CN101672109B - Construction method for spraying polymer mortar aiming at structural strengthening - Google Patents
Construction method for spraying polymer mortar aiming at structural strengthening Download PDFInfo
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- CN101672109B CN101672109B CN2009101961043A CN200910196104A CN101672109B CN 101672109 B CN101672109 B CN 101672109B CN 2009101961043 A CN2009101961043 A CN 2009101961043A CN 200910196104 A CN200910196104 A CN 200910196104A CN 101672109 B CN101672109 B CN 101672109B
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Abstract
The invention discloses a construction method for spraying polymer mortar aiming at structural strengthening. The construction method comprises the following steps: 1. cleaning the surface needing structural strengthening, and constructing steel wire meshes or steel bar meshes; 2. spraying interfacial agent onto the base surface needing structural strengthening by a bomb-spraying gun; 3. connecting a mortar sprayer with an air compressor, and spraying the polymer mortar onto the base surface by the compressed air; 4. spraying the polymer mortar layer by layer, wherein, the steel wire meshes or the steel bar meshes need to be substantially covered in a first layer, and the following layer is to be sprayed until the polymer mortar in the first layer is initially set; and carrying out the sub-region line production at the interval of the initial setting time; and 5. leveling the surface of the mortar layer by using a ruler until the sprayed mortar reaches the design thickness, and further floating and finishing by a trowel dipped in water. The invention has the advantages that the thickness of the mortar layer reaches 10cm, the formation is dense, and the polymer mortar is securely bonded with the base layer, the steel wires and the steel bars; and the invention avoids the problems easily caused by manual operations, concerning the quality of the mortar layer, such as, hollowness, layering, segregation, dropping off, non-uniform thickness and the like.
Description
Technical field
The present invention discloses a kind of construction techniques, is particularly useful for the construction of the polymer mortar layer in the structure enlarging section method.
Background technology
In enlarging section method reinforcing technique, the past is normally adopted the job practices of formwork grouting.The formwork grouting need be built the template construction link, and is long in time limit, template cost height; The surface layer that strengthens is relatively thinner usually, reinforcing bar is close, and is high to the workability requirement of grouting agent, so material price is also high, and forming quality is not easy control.And adopt steel wire mesh (steel mesh reinforcement)-polymer mortar reinforcing technique, and not needing a template, speed of application is fast, and is also not high to the workability requirement of material, is a kind of very promising novel reinforced technology.Conventional cement mortar can adopt manually plasters or way that machine sprays, but (be generally 3～6cm because the mortar layer thickness is bigger in the structural strengthening, reach as high as 10cm), there are steel wire mesh or steel mesh reinforcement to exist, and the polymer mortar denseness is big, viscosity is big, wet density is big, sand content is high, sand grains is big, injection has all brought difficulty with machine to manually plastering, and has greatly limited the range of application of steel wire mesh (steel mesh reinforcement)-polymer mortar reinforcing technique.
At present, the method for manually plastering is still used in the construction of polymer mortar layer mostly in steel wire mesh (steel mesh reinforcement)-polymer mortar reinforcing technique.Manually plaster and have a lot of defectives: when reinforcing screed thickness requirement 6cm was above, manually plastering was difficult to realize compacting; Artifact is easy to cause construction quality fluctuation, screed became uneven; The dynamics of plastering is not easy control, the excessive mortar surface segregation that causes easily, and dynamics is too small then to break away from easily; Manually plastering also occurs the situation of workman's spice on work plane easily, not only causes the situation of random change material mixture ratio, and causes ground dirt, waste of material easily; The existence of steel wire mesh and steel mesh reinforcement forms hollowing behind at reinforcing bar easily also for manually-operated has brought difficulty.In addition, because operating difficulties, man efficiency is very low.
And present injection mortar technology is mainly used in thin plastering or the decoration mortar construction, employing be conventional cement mortar or putty.And the polymer mortar that structure is used is different with conventional cement mortar or putty, has characteristics such as denseness is big, viscosity is big, wet density is big, sand content is high, sand grains is big, adopts existing spraying technique injection difficulty big, and plugging easily is difficult to practical application.
Summary of the invention
Technical problem to be solved by this invention provides a kind of spraying polymer mortar job practices that is used for structural strengthening, to overcome the above-mentioned defective of prior art.
The technical scheme of technical solution problem of the present invention is as follows: a kind of spraying polymer mortar job practices that is used for structural strengthening comprises the steps:
(1) surface of need ruggedized construction is cleared up construction reinforced bar net or steel wire mesh;
(2) bullet is coated with rifle and is connected, utilize bullet to be coated with rifle and interfacial agents is injected on the basal plane that needs ruggedized construction with air compressor;
(3) polymer mortar that stirs is inserted in the sand-slurry jetting machine that high abrasion pump core is housed, sand-slurry jetting machine is linked to each other with air compressor, utilize compressed air that polymer mortar is sprayed onto on the described basal plane;
(4) layering spraying polymer mortar, first floor require basic steel mesh reinforcement or the steel wire mesh of covering, and treat to descend after the initial set of first floor polymer mortar the injection of one deck again; Utilize the initial setting time at interval, carry out the subregion continuous productive process;
(5) after the injection mortar reaches design thickness, use ruler to scrape the flat mortar layer surface, dip in the floating receipts light of water with trowel again.
Preferably, also comprise 24 hours in advance in the described step (1) and treat that ruggedized construction sprays water wettingly, guaranteeing before sprayed construction, treat the surface wettability of ruggedized construction and do not have open fire.
Preferably, also be included in the described step (1) on the surface that needs ruggedized construction and carry out ash cake in advance, the ash cake spacing is not more than 2m.
Preferably, the air compressor air mass flow in the described step (3) is 0.6-1.0m
3/ min, air pressure is 1-1.25MPa, the nozzle of sand-slurry jetting machine is from basal plane 10-20cm.
Preferably, the discharge capacity of the sand-slurry jetting machine in the described step (3) is 7-40L/min, and rotating speed is 170 commentaries on classics/min; Described sand-slurry jetting machine adopts the adjustable pump core of internal diameter of stator.
Preferably, temporarily shut down if desired in the described step (4), can be in stopping process start machine No. one time in every 3-5 minute, allow mortar circulate in hopper and pipeline, carrying out once, avoid causing plugging because of mortar solidifies.
Preferably, in the described step (4), should first small angle inclination spray, described steel mesh reinforcement or steel wire mesh are tamped behind, vertical again basal plane sprays other positions.
Preferably, in the described step (4), last one layer of polymeric mortar injection will be tried one's best even, smooth and be satisfied the design thickness requirement, with workload and the difficulty that reduces artificial floating press polish.
Preferably, the ruler that uses in the described step (5) is 2 meters guiding rulers.
Preferably, the polymer mortar in the described step (3) adds water automatically by the dry powder polymer mortar and stirs and to form in mortar mixer.
By above disclosed technical scheme as can be known, job practices of the present invention is compared with the traditional handicraft that routine is manually plastered and is had following advantage:
1. but application property aspect: the spraying polymer mortar construction can evenly, effectively be ejected into reinforcing bar behind and in the slight gap with mortar by compressed-air actuated strength, accomplishes closely knit.When screed thickness is big, can layering spray, maximum ga(u)ge can reach 10cm, has ensured that effectively steel strand (steel mesh reinforcement)-polymer mortar reinforcing technique applies the structural strengthening field.In addition, the vertical distance of machine pumping can reach 20m, and lateral separation can reach 50m, can realize remote conveying, has unique construction advantage under the condition of limited of operating space.
2. work efficiency aspect: the polymer mortar layer design thickness is to use the present invention under the situation of 5cm, and under reasonably the subregion continuous productive process was arranged, machine-team 6 people can finish 120～150m in one day
2Construction area, be enhanced about more than once than artificial work efficiency, also greatly reduce simultaneously working strength of workers.
3. cost of labor aspect: job practices of the present invention is low to workman's technical requirements, does not need to be equipped with too many skilled worker, has saved cost of labor.
4. construction quality aspect: mortar mixer charging proportioning is constant, and discharging speed is even; The compressed air at sand-slurry jetting machine nozzle place can evenly and effectively dispel mortar, be bonded on the basal plane, has avoided hollowing, layering effectively, emanates, comes off, problem such as became uneven.
5. working environment aspect: the spraying polymer mortar job practices since stir and course of injection in whole use machines, stopped people's situation of material mixture ratio for a change, avoided material to leak, both saved consumption, kept ground clean and tidy again.Because the contact process of workman and mortar shortens, and has reduced the injury of the adding ingredient in the mortar to skin and respiratory system.
In a word, the invention solves common technology can't construct thicker screed, reinforcing bar and the screed bond effect is poor, forming quality is poor, the construction cost height, efficiency of construction is low, quality fluctuates easily, easy people's problems such as poor, the labour intensity height of proportioning, construction environment for a change.
The specific embodiment
(1) interface processing
Remove the surface and oil contaminant and the loose part that need ruggedized construction.For the ease of control screed thickness, on the surface of need ruggedized construction, carry out ash cake in advance, the ash cake spacing is not more than 2m.Designing requirement colligation steel wire mesh or steel mesh reinforcement are pressed in outside in need ruggedized construction.In order to guarantee the good combination of structural interface and interfacial agents, preferably treated ruggedized construction in 24 hours in advance and spray water wettingly, guaranteeing before sprayed construction, treat the surface wettability of ruggedized construction and do not have open fire.
(2) interfacial agents is sprayed
The cement based interfacial agents and the water that use pneumatic hammer will contain the polyacrylate composition manually mix and stir, and bullet is coated with rifle is connected with air compressor, utilize bullet to be coated with rifle interfacial agents is injected on the basal plane that needs ruggedized construction.
(3) mortar stirs
Select up-to-standard dry powder polymer mortar for use, pour in the mortar mixer, constant flow adds water automatically and stirs, and the polymer mortar that stirs is inserted in the sand-slurry jetting machine again.
(4) mortar sprays
Use the pumping type sand-slurry jetting machine, polymer mortar is pumped into the nozzle place by leather hose, air compressor is linked to each other with the nozzle of sand-slurry jetting machine, utilize compressed air that polymer mortar is sprayed onto on the basal plane to be reinforced.The air compressor air mass flow is 0.6-1.0m
3/ min, air pressure is 1-1.25MPa, the nozzle of sand-slurry jetting machine is from basal plane 10-20cm.Sand-slurry jetting machine preferably uses the high abrasion pump core of the internal diameter of the adjustable son of adjusting, so that adjust the elasticity of pump core, improves its application life, guarantees to work continuously.The discharge capacity of sand-slurry jetting machine is 7-40L/min, and rotating speed is 170 commentaries on classics/min.Injection layering, subregion carry out.First floor requires basic steel mesh reinforcement or the steel wire mesh of covering, when carrying out the mortar injection, owing to there is steel mesh reinforcement to exist, should suitably tilt to carry out the low-angle nozzle, spray along vertical muscle of steel mesh reinforcement or horizontal bar earlier, mortar is behind tamped, make that nozzle is vertical with basal plane to be sprayed again, the nozzle that laterally moves around evenly covers basal plane and steel wire mesh or steel mesh reinforcement.Treat to descend again after the initial set of first floor polymer mortar the injection of one deck; Utilize the initial setting time at interval, carry out the subregion continuous productive process; Last one layer of polymeric mortar injection will be tried one's best even, smooth and be satisfied the design thickness requirement, with workload and the difficulty that reduces artificial floating press polish.In the sand-slurry jetting machine course of work, temporarily shut down if desired, can be in stopping process start machine No. one time in every 3-5 minute, allow mortar circulate in hopper and pipeline, carrying out once, avoid causing plugging because of mortar solidifies.
(5) floating and receipts light
When jet thickness reaches designing requirement, use a long ruler (such as 2 meters guiding rulers commonly used in the construction) that screed is floating, dip in the floating receipts light of water with trowel at last and get final product.
Claims (8)
1. a spraying polymer mortar job practices that is used for structural strengthening is characterized in that, comprises the steps:
(1) surface of need ruggedized construction is cleared up construction reinforced bar net or steel wire mesh;
(2) bullet is coated with rifle and is connected, utilize bullet to be coated with rifle and interfacial agents is injected on the basal plane that needs ruggedized construction with air compressor;
(3) the dry powder polymer mortar is added water automatically in mortar mixer and stir into polymer mortar, the polymer mortar that stirs is inserted in the sand-slurry jetting machine that high abrasion pump core is housed, sand-slurry jetting machine is linked to each other with air compressor, utilize compressed air that polymer mortar is sprayed onto on the described basal plane, the air compressor air mass flow is 0.6-1.0m
3/ min, air pressure is 1-1.25MPa, the nozzle of sand-slurry jetting machine is from basal plane 10-20cm;
(4) layering spraying polymer mortar, first floor require basic steel mesh reinforcement or the steel wire mesh of covering, and treat to descend after the initial set of first floor polymer mortar the injection of one deck again; Utilize the initial setting time at interval, carry out the subregion continuous productive process;
(5) after the injection mortar reaches design thickness, use ruler to scrape the flat mortar layer surface, dip in the floating receipts light of water with trowel again.
2. the spraying polymer mortar job practices that is used for structural strengthening according to claim 1, it is characterized in that, also comprise 24 hours in advance in the described step (1) and treat that ruggedized construction sprays water wettingly, guaranteeing before sprayed construction, treat the surface wettability of ruggedized construction and do not have open fire.
3. the spraying polymer mortar job practices that is used for structural strengthening according to claim 1 is characterized in that, also is included in the described step (1) on the surface that needs ruggedized construction and carries out ash cake in advance, and the ash cake spacing is not more than 2m.
4. the spraying polymer mortar job practices that is used for structural strengthening according to claim 1 is characterized in that the discharge capacity of the sand-slurry jetting machine in the described step (3) is 7-40L/min, and rotating speed is 170 commentaries on classics/min; Described sand-slurry jetting machine adopts the adjustable pump core of internal diameter of stator.
5. the spraying polymer mortar job practices that is used for structural strengthening according to claim 1; it is characterized in that; temporarily shut down if desired in the described step (4); can be in stopping process start No. one time machine in every 3-5 minute; allow mortar in hopper and pipeline, carry out once in the circulation, avoid causing plugging because of mortar solidifies.
6. the spraying polymer mortar job practices that is used for structural strengthening according to claim 1 is characterized in that, in the described step (4), should first small angle inclination spray, and described steel mesh reinforcement or steel wire mesh are tamped behind, and vertical again basal plane sprays other positions.
7. the spraying polymer mortar job practices that is used for structural strengthening according to claim 1, it is characterized in that, in the described step (4), last one layer of polymeric mortar injection will be tried one's best even, smooth and be satisfied the design thickness requirement, with workload and the difficulty that reduces artificial floating press polish.
8. the spraying polymer mortar job practices that is used for structural strengthening according to claim 1 is characterized in that, the ruler that uses in the described step (5) is 2 meters guiding rulers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101961043A CN101672109B (en) | 2009-09-22 | 2009-09-22 | Construction method for spraying polymer mortar aiming at structural strengthening |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101961043A CN101672109B (en) | 2009-09-22 | 2009-09-22 | Construction method for spraying polymer mortar aiming at structural strengthening |
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| CN101672109A CN101672109A (en) | 2010-03-17 |
| CN101672109B true CN101672109B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101961043A Expired - Fee Related CN101672109B (en) | 2009-09-22 | 2009-09-22 | Construction method for spraying polymer mortar aiming at structural strengthening |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852023B (en) * | 2010-05-24 | 2012-10-10 | 深圳大学 | Reinforced concrete structure and reinforcement method |
| CN103321448A (en) * | 2013-07-15 | 2013-09-25 | 南通华新建工集团有限公司 | Construction process for reinforcing wall of building |
| CN104746891B (en) * | 2015-01-29 | 2017-02-22 | 安徽省金田建筑设计咨询有限责任公司 | Construction method for strengthening masonry structure by epoxy steel plates |
| CN106049867A (en) * | 2016-06-23 | 2016-10-26 | 郑州三迪建筑科技有限公司 | Building method for special-shaped building model |
| CN106437155A (en) * | 2016-10-09 | 2017-02-22 | 郑州三迪建筑科技有限公司 | Irregular building style construction method |
| CN110318555A (en) * | 2019-07-18 | 2019-10-11 | 卡本科技集团股份有限公司 | A kind of high tensile steel wire fabric reinforcing method |
| CN110409769A (en) * | 2019-08-13 | 2019-11-05 | 南通装配式建筑与智能结构研究院 | A kind of fast gravity die high intensity heavy Machine-blasting mortar construction of long-distance sand transport |
| CN112459235A (en) * | 2020-11-25 | 2021-03-09 | 中建海峡建设发展有限公司 | Formwork-supporting-free construction method for thin-wall special-shaped building |
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2009
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