CN112575979A - Construction method of plastering waterproof mortar for building exterior wall - Google Patents
Construction method of plastering waterproof mortar for building exterior wall Download PDFInfo
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- CN112575979A CN112575979A CN202011434443.3A CN202011434443A CN112575979A CN 112575979 A CN112575979 A CN 112575979A CN 202011434443 A CN202011434443 A CN 202011434443A CN 112575979 A CN112575979 A CN 112575979A
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- mortar
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- waterproof
- wall
- leveling
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
Abstract
The invention discloses a construction method of plastering waterproof mortar for an exterior wall of a building, and relates to the technical field of construction of constructional engineering. The method comprises 6 construction steps of base layer treatment, vertical sleeve square alignment, rib calibration, waterproof and leveling layer mortar laying, waterproof mortar maintenance and outer wall decorative coating construction. The conventional polymer mortar waterproof layer with the thickness of 7mm is improved to a polymer mortar waterproof layer with the thickness of 25mm, the waterproof effect is greatly improved, the anti-cracking capability of the concrete is doubled by adding anti-cracking fibers, and the generation and development of concrete cracks are reduced; meanwhile, the waterproof layer and the leveling layer are combined into one, so that the construction structure level is reduced, the construction steps are simplified, the construction efficiency is greatly improved, the construction period is shortened, and the overall cost of main body construction is reduced.
Description
Technical Field
The invention discloses a construction method of plastering waterproof mortar for an exterior wall of a building, and relates to the technical field of construction of constructional engineering.
Background
At present, the impermeability of the outer wall is an important problem which needs to be solved urgently in the construction of the prior art. With the wide application of various novel wall materials (such as concrete hollow blocks, aerated concrete blocks, ceramsite concrete hollow blocks, clay hollow bricks and the like), solid clay bricks which are used in large quantities in the past are forbidden to be used obviously. The application of the novel wall material can achieve the purpose of recycling materials, and the purpose of reducing damage to the natural environment is achieved, but the novel wall material generally has the defects of large porosity, strong water absorption, poor impermeability and the like, the construction process is not perfect, the phenomenon of water leakage easily occurs on the outer wall, in addition, the existing high-rise buildings are many, rainwater in winter and rainy seasons often continuously flows down on the outer wall for a few days, the air pressure of the outer wall in winter is very large, the permeability resistance requirement on the outer wall is higher, and therefore effective measures for preventing the leakage of the outer wall of the building must be taken while the novel wall material is used.
Disclosure of Invention
In order to solve the problems, the invention discloses a construction method of plastering waterproof mortar for an external wall of a building, which combines leveling and a waterproof layer into a whole, reduces the structural level and plays a role in simplifying construction, and meanwhile, the leveling layer is transformed into a polymer waterproof mortar layer through the use of a waterproof agent and anti-crack fibers so as to improve the overall waterproof quality and durability of the wall.
The technical scheme adopted by the invention is as follows:
the invention discloses a construction method of plastering waterproof mortar for a building external wall, which is characterized by comprising the following steps of:
a base layer processing step: when the surface of the base layer is concrete surface: firstly, picking up the concrete protruding out of the wall surface, performing one-time full brush treatment by using a steel wire brush after chiseling, tightly filling and blocking the holes of the scaffold, leveling the uneven part of the concrete surface by using mortar, and wetting by spraying water; and (4) watering and maintaining after final setting until the cement mortar lumps are completely stuck on the smooth surface of the concrete, and the cement mortar lumps have higher strength.
The method comprises the following steps of hanging a vertical sleeve square, finding a gauge and calibrating ribs: checking the leveling and vertical degree of the wall surface from top to bottom by using a power board on the top layer, determining the thickness of a plastering layer, arranging ash cakes on the upper corners of the periphery of the wall body, vertically marking the wall surface and the ash cakes on the periphery by using a power board or a plumb bob through the ash cakes, taking the thickness as the standard, hanging through wires at the interval of 1.5m, and setting points and positioning layer by layer according to the specification and the size of bricks;
paving water-proof and leveling layer mortar: before paving the mortar of the leveling layer, cleaning the concrete cushion layer again, then watering by a watering can to wet the surface of the concrete cushion layer, leveling and plastering the leveling layer twice, and controlling the interval time among the leveling layers to avoid causing hollowing and cracking due to the influence on the workability and the bonding strength of the mortar;
and (3) maintenance of waterproof mortar: after each layer of mortar on the outer wall is smeared for 8-12 hours, a small amount of water is sprayed by a sprayer for curing, and after 24 hours, a large amount of water can be sprayed for curing, so that the outer wall is always kept in a wet state;
the exterior wall decorative coating construction step: before the construction of the exterior wall coating, coating anti-cracking waterproof putty on the surface of the waterproof mortar, polishing and leveling, then performing decorative coating work on the exterior wall, sequentially laying the decorative coating layers in 5 layers, and laying each layer of the material layer after the leveling work is finished.
Furthermore, in the step of treating the base layer, when the base layer is the aerated concrete block, the water is required to be sprayed for wetting the surface of the concrete two days in advance, and the water is sprayed to the wall surface 1 hour before the ash is batched, so that the aim of fully wetting the wall body is achieved, and the phenomena that the mortar is not strong in binding force with the wall body, and is easy to fall off and layer due to poor mortar fluidity caused by the fact that the wall body is strong in water absorption and absorbs water in the mortar are reduced.
Furthermore, in the steps of finding the gauge and calibrating the ribs, the through lines are arranged between floors, the horizontal through lines are controlled by taking the floors as horizontal datum lines in a high circle, the vertical through lines are controlled by taking large angles around as datum lines to wipe mortar screed ribs with the width of 10cm between upper and lower marks, the mortar screed bars are used for scraping, the thickness of the mortar screed bars is equal to that of the marks, the plastering construction can be carried out after the mortar screed bars are slightly dried, the mortar bottom of the mortar screed bars is enabled to be horizontal and vertical, and meanwhile the design requirements of the water flow gradient and the water dripping line of the decorative surface of the wiring window sill are met.
Furthermore, in the step of paving the waterproof and leveling layer mortar, a mortar layer with the thickness of 25mm of a steel wire mesh is arranged in the middle of the leveling layer, the steel wire mesh is arranged in the mortar layer, firstly, polymer mortar with the thickness of 10mm of a bottom layer is required to be punched, when the mortar is solidified to have certain strength, the phi 2 multiplied by 50 spot welding sheet-shaped hot-dipped steel wire mesh is nailed, and finally, the polymer mortar with the thickness of 15mm is plastered on the other surface of the steel wire mesh.
Furthermore, in the step of paving the waterproof and leveling layer mortar, the mortar layer is prepared by mixing the waterproof mortar with medium sand, the fineness modulus of the sand is 2.3-3.0, the workability of the mortar is enhanced, the adhesion between the mortar and a wall body is enhanced, and the layering and hollowing are reduced.
Furthermore, in the construction step of the exterior wall decorative coating, after the waterproof putty is polished to be flat, the surface layer of the waterproof putty is coated with the heat-insulating primer twice, and the primer is coated on the surface layer for the second time, so that the adhesive force of the finish is improved, and the fullness of the finish is increased.
The invention has the following technical effects:
the conventional polymer mortar waterproof layer with the thickness of 7mm is improved to a polymer mortar waterproof layer with the thickness of 25mm, the waterproof effect is greatly improved, the anti-cracking capability of the concrete is doubled by adding anti-cracking fibers, and the generation and development of concrete cracks are reduced; meanwhile, the waterproof layer and the leveling layer are combined into one, so that the construction structure level is reduced, the construction steps are simplified, the construction efficiency is greatly improved, the construction period is shortened, and the overall cost of main body construction is reduced.
Drawings
FIG. 1 is a flow chart of a construction method of plastering waterproof mortar for an exterior wall of a building;
fig. 2 is a perspective view of a waterproof structure of an exterior wall of a building.
The labels in the figure are: 1-wall, 2-polymer cement paste, 3-polymer steel mesh mortar waterproof and leveling layer, 4-waterproof putty 5-heat-insulating paint primer and 6-waterproof heat-insulating decorative coating.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
In the embodiment, the adopted data is a preferred scheme, but is not used for limiting the invention;
as shown in fig. 1, the embodiment provides a construction method of plastering and waterproof mortar for an exterior wall of a building, which includes the following steps:
a base layer processing step: when the surface of the base layer is concrete, the concrete protruding out of the wall surface is firstly removed, a steel wire brush is used for full brush treatment after roughening, holes of the scaffold are tightly filled, uneven parts of the concrete surface are flattened by mortar, and the concrete is drenched; watering and maintaining after final setting until the cement mortar lumps are completely adhered to the smooth surface of the concrete and have higher strength; preferably, 10% of caustic soda is adopted to clean oil stains on the surface of the base layer, and then the caustic soda is cleaned by using purified water and dried; after the leveling work is finished, the cement mortar doped with LB-71 polymer mortar is thrown to the wall by a broom, the throwing points are uniform, watering and maintenance are carried out after the throwing points are finally set until the cement mortar throwing points are completely bonded to the smooth surface of the concrete, and the cement mortar has higher strength.
When the base layer is the aerated concrete block, the surface of the concrete needs to be drenched two days in advance, and the water is drenched to the wall surface again 1 hour before ash batching, so that the aim of fully moistening the wall body is achieved, and the phenomena of low bonding force between the mortar and the wall body, easy falling and layering caused by poor mortar fluidity due to strong water absorption of the wall body and water absorption in the mortar are reduced; preferably, the water penetration depth is 8-10mm, and after water spraying, a protective layer is brushed by adopting LB-71 polymer cement paste.
The embodiment ensures that the surface of the base concrete is not hollowly and watertight by the base treatment.
The method comprises the following steps of hanging a vertical sleeve square, finding a gauge and calibrating ribs: inspecting the leveling and vertical degree of the wall surface from top to bottom by using a power board on the top layer, and determining the thickness of the plastering layer, preferably, the plastering thickness at the thinnest part is 7 mm; setting 5cm square ash cakes at the upper corners of the periphery of the wall, vertically marking the wall surface and the ash cakes at the periphery by using a line supporting plate or a line hammer for the ash cakes, taking the thickness as the standard, setting the interval to be 1.5m, hanging a through line, and setting points in layers according to the specification and the size of bricks for positioning;
in this embodiment, the lead wire sets up between the floor, and the horizontal lead wire uses the floor to control as the high circle of horizontal datum line, and vertical lead wire uses the wide-angle all around as datum line control to smear the mortar screed that is 10cm between upper and lower sign, scrapes off with the thick stick, and thickness is leveled mutually with the sign, treats to carry out the construction of plastering just dry slightly, makes its ash bottom accomplish violently flat vertical, satisfies the flowing water slope and the drip line design requirement of wiring windowsill veneer simultaneously.
Paving water-proof and leveling layer mortar: before paving the mortar of the leveling layer, cleaning the concrete cushion layer again, then watering by a watering can to wet the surface of the concrete cushion layer, leveling and plastering the leveling layer twice, and controlling the interval time among the leveling layers to avoid causing hollowing and cracking due to the influence on the workability and the bonding strength of the mortar;
in the embodiment, a mortar layer with the thickness of 25mm of a steel wire mesh is arranged in the middle of a leveling layer, the steel wire mesh is arranged in the mortar layer, firstly, polymer mortar with the thickness of 10mm of a bottom layer is punched, when the mortar is solidified to have certain strength, a phi 2 multiplied by 50 spot welding flaky hot-dip steel wire mesh is nailed, finally, polymer mortar with the thickness of 15mm is batched on the other surface of the steel wire mesh, the leveling layer is batched twice, and the steel wire mesh is arranged between the two leveling layers; the plastering interval time between each plastering layer is controlled, so that hollowing and cracking caused by influencing the workability and the bonding strength of mortar are avoided;
preferably, the leveling layer adopts LB-71-dimensional nylon polymer steel mesh mortar with the thickness of 25mm and the ratio of 1:3, LB-19 polypropylene microfiber with the thickness of 1kg/m3 and LB-71-dimensional nylon polymer waterproof agent with the cement amount of 8 percent are mixed, and phi 2X 50 is internally matched for spot welding of the flaky hot-dipped steel wire mesh.
In the embodiment, the waterproof mortar for the mortar layer is prepared by using medium sand, the fineness modulus of the sand is 2.3-3.0, the workability of the mortar is enhanced, the adhesion between the mortar and a wall body is enhanced, and the layering and hollowing are reduced.
And (3) maintenance of waterproof mortar: and after each layer of mortar on the outer wall is smeared for 8-12 hours, spraying a small amount of water by using a sprayer for curing, and after 24 hours, watering and curing in a large amount to keep the outer wall in a wet state frequently.
The exterior wall decorative coating construction step: before the construction of the exterior wall coating, coating anti-cracking waterproof putty on the surface of the waterproof mortar, polishing and leveling, then performing decorative coating work on the exterior wall, sequentially laying the decorative coating layers in 5 layers, and laying each layer of the material layer after the leveling work is finished; furthermore, after the waterproof putty is polished to be flat, the surface layer of the waterproof putty is coated with the heat-insulating primer twice, and the primer is coated on the surface layer for the second time, so that the adhesive force of the finish paint is improved, and the fullness of the finish paint is increased.
As shown in fig. 2, in this embodiment, the following scheme is adopted to perform plastering and waterproof mortar construction on an outdoor wall;
preferably, the outer surface of the wall body 1 is coated with polymer cement slurry 2 made of LB-71-dimensional nylon material together, the polymer cement slurry 2 is coated with a polymer steel mesh mortar waterproof and leveling layer 3 made of LB-71-dimensional nylon material with the thickness of 25mm being 1:3, LB-19 polypropylene microfiber with the thickness of 1kg/m3 and LB 71-dimensional nylon polymer waterproof agent with the cement using amount being 8 percent are mixed, a phi 2 multiplied by 50 spot welding sheet-shaped hot-dip steel wire mesh is arranged in the hot-dip steel wire mesh, the leveling layer is coated in two times, and the steel wire mesh is arranged between the two leveling; the method ensures that the steel wire mesh is arranged in the middle of the section of the mortar, really plays a role in resisting the cracking of the mortar, and also ensures the hidden quality trouble that the mortar with the thickness of 25mm cannot be molded at one time in the construction process;
in the embodiment, LB-80D elastic anti-cracking waterproof putty 4 with the thickness of 1-2mm needs to be scraped after the leveling layer is finished, and the leveling layer of the waterproof putty 4 layer is polished to facilitate the laying of the next layer of material.
And brushing LB-30T heat-insulating paint primer for 1-2 times on the 4 layers of the waterproof putty, and finally smearing LB-30 waterproof heat-insulating decorative paint on the outer wall to finish the construction process of the plastering waterproof mortar for the outer wall of the building.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. A construction method of plastering waterproof mortar for building exterior walls is characterized by comprising the following steps:
a base layer processing step: when the surface of the base layer is concrete surface: firstly, picking up the concrete protruding out of the wall surface, performing one-time full brush treatment by using a steel wire brush after chiseling, tightly filling and blocking the holes of the scaffold, leveling the uneven part of the concrete surface by using mortar, and wetting by spraying water; and (4) watering and maintaining after final setting until the cement mortar lumps are completely stuck on the smooth surface of the concrete, and the cement mortar lumps have higher strength.
The method comprises the following steps of hanging a vertical sleeve square, finding a gauge and calibrating ribs: checking the leveling and vertical degree of the wall surface from top to bottom by using a power board on the top layer, determining the thickness of a plastering layer, arranging ash cakes on the upper corners of the periphery of the wall body, vertically marking the wall surface and the ash cakes on the periphery by using a power board or a plumb bob through the ash cakes, taking the thickness as the standard, hanging through wires at the interval of 1.5m, and setting points and positioning layer by layer according to the specification and the size of bricks;
paving water-proof and leveling layer mortar: before paving the mortar of the leveling layer, cleaning the concrete cushion layer again, then watering by a watering can to wet the surface of the concrete cushion layer, leveling and plastering the leveling layer twice, and controlling the interval time among the leveling layers to avoid causing hollowing and cracking due to the influence on the workability and the bonding strength of the mortar;
and (3) maintenance of waterproof mortar: after each layer of mortar on the outer wall is smeared for 8-12 hours, a small amount of water is sprayed by a sprayer for curing, and after 24 hours, a large amount of water can be sprayed for curing, so that the outer wall is always kept in a wet state;
the exterior wall decorative coating construction step: before the construction of the exterior wall coating, coating anti-cracking waterproof putty on the surface of the waterproof mortar, polishing and leveling, then performing decorative coating work on the exterior wall, sequentially laying the decorative coating layers in 5 layers, and laying each layer of the material layer after the leveling work is finished.
2. The construction method of plastering and waterproofing mortar for exterior walls of buildings according to claim 1, wherein in the step of treating the base layer, when the base layer is an aerated concrete block, the concrete surface is required to be drenched two days in advance, and the water is drenched again to the wall surface 1 hour before the mortar is batched, so that the aim of fully moistening the wall body is achieved, and the phenomena of poor mortar fluidity, weak mortar-wall binding force, easy falling and delamination caused by poor mortar-wall binding force due to the absorption of water in the wall body are reduced.
3. The construction method of plastering waterproof mortar on the outer wall of a building according to claim 1, wherein in the steps of positioning and calibrating the ribs by hanging the vertical sleeve, the through lines are arranged between floors, the horizontal through lines are controlled in a high circle by taking the floors as horizontal datum lines, the vertical through lines are controlled by taking large angles around as datum lines to smear mortar impact ribs with the width of 10cm between the upper marks and the lower marks, the mortar impact ribs are stricken by a wood bar, the thickness of the mortar impact ribs is equal to that of the marks, plastering construction can be carried out after the mortar impact ribs are slightly dried, so that the mortar bottom is horizontally and vertically leveled, and the design requirements of the water flow gradient and the water dripping line of the veneer of the wiring windowsill.
4. The construction method of plastering and waterproofing mortar to the outer wall of a building according to claim 1, wherein in the step of laying mortar to be waterproof and leveling layer, a mortar layer with thickness of 25mm of a steel wire mesh is arranged in the middle of the leveling layer, the arrangement of the steel wire mesh in the mortar layer is firstly to coat polymer mortar with thickness of 10mm to the bottom layer, when the mortar is solidified and has certain strength, a phi 2 x 50 spot welding sheet-shaped hot-dipped steel wire mesh is nailed, and finally the polymer mortar with thickness of 15mm is batched on the other surface of the steel wire mesh.
5. The construction method of the plastering waterproof mortar for the external wall of the building as claimed in claim 4, wherein in the step of paving the waterproof and leveling mortar, the mortar for the mortar layer is prepared by using medium sand, the fineness modulus of the sand is 2.3-3.0, the workability of the mortar is enhanced, the adhesion between the mortar and the wall is enhanced, and the delamination and hollowing are reduced.
6. The construction method of plastering waterproof mortar on exterior wall of building as claimed in claim 1, wherein in the construction step of exterior wall decorative paint, after the waterproof putty is polished to be flat, the surface layer of the waterproof putty is coated with the heat-insulating primer twice, and the primer is coated on the surface layer for the second time, so that the adhesion force of the surface paint is improved and the fullness of the surface paint is increased.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530124A (en) * | 2021-07-27 | 2021-10-22 | 中建一局华江建设有限公司 | Construction method for preventing water-blocking wet plaster inside and outside volcanic rocks on wall surface |
| CN113550451A (en) * | 2021-07-24 | 2021-10-26 | 南京坤佳防水防腐保温工程有限公司 | Waterproof construction method for building outer wall |
| CN114292054A (en) * | 2021-12-01 | 2022-04-08 | 青岛青建新型材料集团有限公司 | Anti-dry cracking alkali-activated concrete inner wall surface layer and construction method thereof |
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| CN103342520A (en) * | 2013-07-01 | 2013-10-09 | 中国地质大学（武汉） | Polymer modified rubber mortar used for building leveling layer and construction method of polymer modified rubber mortar |
| CN104120845A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Construction method for outer wall inorganic thermal mortar coating decorative finishing |
| CN108468413A (en) * | 2018-04-09 | 2018-08-31 | 中建八局第三建设有限公司 | A kind of air-entrained concrete building block exempts from anti-hollowing construction method of plastering |
| CN208996342U (en) * | 2018-09-05 | 2019-06-18 | 上海建工五建集团有限公司 | A kind of external wall Stucco finish structure |
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2020
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|---|---|---|---|---|
| FR2217288A1 (en) * | 1973-02-14 | 1974-09-06 | Bonsal Co W R | Dry premixed cement - for binding wall blocks without mortar |
| CN104120845A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Construction method for outer wall inorganic thermal mortar coating decorative finishing |
| CN103342520A (en) * | 2013-07-01 | 2013-10-09 | 中国地质大学（武汉） | Polymer modified rubber mortar used for building leveling layer and construction method of polymer modified rubber mortar |
| CN108468413A (en) * | 2018-04-09 | 2018-08-31 | 中建八局第三建设有限公司 | A kind of air-entrained concrete building block exempts from anti-hollowing construction method of plastering |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550451A (en) * | 2021-07-24 | 2021-10-26 | 南京坤佳防水防腐保温工程有限公司 | Waterproof construction method for building outer wall |
| CN113530124A (en) * | 2021-07-27 | 2021-10-22 | 中建一局华江建设有限公司 | Construction method for preventing water-blocking wet plaster inside and outside volcanic rocks on wall surface |
| CN113530124B (en) * | 2021-07-27 | 2023-02-21 | 中建一局华江建设有限公司 | Construction method for preventing water-blocking wet plaster inside and outside volcanic rocks on wall surface |
| CN114292054A (en) * | 2021-12-01 | 2022-04-08 | 青岛青建新型材料集团有限公司 | Anti-dry cracking alkali-activated concrete inner wall surface layer and construction method thereof |
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