Xi'an renovation classroom cement mortar ground leveling construction process, process and acceptance standards
1. The standard procedures for ground leveling are: grassroots processing → finding elevations, bombing lines → watering wet → plastering plasters and ribs → mixing mortars → brushing cement paste layers → laying cement mortar surfaces → wood trowels boring → iron The trowel press the first pass → second pass calendering → third pass calendering → curing
2, first sweep away the dust on the grassroots level, brush with a wire brush and tweezers, remove the mortar skin and ash layer, with 10% of the fire alkali solution brush off the oil on the grassroots, and use the water in time to flush the lye net.
3. According to the +1000mm horizontal line on the wall, measure the elevation of the surface down and play it on the wall.
4. Use a watering can to evenly spray the ground floor.
5. Determine the thickness of the surface layer (not less than 20mm) according to the horizontal line of the surface layer of the wall around the room, then pull the horizontal line to start the plastering (5cm*5cm), horizontal and vertical spacing of 1.5-2.0 meters, gray The plane above the cake is the ground surface elevation. If the room is large, you must also apply markings. The mix ratio of the mortar material used for plastering the plaster cake and the standard ribs is the same as that of the mortar used to polish the floor.
6. Stir the mortar and stir it with a mixer. The color is the same.
7, before the laying of cement mortar, brushing a layer of cement slurry, do not brush the area is too large, with the brush with the surface layer of mortar.
8. After the cement mortar is applied, spread the cement mortar and spread the mortar between the ash cakes.
9. After the wooden scraper is flattened, use a wooden trowel to flatten it and check its flatness with a 2-meter ruler at any time.
10. After the wooden trowel is flattened, it is pressed with iron trowel for the first time until it is discharged. After the initial setting of the surface mortar, it was pressed with iron trowel for the second time and the surface was pressed flat and pressed. The third pass of calendering before the final setting of the cement mortar must be completed before the final setting.
11. 24 hours after completion of ground calendering, sawdust or other materials covered with sprinkler water conservation, keep moist, curing time is not less than 7 days, when the compressive strength reaches 5Mpa.
Acceptance Criteria:
1. Cement mortar surface layer and base layer should be firmly bonded and should not be hollowed out.
2. The surface of the cement mortar surface shall be densely calendered. No cracks, peeling, dusting, or unqualified defects shall be allowed.
3, the ground is not flooded, should be done according to the design requirements of flooding, there should be no inverted flooding phenomenon.
4. Check the surface flatness with a 2m ruler and allow a deviation of 4mm.
Attachment: 1, empty wood flooring method:
Empty solid wood flooring is the basic method of solid wood flooring installation. After installation, the flooring is comfortable and has a long service life. Floors should be installed first on the empty floor and then on the wooden floor.
(1) Installation method of keel:
Embeddings should be made on the ground to fix the wooden keel. The embedded parts are bolts and lead wire. The distance between the embedded parts is 800 mm and they are drilled from the ground. After the embedded parts are completed, the base ground shall be treated with moisture-proof treatment and a hot asphalt or waterproof material shall be applied. After the wooden keel is treated with hot asphalt, it is placed in the position of the embedded part and firmly tied with lead wire. In order to ensure that the top of the keel is flush, grooves should be made at the binding sites to allow the lead wires to fall into the plane. Use a long ruler to level the top surface. If it is not flat, you can adjust the plane by adding anti-corrosion treatment under the keel. After leveling the top surface, tighten with bolts. The bolt caps should fall into the top surface of the keel. Therefore, the bolts should be machined before installation. In order to ensure the firmness of the keel, the application of the card is interrupted horizontally at intervals of 800 mm.
After the wooden keel is installed, a layer of insulation and sound insulation material shall be added at the gap of the wooden keel. The height of the mat shall be lower than the height of the top surface of the keel to make it have a certain gap with the surface layer. The sound insulation material may be slag, foam plastic Wait until the insulation and insulation materials are completely dry before installing the floor.
(2) Installation method of wood floor The empty wood floor should have a base panel and the base panel should use a large core board. The base core board is fastened with nails on the wooden keel. The joint must be on the keel. 2mm gap is left at the seam. The screw cap should be punched into the board surface 2mm, and the surface of the core board is leveled and the surface is cleaned. After the installation of the control line.
Paving wood floors should start from the doorway. The length of the board facing the direction of light into the room, when the nails are used, a round nail with 2.5 thicker than the wood board is used, and the floor board is inclined and nailed into the big core board. The nail cap is flattened and punched into the board. Inside, it is better to use nailing. In order to ensure that the slats are tight and straight, nails can be nailed near the slats and the slats can be tightly closed with the module.
After the floor is finished, the surface is first planed with a plane, then sanded with No. 0 sandpaper, then the skirting board is installed, the floor is pressed firmly, and then the putty is put on. Putty putter should first scrape the skirting board, and then scrape the floor, first inside and outside, the putty should be shaved twice. After the putty is dry, use a No. 1 wooden sandpaper to clean the floor surface, clean the floor surface, apply the floor paint, and polish the wax.
2. Solid Wood Flooring Method The solid wood floor is laid on the base floor of the building directly. Because the actual floor is less occupied, the construction is simple, and the construction period is short. It is suitable for low-rise buildings.
Practically-laid wood floors require a relatively high level of processing at the grass-roots level. First, moisture-proof treatment should be performed at the grass-roots level. Generally, linoleum is used, and other waterproof paints can also be used to brush the surface. Above the moisture-proof layer, use fine-grained concrete to level the surface and scrape it with 107 cement slurry to make the ground flat within 2 mm. After curing, scrape the floor and wait until the floor is completely dry and the moisture content is below 7%.
Before cleaning the wooden floor, the grassroots floor should be cleaned to ensure that the grass-roots level is flat, solid, clean, free of grease or dirt, and after the thorough cleaning, the control line is covered.
Paving wood flooring should pay attention to glue with the paste, such as the use of neoprene adhesive, should be on the back of the wood floor and the ground floor at the same time brushing, such as with emulsion adhesive, only on the grass on the brush. The plastic surface should be evenly brushed, brushed, and then glued to the wooden floor, squeezing the adjacent floor hard to make it tight and evenly spaced, and then gently hit the board with a small hammer to bond it firmly to the base.
The post-processing method of solid wood flooring is the same as that of empty solid wood flooring.
1. The standard procedures for ground leveling are: grassroots processing → finding elevations, bombing lines → watering wet → plastering plasters and ribs → mixing mortars → brushing cement paste layers → laying cement mortar surfaces → wood trowels boring → iron The trowel press the first pass → second pass calendering → third pass calendering → curing
2, first sweep away the dust on the grassroots level, brush with a wire brush and tweezers, remove the mortar skin and ash layer, with 10% of the fire alkali solution brush off the oil on the grassroots, and use the water in time to flush the lye net.
3. According to the +1000mm horizontal line on the wall, measure the elevation of the surface down and play it on the wall.
4. Use a watering can to evenly spray the ground floor.
5. Determine the thickness of the surface layer (not less than 20mm) according to the horizontal line of the surface layer of the wall around the room, then pull the horizontal line to start the plastering (5cm*5cm), horizontal and vertical spacing of 1.5-2.0 meters, gray The plane above the cake is the ground surface elevation. If the room is large, you must also apply markings. The mix ratio of the mortar material used for plastering the plaster cake and the standard ribs is the same as that of the mortar used to polish the floor.
6. Stir the mortar and stir it with a mixer. The color is the same.
7, before the laying of cement mortar, brushing a layer of cement slurry, do not brush the area is too large, with the brush with the surface layer of mortar.
8. After the cement mortar is applied, spread the cement mortar and spread the mortar between the ash cakes.
9. After the wooden scraper is flattened, use a wooden trowel to flatten it and check its flatness with a 2-meter ruler at any time.
10. After the wooden trowel is flattened, it is pressed with iron trowel for the first time until it is discharged. After the initial setting of the surface mortar, it was pressed with iron trowel for the second time and the surface was pressed flat and pressed. The third pass of calendering before the final setting of the cement mortar must be completed before the final setting.
11. 24 hours after completion of ground calendering, sawdust or other materials covered with sprinkler water conservation, keep moist, curing time is not less than 7 days, when the compressive strength reaches 5Mpa.
Acceptance Criteria:
1. Cement mortar surface layer and base layer should be firmly bonded and should not be hollowed out.
2. The surface of the cement mortar surface shall be densely calendered. No cracks, peeling, dusting, or unqualified defects shall be allowed.
3, the ground is not flooded, should be done according to the design requirements of flooding, there should be no inverted flooding phenomenon.
4. Check the surface flatness with a 2m ruler and allow a deviation of 4mm.
Attachment: 1, empty wood flooring method:
Empty solid wood flooring is the basic method of solid wood flooring installation. After installation, the flooring is comfortable and has a long service life. Floors should be installed first on the empty floor and then on the wooden floor.
(1) Installation method of keel:
Embeddings should be made on the ground to fix the wooden keel. The embedded parts are bolts and lead wire. The distance between the embedded parts is 800 mm and they are drilled from the ground. After the embedded parts are completed, the base ground shall be treated with moisture-proof treatment and a hot asphalt or waterproof material shall be applied. After the wooden keel is treated with hot asphalt, it is placed in the position of the embedded part and firmly tied with lead wire. In order to ensure that the top of the keel is flush, grooves should be made at the binding sites to allow the lead wires to fall into the plane. Use a long ruler to level the top surface. If it is not flat, you can adjust the plane by adding anti-corrosion treatment under the keel. After leveling the top surface, tighten with bolts. The bolt caps should fall into the top surface of the keel. Therefore, the bolts should be machined before installation. In order to ensure the firmness of the keel, the application of the card is interrupted horizontally at intervals of 800 mm.
After the wooden keel is installed, a layer of insulation and sound insulation material shall be added at the gap of the wooden keel. The height of the mat shall be lower than the height of the top surface of the keel to make it have a certain gap with the surface layer. The sound insulation material may be slag, foam plastic Wait until the insulation and insulation materials are completely dry before installing the floor.
(2) Installation method of wood floor The empty wood floor should have a base panel and the base panel should use a large core board. The base core board is fastened with nails on the wooden keel. The joint must be on the keel. 2mm gap is left at the seam. The screw cap should be punched into the board surface 2mm, and the surface of the core board is leveled and the surface is cleaned. After the installation of the control line.
Paving wood floors should start from the doorway. The length of the board facing the direction of light into the room, when the nails are used, a round nail with 2.5 thicker than the wood board is used, and the floor board is inclined and nailed into the big core board. The nail cap is flattened and punched into the board. Inside, it is better to use nailing. In order to ensure that the slats are tight and straight, nails can be nailed near the slats and the slats can be tightly closed with the module.
After the floor is finished, the surface is first planed with a plane, then sanded with No. 0 sandpaper, then the skirting board is installed, the floor is pressed firmly, and then the putty is put on. Putty putter should first scrape the skirting board, and then scrape the floor, first inside and outside, the putty should be shaved twice. After the putty is dry, use a No. 1 wooden sandpaper to clean the floor surface, clean the floor surface, apply the floor paint, and polish the wax.
2. Solid Wood Flooring Method The solid wood floor is laid on the base floor of the building directly. Because the actual floor is less occupied, the construction is simple, and the construction period is short. It is suitable for low-rise buildings.
Practically-laid wood floors require a relatively high level of processing at the grass-roots level. First, moisture-proof treatment should be performed at the grass-roots level. Generally, linoleum is used, and other waterproof paints can also be used to brush the surface. Above the moisture-proof layer, use fine-grained concrete to level the surface and scrape it with 107 cement slurry to make the ground flat within 2 mm. After curing, scrape the floor and wait until the floor is completely dry and the moisture content is below 7%.
Before cleaning the wooden floor, the grassroots floor should be cleaned to ensure that the grass-roots level is flat, solid, clean, free of grease or dirt, and after the thorough cleaning, the control line is covered.
Paving wood flooring should pay attention to glue with the paste, such as the use of neoprene adhesive, should be on the back of the wood floor and the ground floor at the same time brushing, such as with emulsion adhesive, only on the grass on the brush. The plastic surface should be evenly brushed, brushed, and then glued to the wooden floor, squeezing the adjacent floor hard to make it tight and evenly spaced, and then gently hit the board with a small hammer to bond it firmly to the base.
The post-processing method of solid wood flooring is the same as that of empty solid wood flooring.
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