CN111962788B - Grey supplementing process for installation wire slot - Google Patents

Grey supplementing process for installation wire slot Download PDF

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Publication number
CN111962788B
CN111962788B CN202010788334.5A CN202010788334A CN111962788B CN 111962788 B CN111962788 B CN 111962788B CN 202010788334 A CN202010788334 A CN 202010788334A CN 111962788 B CN111962788 B CN 111962788B
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wire
cement mortar
aerated block
installation wire
installation
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CN111962788A (en
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罗刚
刘建明
李列娟
刘瑞牛
王帅峰
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Scegc No2 Construction Engineering Group Co ltd
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Scegc No2 Construction Engineering Group Co ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00Coverings or linings, e.g. for walls or ceilings
    • E04F13/02Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The invention discloses a process for supplementing ash to an installation wire slot, which comprises the following steps: s1, slotting on the wall surface of the aerated block masonry according to the lofting wire frame, and embedding the wire pipe in the installation wire slot; s2, filling the installation wire casing with cement mortar, compacting and leveling; s3, obtaining aerated block powder by using a pulverizer; s4, feeding the aerated block powder on the surface of cement mortar slurry in the installation wire groove, grinding the aerated block powder by using an iron trowel for multiple times, and lifting the cement mortar slurry in the installation wire groove to the surface layer to bond the cement mortar slurry with the aerated block powder; and S5, coating a film on the wall surface. The process provided by the invention is simple to operate and easy to control, can enable the aerated block masonry wall surface and the installation wire slot filling mortar to have uniform color and no chromatic aberration, has good overall appearance, can also carry out secondary utilization on the damaged waste aerated blocks, realizes the reutilization of green construction waste materials, is energy-saving and environment-friendly, and has great environmental benefits and social benefits.

Description

Grey supplementing process for installation wire slot
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a process for supplementing ash to an installation wire slot.
Background
The existing building wall construction generally adopts site construction and a method of casting concrete on site, and the complete site construction has the following defects: the field construction procedure and management are complex, and the construction cost is high; the construction waste is more, and the construction site is not easy to clean; the noise of the site construction seriously affects the life and work of surrounding residents and is not beneficial to the environmental protection; the quality of site construction is not easy to be guaranteed due to the influence of factors such as building materials, climatic conditions, site management, quality of workers and the like. Therefore, the assembled building is vigorously popularized in China, and now in high-rise buildings, the air-adding blocks are generally adopted and have the advantages of light volume weight, high heat preservation efficiency, good sound absorption, processability and the like.
After the groove is formed in the aerated block masonry wall surface and the pipeline is buried secretly, ash needs to be supplemented to the installation wire groove through mortar, cement mortar is generally used for filling in the traditional ash supplementing process, and due to the fact that position deviation is buried underground through the wire pipe, color bands of different colors such as inclination, verticality and intersection can appear on the wall surface after the cement mortar is filled, and the integral impression of the aerated block masonry wall surface is poor.
Disclosure of Invention
The invention aims to provide an ash supplementing process for an installation wire slot, which is simple in process operation and easy to control, can enable the colors of an aerated block masonry wall surface and mortar filled in the installation wire slot to be uniform and have no color difference, has good integral appearance, can also carry out secondary utilization on a damaged waste aerated block, realizes the reutilization of green construction waste materials, is energy-saving and environment-friendly, and has greater environmental benefit and social benefit so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a process for supplementing ash to an installation wire slot comprises the following steps:
s1, slotting on the wall surface of the aerated block masonry according to the lofting wire frame to obtain an installation wire slot, and embedding the wire tube in the installation wire slot;
s2, filling the installation wire casing with cement mortar, compacting, leveling and filling until the cement mortar slurry is flush with the wall surface of the aerated block masonry;
s3, crushing the damaged waste aerated blocks into powder by using a crusher, and sieving the powder by using a screen to obtain aerated block powder;
s4, feeding the aerated block powder on the surface of cement mortar slurry in the installation wire groove, grinding the aerated block powder by using an iron trowel for multiple times, and lifting the cement mortar slurry in the installation wire groove to the surface layer to bond the cement mortar slurry with the aerated block powder;
and S5, after the cement mortar is solidified for 40-80 min, adhering the coating cut according to the height of the aerated block masonry wall surface to the wall surface, and removing the coating after 5-10 h.
Preferably, the method also comprises the step of cleaning the installation wire slot and cleaning up floating objects in the installation wire slot.
Preferably, in S1, when the groove is formed in the wall surface of the aerated block masonry, the groove is formed in the lofting wire frame by using a grooving machine or manual cutting.
Preferably, the width of the installation wire chase in S1 is the sum of the diameters of the wire chases + the sum of the distances between the wire chases +5mm, and the depth of the installation wire chase is the sum of the diameters of the wire chases +10 mm.
Preferably, the mesh opening diameter of the S3 screen is 0.5 to 2 mm.
Preferably, the aerated block powder in S4 is spread on the surface of the cement mortar slurry not less than 3/4.
Preferably, the cement mortar in the S2 comprises the following components in parts by weight:
50-80 parts of cement, 50-80 parts of sand, 2-10 parts of wind power blade recycled short fiber, 0.3-0.5 part of water reducing agent, 0.1-0.3 part of defoaming agent, 0.3-0.5 part of retarder and 100-400 parts of water.
Preferably, the length of the wind power blade recycled staple fiber is 1-3 mm.
Preferably, the water reducing agent is a slow-release polycarboxylic acid high-efficiency water reducing agent; the defoaming agent is a polyether organic silicon defoaming agent; the retarder is sodium dodecyl benzene sulfonate.
Preferably, the preparation method of the cement mortar comprises the following specific steps:
crushing the wind power blade recycled fibers by using a crusher to obtain wind power blade recycled short fibers;
uniformly mixing cement, sand and the recycled short fibers of the wind turbine blade to obtain a solid mixture, and uniformly mixing a water reducing agent, a defoaming agent, a retarder and water to obtain a liquid mixture;
and adding the solid mixture and the liquid mixture into a reaction container, and uniformly stirring to obtain the cement mortar.
Compared with the prior art, the invention has the beneficial effects that:
the process provided by the invention is simple to operate and easy to control, can enable the aerated block masonry wall surface and the installation wire slot filling mortar to have uniform color and no chromatic aberration, has good overall appearance, can also carry out secondary utilization on the damaged waste aerated blocks, realizes the reutilization of green construction waste materials, is energy-saving and environment-friendly, and has great environmental benefits and social benefits.
Drawings
FIG. 1 is a schematic flow chart of a process for supplementing ash in a mounting wire slot according to the present invention;
FIG. 2 is a schematic flow diagram of a preparation method of cement mortar for an installation wire duct ash-supplementing process of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A process for supplementing ash to an installation wire slot comprises the following steps:
s1, grooving the wall surface of the aerated block masonry by adopting a grooving machine or manual cutting according to the lofting wire frame to obtain an installation wire groove, wherein the width of the installation wire groove is the sum of the diameters of wire pipes and the sum of the distances between the wire pipes plus 5mm, and the depth of the installation wire groove is the sum of the diameters of the wire pipes plus 10 mm;
cleaning the installation wire slot, cleaning up floats in the installation wire slot, and embedding the wire tube in the installation wire slot.
S2, filling the installation wire casing with cement mortar, compacting, leveling and filling until the cement mortar slurry is flush with the wall surface of the aerated block masonry;
the cement mortar comprises the following components in parts by weight: 50 parts of cement, 50 parts of sand, 2 parts of wind power blade recycled staple fiber, 0.3 part of a water reducing agent, 0.1 part of a defoaming agent, 0.3 part of a retarder and 100 parts of water, wherein the length of the wind power blade recycled staple fiber is 1 mm, and the water reducing agent is a slow-release polycarboxylic acid high-efficiency water reducing agent; the defoaming agent is a polyether organic silicon defoaming agent; the retarder is sodium dodecyl benzene sulfonate;
the preparation method of the cement mortar comprises the following specific steps:
crushing the wind power blade recycled fibers by using a crusher to obtain wind power blade recycled short fibers;
uniformly mixing cement, sand and the recycled short fibers of the wind turbine blade to obtain a solid mixture, and uniformly mixing a water reducing agent, a defoaming agent, a retarder and water to obtain a liquid mixture;
and adding the solid mixture and the liquid mixture into a reaction container, and uniformly stirring to obtain the cement mortar.
And S3, crushing the damaged waste aerated block into powder by using a crusher, and sieving the powder by using a sieve with a sieve pore diameter of 0.5 to obtain the aerated block powder.
And S4, feeding the aerated block powder on the surface of the cement mortar slurry in the installation wire groove, paving the aerated block powder on the surface of the cement mortar slurry at least 3/4, grinding the aerated block powder by using an iron trowel for multiple times, lifting the cement mortar slurry in the installation wire groove to the surface layer, and bonding the cement mortar slurry and the aerated block powder.
And S5, after the cement mortar is solidified for 40min, adhering the coating cut according to the height of the aerated block masonry wall surface to the wall surface, and removing the coating after 5 h.
Example 2
A process for supplementing ash to an installation wire slot comprises the following steps:
s1, grooving the wall surface of the aerated block masonry by adopting a grooving machine or manual cutting according to the lofting wire frame to obtain an installation wire groove, wherein the width of the installation wire groove is the sum of the diameters of wire pipes and the sum of the distances between the wire pipes plus 5mm, and the depth of the installation wire groove is the sum of the diameters of the wire pipes plus 10 mm;
cleaning the installation wire slot, cleaning up floats in the installation wire slot, and embedding the wire tube in the installation wire slot.
S2, filling the installation wire casing with cement mortar, compacting, leveling and filling until the cement mortar slurry is flush with the wall surface of the aerated block masonry;
the cement mortar comprises the following components in parts by weight: 65 parts of cement, 65 parts of sand, 6 parts of wind power blade recycled staple fiber, 0.4 part of a water reducing agent, 0.2 part of a defoaming agent, 0.4 part of a retarder and 250 parts of water, wherein the wind power blade recycled staple fiber is 2 mm in length, and the water reducing agent is a slow-release polycarboxylic acid high-efficiency water reducing agent; the defoaming agent is a polyether organic silicon defoaming agent; the retarder is sodium dodecyl benzene sulfonate;
the preparation method of the cement mortar comprises the following specific steps:
crushing the wind power blade recycled fibers by using a crusher to obtain wind power blade recycled short fibers;
uniformly mixing cement, sand and the recycled short fibers of the wind turbine blade to obtain a solid mixture, and uniformly mixing a water reducing agent, a defoaming agent, a retarder and water to obtain a liquid mixture;
and adding the solid mixture and the liquid mixture into a reaction container, and uniformly stirring to obtain the cement mortar.
And S3, crushing the damaged waste aerated block into powder by using a crusher, and sieving the powder by using a sieve with the sieve pore diameter of 1 mm to obtain the aerated block powder.
And S4, feeding the aerated block powder on the surface of the cement mortar slurry in the installation wire groove, paving the aerated block powder on the surface of the cement mortar slurry at least 3/4, grinding the aerated block powder by using an iron trowel for multiple times, lifting the cement mortar slurry in the installation wire groove to the surface layer, and bonding the cement mortar slurry and the aerated block powder.
And S5, after the cement mortar is solidified for 60min, adhering the coating cut according to the height of the wall surface of the aerated block masonry to the wall surface, and removing the coating after 8 h.
Example 3
A process for supplementing ash to an installation wire slot comprises the following steps:
s1, grooving the wall surface of the aerated block masonry by adopting a grooving machine or manual cutting according to the lofting wire frame to obtain an installation wire groove, wherein the width of the installation wire groove is the sum of the diameters of wire pipes and the sum of the distances between the wire pipes plus 5mm, and the depth of the installation wire groove is the sum of the diameters of the wire pipes plus 10 mm;
cleaning the installation wire slot, cleaning up floats in the installation wire slot, and embedding the wire tube in the installation wire slot.
S2, filling the installation wire casing with cement mortar, compacting, leveling and filling until the cement mortar slurry is flush with the wall surface of the aerated block masonry;
the cement mortar comprises the following components in parts by weight: 80 parts of cement, 80 parts of sand, 10 parts of wind power blade recycled staple fiber, 0.5 part of a water reducing agent, 0.3 part of a defoaming agent, 0.5 part of a retarder and 400 parts of water, wherein the wind power blade recycled staple fiber is 3 mm in length, and the water reducing agent is a slow-release polycarboxylic acid high-efficiency water reducing agent; the defoaming agent is a polyether organic silicon defoaming agent; the retarder is sodium dodecyl benzene sulfonate;
the preparation method of the cement mortar comprises the following specific steps:
crushing the wind power blade recycled fibers by using a crusher to obtain wind power blade recycled short fibers;
uniformly mixing cement, sand and the recycled short fibers of the wind turbine blade to obtain a solid mixture, and uniformly mixing a water reducing agent, a defoaming agent, a retarder and water to obtain a liquid mixture;
and adding the solid mixture and the liquid mixture into a reaction container, and uniformly stirring to obtain the cement mortar.
And S3, crushing the damaged waste aerated block into powder by using a crusher, and sieving the powder by using a sieve with the sieve pore diameter of 2 mm to obtain the aerated block powder.
And S4, feeding the aerated block powder on the surface of the cement mortar slurry in the installation wire groove, paving the aerated block powder on the surface of the cement mortar slurry at least 3/4, grinding the aerated block powder by using an iron trowel for multiple times, lifting the cement mortar slurry in the installation wire groove to the surface layer, and bonding the cement mortar slurry and the aerated block powder.
And S5, after the cement mortar is solidified for 80min, adhering the coating cut according to the height of the wall surface of the aerated block masonry to the wall surface, and removing the coating after 10 h.
In conclusion, the process of the invention has simple operation and easy control, can lead the color of the wall surface of the aerated block masonry and the mortar filled in the installation wire slot to be uniform, have no color difference and have good integral impression, meanwhile, the damaged waste air-entraining blocks can be recycled, the recycling of green construction waste materials is realized, the energy is saved, the environment is protected, the cement mortar used in the process of the invention is added with the wind power blade recycled short fiber, thereby providing a better network structure for the cement mortar, can lead other materials such as cement, sand and the like to be tightly combined together, can increase the strength of cement mortar and the shock resistance, the wall surface strength of the aerated block masonry is consistent, meanwhile, the short fiber recovered by the wind power blade has wide source and low cost, the recycled short fibers of the wind power blade are recycled for secondary utilization, so that the recycling of green waste materials is further realized, and the method has great environmental benefit and social benefit.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The process for supplementing the ash in the installation wire slot is characterized by comprising the following steps of:
s1, slotting on the wall surface of the aerated block masonry according to the lofting wire frame to obtain an installation wire slot, and embedding the wire tube in the installation wire slot;
s2, filling the installation wire casing with cement mortar, compacting, leveling and filling until the cement mortar slurry is flush with the wall surface of the aerated block masonry;
s3, crushing the damaged waste aerated blocks into powder by using a crusher, and sieving the powder by using a screen to obtain aerated block powder;
s4, feeding aerated block powder on the surface of cement mortar slurry in the installation wire groove, wherein the aerated block powder is paved on the surface of the cement mortar slurry and is not less than 3/4, grinding the surface of the cement mortar slurry by using an iron trowel for multiple times, and lifting the cement mortar slurry in the installation wire groove to the surface layer to bond the cement mortar slurry and the aerated block powder;
and S5, after the cement mortar is solidified for 40-80 min, adhering the coating cut according to the height of the aerated block masonry wall surface to the wall surface, and removing the coating after 5-10 h.
2. The ash supplementing process for a wire chase according to claim 1, wherein: the method also comprises the step of cleaning the installation wire slot and cleaning up the floating objects in the installation wire slot.
3. The ash supplementing process for a wire chase according to claim 1, wherein: and in the S1, when the wall surface of the aerated block masonry is grooved, a grooving machine or manual cutting is adopted to perform grooving in the lofting wire frame.
4. The ash supplementing process for a wire chase according to claim 1, wherein: the width of the installation wire grooves in the S1 is the sum of the diameters of wire pipes and the sum of the distances between the wire pipes and is +5mm, and the depth of the installation wire grooves is the sum of the diameters of the wire pipes and is +10 mm.
5. The ash supplementing process for a wire chase according to claim 1, wherein: and the aperture of the sieve mesh in the S3 is 0.5-2 mm.
6. The ash supplementing process for a wire chase according to claim 1, wherein: the cement mortar in the S2 comprises the following components in parts by weight:
50-80 parts of cement, 50-80 parts of sand, 2-10 parts of wind power blade recycled short fiber, 0.3-0.5 part of water reducing agent, 0.1-0.3 part of defoaming agent, 0.3-0.5 part of retarder and 100-400 parts of water.
7. The ash supplementing process for a wire chase according to claim 6, wherein: the length of the wind power blade recycled staple fibers is 1-3 mm.
8. The ash supplementing process for a wire chase according to claim 6, wherein: the water reducing agent is a slow-release polycarboxylic acid high-efficiency water reducing agent; the defoaming agent is a polyether organic silicon defoaming agent; the retarder is sodium dodecyl benzene sulfonate.
9. The ash supplementing process for a wire chase according to claim 6, wherein: the preparation method of the cement mortar comprises the following specific steps:
crushing the wind power blade recycled fibers by using a crusher to obtain wind power blade recycled short fibers;
uniformly mixing cement, sand and the recycled short fibers of the wind turbine blade to obtain a solid mixture, and uniformly mixing a water reducing agent, a defoaming agent, a retarder and water to obtain a liquid mixture;
and adding the solid mixture and the liquid mixture into a reaction container, and uniformly stirring to obtain the cement mortar.
CN202010788334.5A 2020-08-07 2020-08-07 Grey supplementing process for installation wire slot Active CN111962788B (en)

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1088743A (en) * 1996-09-18 1998-04-07 Hitachi Chem Co Ltd Repairing method of heat insulating material for folded plate roof
US20110189385A1 (en) * 2010-02-03 2011-08-04 Manuel Darryl F Products and methods for repairing concrete surfaces
CN101844899B (en) * 2010-04-28 2012-09-05 中国文化遗产研究院 Filling and binding material composition
CN103074949A (en) * 2013-02-05 2013-05-01 南通联泷建筑材料有限公司 Construction method for environment-friendly light energy-saving wallboard
JP6657791B2 (en) * 2015-10-30 2020-03-04 Toto株式会社 Repair material and repair method for inorganic plate
CN106639204B (en) * 2016-11-24 2018-10-02 绿城装饰工程集团有限公司 A kind of wire casing fills up the anti-hollowing of painting, cracking method
CN108104502A (en) * 2017-12-27 2018-06-01 太原理工大学 Ancient building brick wall surface protection and crack repairing method based on structural integrity
CN111421682B (en) * 2020-04-27 2021-06-11 安徽大通建设工程有限公司 Construction wall body fluting buried line repair equipment

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