CN110541574A - Steel structure surface hardening cement paste and concrete residue removing method - Google Patents
Steel structure surface hardening cement paste and concrete residue removing method Download PDFInfo
- Publication number
- CN110541574A CN110541574A CN201910837363.3A CN201910837363A CN110541574A CN 110541574 A CN110541574 A CN 110541574A CN 201910837363 A CN201910837363 A CN 201910837363A CN 110541574 A CN110541574 A CN 110541574A
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- Prior art keywords
- steel structure
- concrete
- paint
- cement paste
- gun head
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/38—Machines, specially adapted for cleaning walls, ceilings, roofs, or the like
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
- A47L11/4036—Parts or details of the surface treating tools
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/002—Arrangements for cleaning building facades
Abstract
The invention belongs to the technical field of construction methods, and discloses a method for removing hardened cement paste and concrete residues on the surface of a steel structure, which comprises the following steps: washing the surface of the steel structure by using a water gun head of a high-pressure cleaning machine at a first incident angle, a first interval distance and a first water outlet pressure, and removing the hardened cement paste area; and the water gun head washes residues on the surface of the steel structure at a second incident angle, a second spacing distance and a second water outlet pressure, and removes the hardened concrete area. The invention has the beneficial effects that: the integrity of the anticorrosive paint on the surface of the steel structure can be ensured, the consumption of subsequent paint repair is saved, the efficiency is higher and the effect is better compared with a manual treatment mode, the labor cost is greatly saved, the construction quality of a subsequent steel structure interface layer or a fire-proof layer is remarkably improved, and powerful support is provided for the popularization of the fabricated steel structure building.
Description
Technical Field
The invention relates to the technical field of construction methods, in particular to a method for removing hardened cement paste and concrete residues on a steel structure surface.
Background
In the construction process of the fabricated steel structure building, the use of cement-based materials such as common concrete, self-compacting concrete and the like is also indispensable. When the concrete is poured or poured by pumping, the steel structure surface is more or less adhered with some splashed or overflowed cement paste or concrete residues. The adhesive force of the hardened cement paste and the surface of the steel structure with the anti-corrosion paint is low, the strength of hardened concrete residues is high, and the adhesive force of the hardened cement paste is higher than that of the surface of the steel structure with the anti-corrosion paint, if the hardened substances are left alone, the adhesive force of a subsequent interface layer or a fire-proof layer is reduced, and the hollow cracking is easily caused. However, the manual cleaning efficiency of the hardened cement paste or concrete residues on the surface of the steel structure is extremely low, and only 4m2 of wall surfaces can be cleaned by a single person per hour, so that the steel structure anti-corrosion paint is easily damaged, and the ideal cleaning effect cannot be achieved. Therefore, how to improve the removal efficiency of the hardened cement paste or concrete residues on the basis of not damaging the anticorrosive paint on the surface of the steel structure becomes an important problem influencing the construction efficiency of the steel structure assembly type building.
Disclosure of Invention
The invention aims to provide a steel structure surface hardening cement paste and a concrete residue removing method, which are used for solving the problems of low cleaning efficiency and poor effect of the existing steel structure surface hardening cement paste and concrete residue, ensuring the integrity of the steel structure surface anti-corrosion paint, greatly saving working hours and meeting the basic requirements of subsequent construction.
In order to achieve the purpose, the invention adopts the following technical scheme:
A steel structure surface hardened cement paste and a concrete residue removing method are provided, the steel structure surface is provided with an anti-corrosion paint, and a hardened cement paste area and a hardened concrete area are formed on the surface of the anti-corrosion paint, and the method comprises the following steps:
Washing the surface of the steel structure by using a water gun head of a high-pressure cleaning machine at a first incident angle, a first interval distance and a first water outlet pressure, and removing the hardened cement paste area;
And the water gun head washes residues on the surface of the steel structure at a second incident angle, a second spacing distance and a second water outlet pressure, and removes the hardened concrete area.
As a preferable scheme of the method for removing the hardened cement paste and the concrete residues on the surface of the steel structure, the anti-corrosion paint comprises epoxy zinc-rich paint serving as a primer and one or more of epoxy micaceous iron paint, epoxy iron red paint, epoxy acrylic paint and polyurethane paint serving as intermediate paint.
As a preferable embodiment of the above-mentioned method for removing hardened cement paste and concrete residues from the surface of a steel structure, the first incident angle is in a range of 30 ° to 90 °.
As a preferable mode of the method for removing hardened cement paste and concrete residues on the surface of the steel structure, the first spacing distance ranges from 100mm to 300 mm.
in a preferable embodiment of the method for removing hardened cement slurry and concrete residues from a surface of a steel structure, the first effluent pressure is in a range of 30MPa to 60 MPa.
As a preferable scheme of the method for removing the hardened cement paste and the concrete residues on the surface of the steel structure, the second incident angle range is between 70 and 80 degrees.
As a preferable mode of the method for removing the hardened cement paste and the concrete residues on the surface of the steel structure, the second spacing distance ranges from 50mm to 100 mm.
As a preferable mode of the method for removing the hardened cement paste and the concrete residues on the surface of the steel structure, the second effluent pressure is in a range of 50MPa to 60 MPa.
As a preferable scheme of the steel structure surface hardening cement paste and the concrete residue removing method, the relative moving speed of the water gun head and the concrete residue during flushing is 10-50 mm/s.
As a preferable scheme of the method for removing the hardened cement paste and the concrete residues on the surface of the steel structure, the water gun head adopts a single-hole rotating water outlet mode and washes the water in one or two modes of an S-shaped track from bottom to top or an M-shaped track from left to right.
The invention has the beneficial effects that: the integrity of the anticorrosive paint on the surface of the steel structure can be ensured, the consumption of subsequent paint repair is saved, the efficiency is higher and the effect is better compared with a manual treatment mode, the labor cost is greatly saved, the construction quality of a subsequent steel structure interface layer or a fire-proof layer is remarkably improved, and powerful support is provided for the popularization of the fabricated steel structure building.
Drawings
FIG. 1 is a steel structural composite according to an embodiment of the present invention;
Fig. 2 is a flow chart of the method for removing hardened cement paste and concrete residues from the surface of a steel structure according to the embodiment of the invention.
In the figure:
100-steel structure; 200-an anticorrosive paint layer; 300-mixed layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
as in fig. 1, the bonding of cement paste and concrete in a steel structure is simulated: preparing a steel structure 100, spraying a plurality of anticorrosive paints on the first surface of the steel structure 100 in sequence after mechanical shot blasting and rust removal to form an anticorrosive paint layer 200, standing for at least one day, completely drying the former anticorrosive paint before spraying the latter anticorrosive paint, and then coating cement paste and concrete on the surface of the anticorrosive paint layer 200 to form a mixed layer 300, wherein the mixed layer 300 comprises a hardened cement paste area and a hardened concrete area.
in the present embodiment, the steel structure 100 has a planar structure, so that the anticorrosive paint layer 200 of uniform thickness is easily formed on the surface of the steel structure 100.
In the present embodiment, the thickness of the anti-corrosive paint layer 200 is not more than 200 μm.
The anticorrosion paint comprises epoxy zinc-rich paint as a primer, and two layers of epoxy mica iron paint as an intermediate paint are sprayed on the epoxy zinc-rich primer. It should be noted that the intermediate paint is not limited to one or more of epoxy iron oxide red paint, epoxy acrylic paint, and polyurethane paint.
Further, the thickness of the mixed layer 300 is not more than 1 mm.
it should be noted that the hardened cement paste area and the hardened concrete area have clear boundaries, no blending exists, and the coverage rate of the mixed layer 300 on the anti-corrosion paint layer 200 is more than 80%.
The following description will be made with reference to a flow chart of the steel structure case hardening cement paste and the concrete residue removing method shown in fig. 2.
Example 1
A water gun head of the S1 high-pressure cleaning machine discharges water in a porous fan shape, the distance between the water gun head and the slurry layer 300 is 100mm, the water gun head moves along a longitudinal (from top to bottom or from bottom to top) S-shaped track, the included angle between the water discharging direction of the water gun head and the plane of the slurry layer 300 is kept at 30 degrees, the water discharging pressure is 30MPa, the flushing speed is 0.5m2/min, after the water gun head is flushed once, the hardened cement slurry area disappears, and only the hardened concrete area remains.
S2 the water gun head adopts single-hole water outlet, the distance between the water gun head and the mud layer is 50mm, the water gun head moves along a transverse M-shaped track (from left to right or from right to left), the included angle between the water outlet direction of the water gun head and the plane of the mud layer 300 is kept at 70 degrees, the water flow emergence angle is 5 degrees, the water outlet pressure is 50MPa, the relative speed of the water gun head relative to a hardened concrete area is 10mm/S, and after the water gun head is washed once, the clearance rate of the hardened concrete area reaches 100%.
example 2
the water gun head of the S1 high-pressure cleaning machine discharges water in a single-hole fan shape, the distance between the water gun head and the mud layer 300 is 130mm, the water gun head moves along a transverse M-shaped track (from left to right or from right to left), the included angle between the water discharging direction of the water gun head and the plane of the mud layer 300 is kept 35 degrees, the water discharging pressure is 38MPa, the flushing speed is 0.7M2/min, after one flushing, the hardened cement slurry area disappears, and only the hardened concrete area remains.
S2 the water gun head adopts single-hole water outlet, the distance between the water gun head and the mud layer is 50mm, the water gun head moves along a transverse M-shaped track (from left to right or from right to left), the included angle between the water outlet direction of the water gun head and the plane of the mud layer 300 is kept 75 degrees, the water flow emergence angle is 6 degrees, the water outlet pressure is 52MPa, the relative speed of the water gun head relative to a hardened concrete area is 15mm/S, and after the water gun head is washed once, the clearance of the hardened concrete area reaches 100%.
Example 3
The water gun head of the S1 high-pressure cleaning machine discharges water in a single-hole fan shape, the distance between the water gun head and the mud layer 300 is 200mm, the water gun head moves along a transverse M-shaped track (from left to right or from right to left), the included angle between the water discharging direction of the water gun head and the plane of the mud layer 300 is kept at 52 degrees, the water discharging pressure is 50MPa, the flushing speed is 0.9M2/min, after one flushing, the hardened cement slurry area disappears, and only the hardened concrete area remains.
S2 the water gun head adopts single-hole water outlet, the distance between the water gun head and the mud layer is 85mm, the water gun head moves along a transverse M-shaped track (from left to right or from right to left), the included angle between the water outlet direction of the water gun head and the plane of the mud layer 300 is kept at 80 degrees, the water flow emergence angle is 7.5 degrees, the water outlet pressure is 58MPa, the relative speed of the water gun head relative to a hardened concrete area is 35mm/S, and after the water gun head is washed once, the clearance rate of the hardened concrete area reaches 100%.
Example 4
The water gun head of the S1 high-pressure cleaning machine discharges water in a single-hole fan shape, the distance between the water gun head and the mud layer 300 is 300mm, the water gun head moves along a transverse M-shaped track (from left to right or from right to left), the included angle between the water discharging direction of the water gun head and the plane of the mud layer 300 is kept at 90 degrees, the water discharging pressure is 60MPa, the flushing speed is 3M2/min, after one flushing, the hardened cement slurry area disappears, and only the hardened concrete area remains.
S2 the water gun head adopts single-hole water outlet, the distance between the water gun head and the mud layer 300 is 100mm, the water gun head moves along a transverse M-shaped track (from left to right or from right to left), the included angle between the water outlet direction of the water gun head and the plane of the mud layer 300 is kept at 80 degrees, the water flow emergence angle is 7 degrees, the water outlet pressure is 60MPa, the relative speed of the water gun head relative to a hardened concrete area is 50mm/S, and after the water gun head is washed once, the clearance rate of the hardened concrete area reaches 100%.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A steel structure surface hardened cement paste and a concrete residue removing method are provided, the steel structure surface is provided with an anti-corrosion paint, and a hardened cement paste area and a hardened concrete area are formed on the surface of the anti-corrosion paint, and the method is characterized by comprising the following steps:
Washing the surface of the steel structure by using a water gun head of a high-pressure cleaning machine at a first incident angle, a first interval distance and a first water outlet pressure, and removing the hardened cement paste area;
And the water gun head washes residues on the surface of the steel structure at a second incident angle, a second spacing distance and a second water outlet pressure, and removes the hardened concrete area.
2. The steel structure surface hardening cement paste and the concrete residue removing method according to claim 1, wherein the anti-corrosion paint comprises one or more of epoxy zinc-rich paint as a primer and epoxy micaceous iron paint, epoxy iron red paint, epoxy acrylic paint and polyurethane paint as an intermediate paint.
3. The steel structure case hardening cement slurry and the concrete residue removing method according to claim 2, wherein the first incident angle is in a range of 30 ° to 90 °.
4. The steel structure case hardening cement slurry and the concrete residue removing method according to claim 3, wherein the first distance is in a range of 100mm to 300 mm.
5. The steel structure case hardening cement slurry and the concrete residue removing method according to claim 4, wherein the first effluent pressure is in a range of 30MPa to 60 MPa.
6. The steel structure case hardening cement slurry and the concrete residue removing method according to claim 1, wherein the second incident angle range is between 70 ° and 80 °.
7. The steel structure case hardening cement slurry and the concrete residue removing method according to claim 6, wherein the second distance is in a range of 50mm to 100 mm.
8. The steel structure case hardening cement slurry and the concrete residue removing method according to claim 7, wherein the second effluent pressure is in a range of 50MPa to 60 MPa.
9. the method for removing hardened cement paste and concrete residues on the surface of a steel structure according to claim 8, wherein the relative movement speed of the water gun head of the high-pressure cleaning machine and the concrete residues during washing is 10-50 mm/s.
10. The method for removing hardened cement paste and concrete residues on the surface of a steel structure according to claim 1, wherein the water gun head is used for discharging water by rotating a single hole and washing the water in one or two modes of an S-shaped track from bottom to top or an M-shaped track from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910837363.3A CN110541574A (en) | 2019-09-05 | 2019-09-05 | Steel structure surface hardening cement paste and concrete residue removing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910837363.3A CN110541574A (en) | 2019-09-05 | 2019-09-05 | Steel structure surface hardening cement paste and concrete residue removing method |
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| CN110541574A true CN110541574A (en) | 2019-12-06 |
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| CN201910837363.3A Pending CN110541574A (en) | 2019-09-05 | 2019-09-05 | Steel structure surface hardening cement paste and concrete residue removing method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5505787A (en) * | 1993-02-01 | 1996-04-09 | Total Service Co., Inc. | Method for cleaning surface of external wall of building |
| CN202638785U (en) * | 2012-05-08 | 2013-01-02 | 武汉中冶斯瑞普科技有限公司 | Band steel surface residue washing device |
| CN103540453A (en) * | 2013-10-17 | 2014-01-29 | 北京新奥混凝土集团有限公司 | Cement concrete scale cleaning agent and preparation method thereof |
| CN106725080A (en) * | 2017-01-16 | 2017-05-31 | 烟台海特林自动化科技有限公司 | A kind of cleaning method |
| CN107448019A (en) * | 2017-09-29 | 2017-12-08 | 贵州天鹰钢结构有限公司 | A kind of steel-structure factory building for being easy to cleaning |
| CN107511307A (en) * | 2017-09-18 | 2017-12-26 | 厦门洽德地面设计工程有限公司 | Novel aqueous system coating and its construction technology on a kind of steel plate |
| CN108160560A (en) * | 2016-12-08 | 2018-06-15 | 赵国臣 | A kind of cleaning machine for being used to remove cement on steel plate |
| CN108222532A (en) * | 2017-12-29 | 2018-06-29 | 上海住总集团建设发展有限公司 | A kind of method for cleaning being used for the granitic plaster alien invasion of historical building |
-
2019
- 2019-09-05 CN CN201910837363.3A patent/CN110541574A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5505787A (en) * | 1993-02-01 | 1996-04-09 | Total Service Co., Inc. | Method for cleaning surface of external wall of building |
| CN202638785U (en) * | 2012-05-08 | 2013-01-02 | 武汉中冶斯瑞普科技有限公司 | Band steel surface residue washing device |
| CN103540453A (en) * | 2013-10-17 | 2014-01-29 | 北京新奥混凝土集团有限公司 | Cement concrete scale cleaning agent and preparation method thereof |
| CN108160560A (en) * | 2016-12-08 | 2018-06-15 | 赵国臣 | A kind of cleaning machine for being used to remove cement on steel plate |
| CN106725080A (en) * | 2017-01-16 | 2017-05-31 | 烟台海特林自动化科技有限公司 | A kind of cleaning method |
| CN107511307A (en) * | 2017-09-18 | 2017-12-26 | 厦门洽德地面设计工程有限公司 | Novel aqueous system coating and its construction technology on a kind of steel plate |
| CN107448019A (en) * | 2017-09-29 | 2017-12-08 | 贵州天鹰钢结构有限公司 | A kind of steel-structure factory building for being easy to cleaning |
| CN108222532A (en) * | 2017-12-29 | 2018-06-29 | 上海住总集团建设发展有限公司 | A kind of method for cleaning being used for the granitic plaster alien invasion of historical building |
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Application publication date: 20191206 |