Key points of construction:
1, construction conditions
(1) The foundation wall shall meet the requirements of Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-2002) and Code for Acceptance of Construction Quality of Masonry Engineering (GB50203-2002).
(2) The design and installation of various incoming pipelines, downspout brackets and embedded pipe fittings on the door window frame and wall are completed, and the thickness of external insulation layer is reserved.
(3) The ambient temperature during construction shall not be lower than 5℃. C, the wind is not greater than 5, the wind speed should not be greater than 10m/s, and rainproof measures should be taken during construction in rainy season.
2, construction machinery preparation
(1) Before thermal insulation construction, a mortar mixer with a volume of about 300L shall be installed according to the quantity of works and the number of workers entering the site, and a mixer shed shall be built according to the construction layout, and the water and electricity shall be connected, and the debugging is normal. The location of the mixing shed should be downwind and close to the vertical transportation machinery. Mixing should be 2-closed, and one side is the discharge channel. There should be a ceiling and the ground should be flat and solid.
(2) When double-row scaffolding is used in thermal insulation construction, the scaffolding shall be firmly erected and tightly spread in layers; The use of electric hanging basket construction, should install electric hanging basket, and the safety acceptance before use. Supporting vertical transportation machinery should be used after installation and acceptance.
(3) Iron trowel: A giant trowel with large trowel area should be used in the construction of thermal insulation slurry.
(4) External angle trowel and internal angle trowel: plastic materials should be used for thermal insulation slurry construction, and steel should be used for anti-crack mortar.
(5) ash supporting plate
(6) Lever: the length of aluminum alloy lever is 2-2.5M,1.5m.
(7) Footing rule: the width of wooden footrest is 3-5㎝, and the 2M-long side is a splayed footrest.
(8) bristle brush: 2 inches
(9) Square shovel
(10) mixing barrel: an open mixing barrel with a volume of about 20L.
(1 1) handcart
(12) Wooden square ruler: the length of one side is not more than 15M.
(13) Common detection tools: theodolite and setting-out tool, 2M line support plate/ruler, square ruler, probe, steel ruler, etc.
3, material preparation
Preparation of (1) interface mortar;
Put the interfacial agent and water in a horizontal mixer according to the ratio of 3: 1 and mix evenly. When the mortar is used up within 4 hours, the ground ash can be recycled and re-stirred, but the mortar should be strictly used overnight.
(2) Preparation of rubber powder polystyrene particle thermal insulation slurry:
Use a mortar mixer with a capacity greater than 300L, or a mixer that meets the requirement that the mortar volume in the mixer does not exceed 70% of the mixer volume. First, add 22-30㎏ water into the mixer (the amount of water added depends on the construction workability), then pour in a bag of (25㎏) rubber powder, stir for 5 minutes, then pour in a bag of (200L) polystyrene rubber powder lightweight aggregate, and continue to stir evenly (3 minutes). The slurry should be used under stirring and used up within 4 hours.
(3) Preparation of anti-crack mortar:
Pour the anti-crack mortar and water into the mortar according to the ratio of 1: 0.25, and stir evenly for several minutes. Mixed mortar shall not be added with water at will, and shall be used up within 2h.
4, construction procedures
Construction procedure of rubber powder polystyrene particle external wall insulation system. See Figure 3-45.
Figure 3-45 Construction Scheme of Exterior Wall Insulation System with Rubber Powder and Polystyrene Particles
5 Key points of construction operation
(1) Basic wall treatment (preparation before insulation construction)
Before thermal insulation construction, the structural acceptance shall be confirmed in conjunction with relevant departments. The verticality and smoothness of the external wall base should meet the requirements of the current national construction acceptance specifications. Before the insulation layer is concealed, the following inspection shall be conducted to confirm that the allowable deviation of the flatness and verticality of the wall meets the acceptance criteria.
1) The external walls, such as balcony railings, rainwater pipe supports and external fire exits, have been installed and accepted. Buried pipes, boxes, embedded parts and air conditioning holes on the wall should be installed and accepted in advance, and the influence of insulation layer thickness should be considered.
2) The external window paving frame is installed and accepted.
3) Exterior wall scaffold holes, formwork through-wall holes and wall defects are repaired with cement mortar and accepted.
4) The deformation joints and expansion joints of the main structure should be handled in advance. Hot-dipped steel wire mesh and 1: 3 cement mortar are used to prevent cracks between concrete objects and walls of frame structures, and the thickness is 10㎜.
5) Thoroughly remove floating ash, oil stain, isolation agent, hollowing and weathering products on the surface of the wall at the grass-roots level that affect the wall construction. When the wall protrusion is not less than 10㎜, it should be removed.
(2) Before the construction of cake insulation slurry, hang vertical lines and elastic control lines, and mark the construction thickness on the wall. Cake should be pasted according to the following steps:
1) For each layer, check the flatness of the wall surface with 2m ruler, and check the verticality of the wall surface with 2m support plate.
2) At the place about 10㎝ from the top of each floor, and at the same time at the place about 10㎝ from the yin and yang angle of the big wall, paste 5㎝×5㎝ polystyrene board according to the thickness of the vertical steel control line that has been hung in the big corner, and paste cakes with interface mortar as the standard.
3) After the antique label is pasted, pull the horizontal control line between the horizontal paste cakes. Specifically, a small round nail with small thread is inserted into the standard paste cake, and the small thread is straightened to make the control of the small thread slightly higher than that of the standard paste cake 1㎜, and several standard paste cakes are horizontally stuck between two paste cakes at the interval of1.5m..
4) Hang a vertical line with iron wire, and paste a label and cake at a position about 10㎝ from the bottom of the floor and about 10㎝ from the angle of yin and yang of the wall (when the floor is high, two people will do it together), and then paste a label and cake along the vertical direction at an interval of about 1 ㎝.
5) After the completion of each layer of paste cake construction, check the consistency of paste cake with 2 ~ 5m small guy wire in the horizontal direction, and check the verticality with 2m wire support plate in the vertical direction, measure the thickness of ash cake, make records and calculate the number of extra-thick areas.
(3) Insulation layer construction
1) The base wall of various materials shall be brushed with roller and full interface mortar, and the interface mortar shall not be too thick.
Insulation construction should be carried out before the interface mortar dries and hardens.
2) Thermal insulation mortar shall be completed by layers, and the plastering thickness shall be controlled at about 20㎜ each time. The plastering construction shall meet the design insulation layer thickness, and the interval between each layer shall be 24h.
3) The bottom plastering sequence of thermal insulation slurry should be from top to bottom and from left to right. On the basis of compaction, increase the thickness of construction plastering as much as possible until it is about 1㎝ away from the thermal insulation standard.
4) The middle plastering thickness of thermal insulation slurry should reach the level of standard paste cake. After the middle layer is plastered, it should be rubbed back and forth on the wall with a big bar to remove the high and make up the low. Finally, use an iron trowel to press it again, so that the surface of the thermal insulation slurry layer is flat and the thickness is consistent with the standard paste cake.
5) The plastering of thermal insulation slurry surface should be carried out after 4 ~ 6h of middle plastering. Before construction, use a ruler to check the flatness of the wall, and the deviation of the wall should be controlled within 2 ㎜. When plastering the thermal insulation surface, repair should be given priority to. For depressions, use dilute cement slurry for leveling. For the protruding part, you can smooth it with a trowel. Finally, the wall should be leveled with a trowel, and the level should be detected with 2㎜ feet first, and then the verticality should be detected with a pallet, so that the verticality can reach the acceptance standard.
6) During the construction of thermal insulation slurry, attention should be paid to cleaning the ground slurry, and it can be used after being re-stirred within 4h.
7) Find the angle of Yin and Yang according to the following steps:
(1) Check the right angle of the corner at the grass-roots level with a wooden ruler, and check the verticality of the corner vertically with a wire pendant.
(2) After the middle insulation slurry is plastered, wipe it on the insulation layer at the corner with a wooden ruler, so that the insulation slurry at the corner is basically vertical, and then calender it with a trowel of yin and yang angles.
(3) The plastering repair operation of thermal insulation mortar surface layer shall be repeatedly measured with a ruler and a trowel to ensure that the verticality is 2 ㎜ and the right angle is 2 ㎜.
(4) The joint between the wall of the door and window side opening and the door and window frame should set aside corresponding insulation thickness, and protect the finished products on the surface of the door and window frame.
⑤ The insulation and plastering of doors and windows must be carried out after the installation and acceptance of doors and windows. During the construction of doors and windows, the thermal insulation layer of the side hole of doors and windows and the upper opening of windows should be plastered first, and then the thermal insulation layer of the big wall should be plastered. The window sill part should be affixed with the thermal insulation layer of the big wall first, and then with the thermal insulation layer of the window sill. Before construction, the single-sided eight-character guiding rule should be cut out according to the size of doors and windows, and the mouth should be pasted on the guiding rule to ensure that the dimensions of Founder and doors and windows are consistent.
8) After the construction of thermal insulation slurry is completed, use wallpaper knife to cut out the eaves gutter of doors and windows with a set width along the thermal insulation layer, and the groove depth is about 15㎜. First, fill the gutter with anti-crack mortar, and then embed the gutter into the pre-cut groove, which should be firmly bonded with the anti-crack mortar. The eaves on both sides of the gutter should be removed, and the gutter should be embedded and placed horizontally. When the drip tank is constructed, the embedding position of the main tank should be no more than 2㎝ from the wall of the window side hole and no more than 3㎝ from the external thermal insulation wall.
9) After the construction of thermal insulation slurry is completed, a comprehensive quality inspection shall be conducted according to the requirements of the inspection lot. On the basis of qualified self-inspection, arrange the construction quality records and report them to the general contractor and relevant parties for hidden inspection and acceptance.
(4) Construction of anti-crack protective layer and facing layer:
1) coating finish. After the insulation layer construction is completed for 3 ~ 7h (the strength reaches the judgment standard of palm pressing wall) and the insulation layer thickness and flatness are concealed and accepted, the anti-crack layer construction can be carried out.
(1) Before the construction of crack-resistant layer, the alkali-resistant plastic-coated glass fiber grid cloth should be cut in sections according to the height of the layer, the grid cloth should be cut into a length of about 3m, and the edge of the grid cloth should be cut off.
(2) Prepare the mixing anti-crack mortar according to the requirements of the construction ratio. Pay attention to the fact that the mortar should be used together with the mixing mortar, and it is forbidden to use expired mortar. When sand is used on site, it must pass a 2.5 ㎜ sieve, otherwise the crack-resistant mortar layer is too rough, which will affect the engineering quality.
(3) When plastering anti-crack mortar, the thickness should be controlled in 3 ~ 5 ㎜. Immediately after plastering the anti-crack mortar with the width and length equivalent to the area of the grid cloth, press the alkali-resistant plastic glass fiber grid cloth 0 into the newly plastered anti-crack mortar with an iron trowel. The lap width between mesh fabrics should not be less than 50㎜. First, press the lap joint of the bottom grid cloth into the anti-crack mortar, and then put some anti-crack mortar on it. The lap joint should be filled with anti-crack mortar. It is strictly forbidden to dry the lap joint of grid cloth without coating anti-crack mortar or if it is not satisfied with coating anti-crack mortar. Finally, press it again along the longitudinal direction of the grid cloth with an iron trowel to collect light and eliminate trowel marks on the surface. The degree to which the grid cloth is pressed in is to see the exposed mesh, but it is appropriate to see the exposed grid cloth.
(4) The alkali-resistant grid cloth in the internal corner should be overlapped by single-side pressure rubbing, and its width should be less than150 ㎜; In the Yang corner, double bread should be used to press and rub the lap joint, and its width should be less than 200㎜. During the construction of grid cloth, it can be laid horizontally or vertically according to the shelf conditions, but attention should be paid to the downstream lap joint, and it is strictly forbidden to lap against the current.
⑤ The grid cloth shall be laid close to the wall to ensure smoothness and no wrinkles, and the mortar fullness shall reach 100%, without large-area exposed cloth, and it shall be leveled and straightened in a large area. At the corner of Yin and Yang, the founder and verticality should be guaranteed.
6. The first floor of the wall should be paved with double-layer alkali-resistant grid cloth, and the first floor should be paved with grid cloth, and the grid cloth should be laid by butt joint (cloth lap). After the first layer is laid, the second layer should be laid with grid cloth. As mentioned above, the anti-crack mortar between the two layers of grid cloth should be full, and dry sticking is strictly prohibited.
Figure 3-46 schematic diagram of adding grid cloth to doors and windows.
⑦ Special metal corner protectors should be set between the external thermal insulation double-layer grid cloth on the first floor of the building.
⑧ Before laying large area grid cloth, it should be pasted at the entrance of doors and windows along the direction of 45 Χ angle. The appropriate size of the grid cloth is 3002㎜×400㎜, and the paste position is shown in Figure 3-46.
Pet-name ruby anti-crack surface button corner need to be smoothed and polished, but before the calendering operation, you can use a bristle brush to take an appropriate amount of water to brush on the new anti-crack mortar surface, which can effectively prevent the anti-crack mortar from being smoothed. After flattening, the windowsill should be straightened with a trowel, without a brush, and the window Yang angle should be leveled and polished with a trowel.
Attending crack prevention layer after the completion of the construction, should be in accordance with the requirements of the inspection lot to conduct a comprehensive inspection of the engineering quality, inspection method and insulation layer flatness and verticality inspection method is the same. On the basis of qualified self-inspection, arrange the construction quality records and report them to the general contractor and relevant parties for hidden inspection and acceptance.
1 1 After the anti-crack mortar is plastered, it is forbidden to daub the main line of ordinary cement mortar, loop line or scrape rigid putty and other external decoration materials that can not meet the flexibility index.
12 anti-crack mortar is applied with elastic primer 2 days after construction, and a waterproof and breathable layer is formed on its surface.
13 after the anti-crack mortar base is dried and the thermal insulation anti-crack layer is qualified, the finishing layer can be constructed. For the parts whose flatness can't meet the decoration requirements, flexible waterproof putty should be scraped to make up for it, including uneven wall surface, internal angle, external angle, ribbon and parts that need leveling. During leveling construction, the wall surface and evaluation parts should be checked with a ruler. For local unevenness, flexible waterproof putty should be scraped first to repair it. Grind the flexible waterproof putty No.0 coarse sandpaper grinding plate for grinding. Large-area brushing putty should be carried out after local repair, and large-area brushing putty should be carried out twice, but the two brushing directions should be leveled with each other.
14 relief coating can be directly sprayed on the elastic primer, and other coatings can be brushed or sprayed after the putty layer is dried. A number of hanging stones shall be hung directly on the insulation layer according to the design requirements.
2) Brick and metallic paint finish. After the insulation layer construction is completed for 3 ~ 7d (the strength reaches the judgment standard of palm pressing wall) and the insulation layer thickness and flatness are concealed and accepted, the anti-crack construction can be carried out.
(1) Before the construction of anti-crack layer, use wire cutters to cut the hot-dip galvanized four-corner welding net according to the floor height, and cut the hot-dip galvanized four-corner welding net into small pieces with a length of about 3m, and level the small pieces as much as possible.
(2) When plastering anti-crack mortar for the first time, the thickness should be controlled at about 3㎜, and plastering is required to be full, and there can be no slurry leakage. Construction should be carried out by floors. After the first layer of anti-crack mortar is cured, the construction of hot-dip galvanized four-corner welded mesh should be started, and the flatness of the first layer of anti-crack mortar should not be lower than that of the thermal insulation slurry layer.
(3) Nail laying of hot dip galvanized four-corner welding net should be carried out from top to bottom. Construction should be carried out from left to right in turn. Firstly, the hot-dip galvanized four-corner welding net is put in place on the wall. After the hot dip galvanized four-corner welding net is opened, it should be bent to the wall. Bend about 5-6 ㎝ long steel wire 12 into a U shape and put it on the wall. Hot dip galvanized four-corner welding net should be temporarily fixed. After the hot-dip galvanized four-corner welding net is fixed on the thermal insulation wall, immediately drill a hole in the upper part of the temporarily fixed hot-dip galvanized four-corner welding net with an electric impact drill. In the light-filled block wall, the anchor nail should be driven into the mortar joint of the block as much as possible. The concrete method is to mark the width of the block on both sides of the constructional column of the construction wall before nailing the expansion bolt, and then pull the horizontal line to drive the expansion bolt into the horizontal control line to ensure the tensile strength of Zhang Ding.
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Figure 3-47 Distribution of Anchorage Points of Paste Brick
(4) In the construction of nail-mounted hot-dip galvanized four-corner welding net, try to make the hot-dip galvanized four-corner welding net close to the wall. For the part with local inclination of the hot-dip galvanized four-corner welding net, insert the U-shaped 12 steel wire into the insulating layer for flattening and fixing, and the local inclination of the hot-dip galvanized four-corner welding net should be less than 2㎜. The lap width of the four corners of the hot-dip galvanized welding net is about 40㎜ (3 squares), and the lap parts are bound together with galvanized steel wires, and the spacing is not more than 300㎜.
⑤ In order to ensure the construction quality of the corner of doors and windows and the corner of wall, the hot-dip galvanized four-corner welding net at the corner of doors and windows and the corner of wall can be folded into a right angle before construction, and then anchored.
⑥ The number of fixed expansion bolts at the side openings such as windows and holes, and at the closing position of hot-dip galvanized four-corner welding net should not be less than 3 per linear meter. The edges of the hot-dip galvanized four-corner welded mesh at doors and windows shall be directly fixed on the wall base, and shall be anchored close to the paving frame. The distance between the anchored expansion nail and the outside of the wall at the base shall not be less than 30mm.
⑦ In the process of cutting the hot-dip galvanized four-corner welded mesh, the steel mesh shall not be folded. Check that the nails of hot-dip galvanized four-corner welding net should be close to the wall surface to ensure the flatness reaches the requirement of 2 ㎜.
⑦ The coating construction of the second layer of anti-crack mortar can be carried out only after the flatness of the four-corner welded mesh of hot dip galvanizing is qualified. The plastering thickness of the second layer of anti-crack mortar should be controlled within 5 ~ 7 ㎜. Hot dip galvanized four-corner welding net requires that 10% be covered with anti-crack mortar, and the flatness and verticality of the anti-crack mortar surface should be controlled within 2 ㎜.
Pet-name ruby anti-crack mortar plastering 2 ~ 3 hours later, you can use a trowel to wipe the surface of anti-crack mortar on the grid at the four corners of hot dip galvanizing, providing the corresponding interface for the connection of the next layer.
Attending the crack-resistant mortar squabble needs to be scraped and trimmed, but the surface can be brushed and then calendered, which can effectively prevent the mortar from sticking to the trowel during calendering. The windowsill mouth should be straight, and there should be no brush. The external angle of the window should be flattened and straightened with an external angle trowel.
1 1 After the construction of anti-crack mortar is completed, the construction quality shall be comprehensively checked according to the requirements of the inspection lot. On the basis of qualified self-inspection,
Organize construction quality records to ensure that the general contractor and relevant parties conduct hidden inspection and acceptance.
12 After plastering with anti-crack mortar, it is forbidden to smear ordinary cement mortar waistline and cement mortar cuffs on the surface.
13 sticking tile shall be carried out according to the general construction technology of sticking tile, and mortar shall be stuck with special brick for insulation layer.
A, elastic line framing: after the crack-resistant mortar base is qualified, elastic lines can be framed according to the requirements of drawings, and standard control bricks are pasted on the surface to control the wall size, verticality and surface smoothness. Pay attention to the control line of each facade to pop up at one time. The angle of Yin and Yang, doors and windows, column center and column angle of each construction unit should be elastic, and the control line should be elastic with ink lines. Only after the acceptance, the team can carry out local square thin line construction.
B, brick arrangement: according to the brick arrangement diagram, wall size, tile size, horizontal and vertical brick arrangement, and pay attention to ensure the uniform joint of tile, the whole brick should be arranged on the big wall and pass through the column. Multiple rows of incomplete bricks are not allowed on the same wall. Non-integral bricks should appear in inconspicuous places such as internal corners and window walls. Brick joint width should not be less than 5㎜, it is forbidden to use close joint to arrange bricks.
C. Brick soaking: Bricks with water absorption greater than 0.5% should be soaked for 24 hours and dried before use; Bricks with water absorption less than 0.5% can be used directly without soaking bricks.
D. Bricklaying: Bricklaying is generally carried out from top to bottom, and large-area iron monopoly of high-rise buildings is carried out in sections, and each section of bricklaying construction should be carried out from top to bottom. According to the control line of the big wall, paste control tiles at the corner of the control line. After plastering the control tile, check the horizontal and vertical lines, and then pull the detailed control line for construction after it is qualified. Before tiling, the wall should be fully sloped, and the construction can be started when the layer is dry and wet and there is no obvious water accumulation. Paste, plaster on the back, bonding mortar edge slightly lower. Gently knead when bonding, and remove the mortar with a shovel. The thickness of bonding mortar should be controlled at about 3 ~ 5 ㎜, and the verticality and flatness of ceramic tiles should be consistent with the control surface.
E. Brick jointing: Before construction, it shall be carried out after the previous brick construction has passed the inspection. Joints should be adapted to horizontal joints, and then to vertical joints. The joint depth is 2 ~ 3 ㎜, the gap is straight, the outline is square and the color is consistent. Immediately after jointing, clean it with cotton silk, sponge water or detergent. For ceramic tiles rich enough, it is forbidden to clean the wall with acidic substances such as hydrochloric acid, so as not to cause the jointing materials to turn white. After the ceramic tile is pasted, it should be pointed in time, and it is strictly forbidden not to tick off the seam during the winter when the ceramic tile is bonded near winter construction.
project name
Contact person of construction unit
telephone
Contact person of construction unit
telephone
Contact person of supervision unit
telephone
Xxxxxxxxxxxxxxxxxx co., ltd
Date: Year Month Day