Introduction of rock wool insulation board for external wall
External wall rock wool insulation board is a special rock wool board for external wall insulation, which belongs to Class A incombustible fireproof insulation material. It has the advantages of high compressive and tensile strength, low water absorption and hygroscopicity, good dimensional stability, no thermal expansion and contraction, aging resistance and so on. It can be compatible with the external wall system, providing effective heat insulation, energy saving, fire prevention and extreme weather protection for buildings.
The external wall rock wool insulation board is specially designed and produced for the thin plastering system of building external wall insulation, and is suitable for the external wall insulation or energy-saving transformation of new or existing buildings with dense structures such as concrete or brick walls. Among them, the rock wool belt for external wall insulation can also be used as a fire isolation belt, which can be used in conjunction with thermal insulation materials with combustion performance not up to Grade A, so as to improve the fire protection function of building external walls.
Construction technology of rock wool insulation board for external wall;
First, the construction preparation
1. The wall at the grass-roots level shall meet the requirements of Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-2002), Code for Acceptance of Construction Quality of Masonry Engineering (GB50203—2002) and the corresponding code for acceptance of wall at the grass-roots level. Before thermal insulation construction, the structural acceptance shall be confirmed in conjunction with relevant departments. If the deviation of the wall at the grass-roots level is too large, mortar should be used for leveling.
2. Install control steel vertical lines in all corners of the house. In high-rise buildings and super-high-rise buildings, check the steel vertical line with theodolite.
3. The influence of the thickness of insulation system should be considered when installing balcony railings, rainwater pipe supports and external fire exits of external walls.
4. Install the auxiliary frame of the outer window.
5. Scaffolding holes, through-wall holes and wall defects on the wall should be trimmed with corresponding materials.
6, concrete beam or wall reinforcement head and protrusions removed.
7. The deformation joints of the main structure should be handled in advance.
8. According to the requirements of engineering quantity, construction site and time limit for a project, the sample shall be turned over first, and the fixed consumption shall be determined through the sample turning over. The material consumption shall be determined through consultation between Party A, Party B and the material supplier, and the person in charge shall be familiar with the drawings before insulation construction.
9. Organize the construction team to conduct technical training and disclosure, and conduct safety education.
10, material preparation should appoint someone who's in charge, mix proportion, mixer and operation should meet the requirements, in strict accordance with the manufacturer's instructions, it is forbidden to use expired mortar and mortar.
1 1. Prepare mixing station and warehouse for stacking materials as required. The construction of mixing station needs to choose downwind direction, close to vertical transportation machinery. The mixing shed needs to be closed on three sides, and one side is used as a feeding and discharging channel. Bulk tanks can be used where conditions permit. Requirements for warehouse construction: Waterproof, moistureproof and protection from direct sunlight. Materials should be piled up overhead from the ground.
12, the construction temperature should be greater than 5℃, and the wind power should not be greater than Grade 4. Construction is not allowed in rainy days, and protective measures should be taken.
Second, the basic interface processing
Should clean the wall, remove oil, remove floating ash, etc. Loose and weathered parts of the wall should be removed. When the protrusion on the wall is larger than lOmm, it should be removed.
When plugging feet, hands, eyes and abandoned holes, the impurities and dust in the holes should be cleaned, watered and wetted, and then filled with 1: 3 cement mortar.
Three, hanging vertical, elastic control line
According to the method of determining the setting-out of building height, high-rise buildings and super-high-rise buildings can use the big corner of the wall, the sides of doors and windows, and use theodolite to make a straight line to find the vertical. Multi-storey buildings or medium-high-rise buildings can be hoisted vertically from the top floor with large wires, and low-carbon steel wires can be stretched to find rules. The horizontal line can be controlled by drawing a circle according to the floor elevation or the 500mm upward line of 32_+0.000. According to the vertical line and insulation thickness, control lines should be placed on both sides of the big corner at each step, and then the horizontal line should be pulled as a sign block.
Fourth, install rock wool board.
1. Determine the positioning line of rock wool board, lay rock wool board, drill holes at the installation position of anchor bolts according to the construction drawing, and tap nylon sleeve with a disc to compact the rock wool board. There are at least 3 anchors per square meter on the wall and at least 2 anchors on each rock wool board. Anchors shall be arranged according to the drawings.
2, around the window, each side should be set at least three anchors.
3. Bend the pre-cut regular steel wire mesh into a "U" shape and an "L" shape, while laying the rock wool board, wrap the bottom of the wall with a "U" mesh, and wrap the side walls of doors and windows and the corner of the wall with an "L" mesh. Knock the screw into the nylon sleeve to fix the steel wire mesh.
4. Bend the steel fabric with right-angle edge strips.
5. Rock wool boards must be butted and squeezed together without gaps. The width of the narrow rock wool board used for inlaying shall not be less than 150mm, and at least one anchor bolt shall pass through it to make the rock wool board close to the wall.
6. After laying the rock wool board, lay the steel wire mesh from bottom to top. When the single hole of steel wire mesh is overlapped, it should be bound with low carbon steel wire or fixed with anchor bolts. When binding, there shall be at least 4 places per meter, and the opposite sides shall be connected with low-carbon steel wires when overlapping, and the spacing shall not be greater than150 mm. When the anchor bolts are fixed, the spacing shall not be greater than 600 mm.
7. Repair all joints, and flatten the protruding part of the steel mesh with clips.
8. After the insulation layer is installed and passed the inspection, the interface layer can be constructed.
Construction of verb (Verb's abbreviation) Interface Layer
1. Put the plastic gasket under the steel mesh, and pad it with a 5 mm thick steel mesh .. Set 4 plastic gaskets per square meter, arranged in a plum blossom shape.
2. Spray the prepared interface mortar evenly on the surface of rock wool board and steel wire mesh with a special spray gun.
Six, leveling layer construction
1, making ash cake and screed
At a distance of about 100mm from the top surface of the floor, about 100mm from the bottom surface of the floor, and about 100mm from the internal angle or external angle of the big wall, vertical ash cakes are made according to the vertical control line (when the floor is higher, they should be completed by two people together) as reference ash cakes, and then the ash cakes with the thickness of the wall leveling layer are made according to the line between two vertical reference ash cakes, and the spacing between each ash cake is1. After the vertical ash cake is fixed, pull the horizontal control line between two horizontal ash cakes. The specific method is to insert a small round nail with small thread into the ash cake, straighten the small thread, so that the control of the small thread is slightly higher than that of the ash cake 1mm, and paste some ash cakes or screed horizontally every 1.5m between two ash cakes.
After each layer of ash cake paste construction is completed, check the consistency of ash cake with 5m string in the horizontal direction, and check the verticality with 2m support plate in the vertical direction, and measure the thickness of ash cake. The thickness of screed should be consistent with the thickness of ash cake. Check the consistency of leveling layer thickness with 5m string and record it.
2. Leveling of rubber powder polystyrene particle thermal insulation slurry
(1) When plastering polystyrene particle thermal insulation slurry, the flatness deviation should not be greater than 4 mm, and the plastering thickness is slightly higher than the ash cake thickness.
(2) Thermal insulation slurry shall be plastered from top to bottom and from left to right. After plastering the whole wall, wipe it back and forth on the wall with a ruler to remove the high and make up the low. Finally, press it again with an iron trowel to make the surface smooth and the thickness consistent.
(3) The concave part of the insulation surface shall be leveled with dilute cement slurry, and the convex part shall be leveled with trowel. After plastering the thermal insulation surface for 30 minutes, it shall be plastered with a trowel, first horizontally and then vertically, and the acceptance standard shall be reached after inspection with a supporting ruler.
(4) During the construction of thermal insulation slurry, attention should be paid to cleaning up the ground ash, which should be used in a small amount in time and stirred for many times.
3, Yin and Yang Angle leveling must be carried out according to the following steps.
(1) Check the right angle of the corner at the grass-roots level with wood square, and check the verticality of the corner vertically with wire pendant.
(2) After plastering, the thermal insulation slurry should be pressed with wood square, and the slurry layer at the corner should be rubbed up and down to make the thermal insulation slurry at the corner basically vertical. Then press the angle of yin and yang with a trowel.
(3) When plastering large-angle thermal insulation slurry, use a square ruler and a trowel to repeatedly measure plastering repair operation, and ensure that the verticality is +_2mm and the right angle is +_ 2mm.
(4) The thickness of insulation layer should be reserved at the joint of door window frame and wall, and the surface of door window frame should be protected.
(5) The heat preservation and plastering construction of window parts must be carried out after the installation and acceptance of auxiliary window frames. During the construction of doors and windows, plastering should be carried out for the side openings of doors and windows first, and then plastering should be carried out for the windowsill and the upper opening of the window. 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.
Seven, wipe the anti-crack mortar
After the leveling layer construction is completed for 3 ~ 7d days and the insulation layer construction quality is qualified, the anti-crack layer construction can be carried out. The length of alkali-resistant grid cloth is not more than 3m, the size is cut in advance, and the edge of the grid cloth should be cut off. When plastering the anti-crack mortar, the thickness should be controlled at 3 ~ 4 mm After plastering the anti-crack mortar with the width and length equivalent to the grid cloth, immediately press the alkali-resistant grid cloth from left to right and from top to bottom with an iron trowel. In the place such as humanly scaled mouth should be along the 45. Add a grid cloth (400mm×300mm) in advance. The lap width of alkali-resistant grid cloth should not be less than 50mm, and dry lap is strictly prohibited. The alkali-resistant grid cloth in the internal corner should be overlapped by stubble pressing, and the width should be 50 mm or more; Yang Angle should also be stubble lap, its width is more than ≥200mm or more. Alkali-resistant grid cloth should be laid flat and wrinkle-free, and the fullness of mortar should reach 100%. At the same time, it should be leveled and straightened, and the founder and verticality at the angle of Yin and Yang should be maintained.
The lower part of the first floor wall should be laid with double-layer alkali-resistant grid cloth, and the first floor should be laid with grid cloth. Mesh cloth should be butted with mesh cloth. It is forbidden to dock the grid cloth at the angle of Yin and Yang, and the docking position is not less than 200mm away from the angle of Yin and Yang. Then lay the second layer of grid cloth as above. The anti-crack mortar between the two layers of grid cloth should be full, and dry adhesion is strictly prohibited.
Special metal corner protectors should be set between the external insulation of the lower part of the first floor of the building, and the height of corner protectors is generally 2 m. After the first layer of grid cloth is laid, put away the metal corner protector, press out the anti-crack mortar at the corner protector hole with a trowel, and wrap the corner protector with the second layer of anti-crack mortar. Make sure that the protection angle is firmly installed.
After the anti-crack mortar is plastered, it is forbidden to plaster the waist line and collar line of ordinary cement mortar. On this surface, it is forbidden to scrape rigid putty and other inflexible materials.
Eight, brushing elastic primer.
After the construction of crack-resistant layer is completed for 2 hours, elastic primer can be applied evenly, and there can be no bottom leakage.
Nine, scraping flexible waterproof putty
Big wall putty with 400 ~ 600 mm long scraper, small parts such as doors and windows spat with 200mm long scraper. The first time, repair local potholes, the second time, full scraping, and the third time, when the water-resistant putty is in a semi-dry state, the bedding face shall be bound with a wood square board with a length of 400-600mm-, the 0: 0 sand board shall be polished with sandpaper, and the corners of doors and windows shall be polished with short sand boards with a length of 0 sandpaper. The fourth time requires full scraping. When the waterproof putty is semi-dry for the fifth time, the bedding face is bound with a long wooden square board with a length of 400 ~ 600 mm, and then bound and polished with zero sandpaper. Doors and windows corners are bound and polished with zero sandpaper and short sandpaper. If the flatness can't meet the requirements, the putty scraping and polishing procedures should be added again until the flatness requirements are met.
Ten, besmear brushs primer
Brush tool adopts high quality short hair roller. Do a good job of framing before priming, and frame the wall with separating paper, instead of framing and sewing. Fill in a box for each painting to avoid obvious contact marks of the primer. Brush the primer evenly once or twice and dry it completely 12h. After the primer is completely dried, roll the top coat with a forming roller to make it close to the wall, dip it evenly, and survive at one time according to the painting direction and requirements.