 min. Add fly ash or admixture and stir for 4 min. Mix the mortar with organic plasticizer for 3~5 min. 4.5 Quality Control The materials and components required for building energy-saving projects must meet the design requirements, and on-site sampling and re-inspection must be qualified.
The construction of energy-saving projects shall be carried out after the quality inspection of the grassroots is qualified.
Each process shall be quality controlled according to the construction technical standards. After each process is completed, inspection shall be carried out, and handover inspection records shall be carried out between the processes.
After the concealed project is completed, the construction unit shall notify the relevant units to conduct the acceptance and complete the acceptance record of the concealed project. The concealed project acceptance shall have detailed written records and necessary image data.
Before the construction of building energy-saving projects, the construction of the large-area process and construction practices shall be carried out on the site first, or the construction of the sample parts, and the construction may be carried out after confirmation by the relevant parties.
Building energy-saving projects shall be checked and accepted in accordance with the sub-projects.
When the amount of engineering energy-saving sub-projects is large, the sub-projects can be divided into several inspection batches for acceptance.
When the construction energy conservation project acceptance cannot be divided into sub-projects or inspection batches according to the above requirements, it may be divided by construction, supervision, construction and other parties. However, the acceptance project, acceptance content, acceptance criteria and acceptance records shall comply with the provisions of the Building Energy Quality Engineering Construction Quality Acceptance Regulation GB50411-2007.
5 Conclusion Composite insulation board is made up of 20mm thick lightweight concrete (with anti-corrosion and alkali-resistant steel mesh as reinforcement layer) and 20mm extruded polystyrene foam board. The composite board is professionally produced by the factory, and the bonding of the light concrete layer and the extruded board is fully viscous and firmly combined.
The composite thermal insulation board is used both as an exterior wall exterior formwork and as an exterior wall exterior insulation. The composite thermal insulation board and the structural concrete are integrally poured, so that the composite thermal insulation board and the structural concrete are better bonded.
Under the side pressure of the external wall and column concrete pouring, the deformation of the composite insulation board and the extruded board can meet the design requirements.
(Finish)
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