CN105926798A - Novel dedusting concrete wall and construction method thereof - Google Patents
Novel dedusting concrete wall and construction method thereof Download PDFInfo
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- CN105926798A CN105926798A CN201610261410.0A CN201610261410A CN105926798A CN 105926798 A CN105926798 A CN 105926798A CN 201610261410 A CN201610261410 A CN 201610261410A CN 105926798 A CN105926798 A CN 105926798A
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/001—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing unburned clay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building engineering materials, and especially relates to a novel dedusting concrete wall and a construction method thereof. The novel dedusting concrete wall is formed by a concrete wall, metal nets, and an anion generator. The constituent materials of the concrete wall are conventional concrete, clay or coal ashes, and glass fibers, and according to weight ratio, the proportion is 10 to 2-4 to 0.5-1.5. The connection method among metal nets is lap joint. The metal nets are in the concrete wall, and the distance between the metal net and the outer surface of the concrete wall is 50-100 mm. The outer surface of the wall is reserved with a hole, and the anion generator is hung and connected on the metal net through the hole. The raw materials of the concrete wall are natural, and are advantaged by environmental friendly. The materials are low in cost and stable in properties, and have a dedusting function, and the function plays certain role in a use process and in later treatment, and is long effective.
Description
Technical field
The invention belongs to architecture engineering material technical field, particularly relate to a kind of novel dust removing concrete walls and construction method thereof.
Background technology
Dust is the primary pollutant affecting air quality, the main source of building dust dust just.Dust is not only to air ring
Border has an impact, and in the mine of underground, dust excess is easily caused gas explosion, and coal dust is one of the six big disasters in colliery.
Dust not only affects construction quality and progress, and the healthy harm to staff is serious, in the air that people are sucked
Dust (quartz, asbestos etc.) dissolubility little, more serious to harm.The most in recent years, the building of city, various places
If accelerating, size engineering quantity is many, causes building dust and accounts for the proportion of all kinds of dust relatively greatly, and quantity also has up-trend.
Building dust badly influences the quality of local air, endangers respiratory system.Make us worry be not only building dust product
Quantitative change is many, and building dust is again to be most difficult to cleaning in the middle of numerous dust.
The method currently mainly having five kinds of dedustings: closed dedusting (isolation method), filtering type dedusting (bag-type dusting), high pressure are quiet
Electric precipitation, water spray or spray for dust suppression (wet method coagulates dirt), biological nano dust suppression.From dust removing effects, cost-benefit, installation, maintenance
Etc. aspect consider, high-pressure electrostatic precipitation and biological nano dust suppression are more effective.But both approaches is all application
Being used alone in cleaner, cleaner needs certain space when using, and considerably increases construction cost.Comprehensively
Its pluses and minuses, use cleaner effect unsatisfactory, it is therefore desirable to exploitation one can use for a long time in work progress and hold concurrently
The equipment of tool dust removing effects or device.
Summary of the invention
The problem existed for prior art, the present invention provides a kind of novel dust removing concrete walls and construction method thereof, it is therefore an objective to
By existing concrete walls composition and concrete walls construction are made the most perfect, concrete wall is tied mutually with dedusting technology
Close, thus realize dedusting life-time service in work progress, even if removing body of wall, i.e. the when that generation building dust being most also
Can dedusting, save time, laborsaving and promote the effect of dedusting, reduce the generation of dust, reduce dust to air, building machinery, people
The impact that body is healthy.
The novel dust removing concrete walls realizing the object of the invention are made up of concrete wall, wire netting and anion generator；Its
Described in concrete wall composition material be, according to weight ratio, conventional concrete: clay or flyash: glass fibre=10:
2～4:0.5～1.5, described conventional concrete composition according to weight ratio is: cement: sand: stone=1:2～2.5:2；Described
Wire netting size of mesh opening be 5～25mm, select filament strength >=4500kg/cm cold-drawn low-carbon wire, steel wire diameter
0.5～2mm；Connected mode between wire netting is overlap joint, and the spacing of horizontal and vertical adjacent two pieces of wire nettings is 50～100mm,
Wire netting, in concrete walls body, apart from concrete walls external surface distance 50～100mm, is reserved with hole at exterior surface of wall,
Anion generator is articulated on wire netting by hole.
The construction method of above-mentioned novel dust removing concrete walls follows the steps below:
(1) first overlapping wire netting, the spacing of horizontal and vertical adjacent two pieces of wire nettings is 50～100mm, every piece of wire netting
A size of (1～5) × (1～5), calculate the wire netting particular number needed according to wall area；
(2) stirring conventional concrete with blender, conventional concrete composition according to weight ratio is: cement: sand: stone=1:
2～2.5:2, whipping process adds clay or flyash and glass fibre successively, mixing of the concrete wall material produced
The solidifying soil slump is 180 ± 20mm, concrete anti-compression and the impervious requirement complying fully with C35, it is ensured that actual production intensity
Meet the regulation of " Standard for inspection and assessment of strength of concrete " (GBJ107)；
(3) after wire netting being overlapped, the concrete wall material in implantation step (2), wire netting distance wall outer surface
Distance is 50～100mm, after concrete condenses completely, is polished by exterior surface of wall with cement, reserves hole simultaneously, peace
Dress mounting anion generator.
Compared with prior art, the feature of the present invention and providing the benefit that:
First, the concrete wall material of the present invention is made that improvement on the basis of conventional concrete, adds clay or fine coal
Ash and glass fibre；
Granule minimum during wherein clay is the raw-soil, under moisture state, between clay particle, the gravitation of moisture film is cohesive force, due to viscous
The lamellar structure of soil increases the surface area contacted with water, therefore adds caking property, it is possible to effectively serve as the binding agent of soil,
Other granules of the raw-soil are bound together into an entirety.Therefore the raw-soil should need to control the consumption (moisture content of water in dampness
About 10%), to avoid ultimately resulting in component generation crack because water content is the highest.Clay is the Typical Representative of cohesive soil, and tool is strong
The special natures such as plasticity, water absorption, dilatancy, contractility, adsorptivity, frost heave, agglutinating property, fire resistance.Clay excellent
Gesture is to gather materials on the spot, and takes from the raw-soil, thus greatly reduces building cost.Do not affect concrete intensity and
On the basis of workability, improve the coagulability between concrete, reach the purpose of part concrete walls overall pulling down.
Flyash is a kind of artificial pozzolana mixed material, and itself is slightly with or without hydraulic gelling property, but when with powdery with
In the presence of water, can be at room temperature, particularly under the conditions of hydrothermal treatment consists (steam curing), with calcium hydroxide or other alkaline-earth metal hydrogen
Oxide generation chemical reaction, generates the compound with hydraulic gelling property, becomes a kind of material increasing intensity and durability.
In Fuxin Region, due to a large amount of uses of coal resource, flyash is a kind of the most cheap the most common material.The present invention's
In new concrete wall, flyash and clay can select the most cheap additive according to the difference of job location.?
In concrete, adding coal ash has saved substantial amounts of cement and fine aggregate；Decrease water consumption；Improve the sum of concrete batching system
Yi Xing；Enhance the pumpability of concrete；Decrease creeping of concrete；Reduce the heat of hydration, heat energy dilatancy；Improve coagulation
Soil impermeability；Increase the modified of concrete.Flyash concrete has that workability is good, pumpability strong, impact resistance carries
The advantages such as height, frost resistance enhancing.In the physical property of flyash, fineness and granularity are important projects.It directly affects
Other character of flyash, flyash is the thinnest, and the proportion that fine powder accounts for is the biggest, and its activity is the biggest.
If such as the cohesive force of simple Concrete Structure wall, concrete only adding clay or flyash.But
When the dedusting concrete walls later stage uses, wire netting needs to can be only achieved purpose by faint electric current, for preventing by wire netting
Weak current produces negative effect to other parts of construction wall, and this is in concrete and with the addition of glass fibre.Glass fibers
Dimension heatproof is high, does not fires, anti-corruption, heat insulation, sound-proofing good, and tensile strength is high, and electrical insulating property is good, and low price is nonflammable,
Stable chemical nature.So it is most suitable but on the impact of other parts of construction wall to be here used for reducing energising, and due to
The tensile strength of glass fibre is high, also contributes to the cohesive force of concrete walls.
Cold-drawn low-carbon second class steel wire is typically used as welding or tied framework, mesh sheet or stirrup.Concrete has bigger comprcssive strength,
But tensile strength is the lowest, the present invention is also adding wire netting in concrete walls, to improve its tensile strength, so that containing metal
The concrete of net has higher tensile strength, thus can partly replace armored concrete, can save the spiral of costliness
Material, if adding wire netting the most again at armored concrete, then can further improve the intensity of concrete walls, lowering cost.
The novel dust removing concrete walls of the present invention in use, by anion generator by the metal mesh belt in concrete walls
Anion, uses the dust of positively charged in the principle absorption air of electrostatic precipitation.Wire netting except can play dedusting effect it
Outward, it is also possible to increase the support force of body of wall.And during removing building wall, due to unique proportioning and the wire netting of concrete
Combination so that the cohesive force of concrete walls is higher, thus concrete walls can overall or part be removed, from root
Reduce the generation of building dust.
Wire netting absorption dedusting is principle based on ion dedusting as in figure 2 it is shown, because metal is electrically conductive, added by electrostatic field
Carrying weak current makes it produce anion.Anion can make dust cohesion precipitate, and effectively removes PM2.5 and following micronic dust,
The microgranule of even 1 micron, thus reduce the dust harm to health.Nature anion is source to the purification of air
Microgranule in negative oxygen ion with the positively chargeds such as the antibacterial in air, dust, smog combines, and is polymerized to fall thus eliminates powder
The dirt even harm of PM2.5.Negative oxygen ion does Brownian movement in atmosphere, and Brownian movement inherently eliminates minute dusts thing
Effective ways, negative oxygen ion combine floating dust after promote floating dust Brownian movement and eliminate floating dust, experiment prove floating dust diameter the least,
The easiest seizure by negative oxygen ion reduces activity postprecipitation by combination, and suspend the aerial agglomerating change of finely ground particles coagulation
Become big particulate matter, become weight and land on the ground.
In sum, the proportioning raw materials of the concrete walls of the present invention is owing to adding natural material so that these concrete walls have environmental protection
Advantage.The various material prices added are cheap, stable in properties, are materials common in construction.In addition, with
Traditional concrete walls are compared, and new concrete wall also has dedusting function, can play one when in use processing with the later stage
Fixed effect, and permanently effective.
Accompanying drawing explanation
The novel dust removing concrete walls structural representation of Fig. 1 present invention；
Wherein: 1: concrete wall；2: wire netting；3: anion generator；
Fig. 2 be the present invention of the present invention novel dust removing concrete walls in the dedusting absorption principle schematic diagram of wire netting.
Specific implementation method
The detailed description of the invention of the present invention combines schematic diagram and construction embodiment illustrates.
In the embodiment of the present invention, the use temperature range of anion generator is: plain edition-10 DEG C～+60 DEG C or high temperature modification-20 DEG C～
130 DEG C, use humidity < 95%.The wind speed generally used is less than 10m/s, and pulse voltage is generally 50kV, and pulse frequency is 50Hz.
When input power is 50W, the number of ions of generation is about 5 × 1010～5 × 1011Individual/s.
Embodiment
As it is shown in figure 1, the novel dust removing concrete walls of the present invention are made up of concrete wall 1, wire netting 2 and anion generator 3；
Wherein said concrete wall 1 composition material is, according to weight ratio, conventional concrete: clay or flyash: glass fibre
=10:2～4:0.5～1.5, described conventional concrete composition according to weight ratio is: cement: sand: stone=1:2～2.5:2；
Described wire netting 2 size of mesh opening is 5～25mm, selects the cold-drawn low-carbon wire of filament strength >=4500kg/cm, steel wire diameter
0.5～2mm；Connected mode between wire netting 2 is overlap joint, and the spacing of horizontal and vertical adjacent two pieces of wire nettings 2 is
50～100mm, wire netting 2 is in concrete wall 1, and distance concrete walls external surface distance 50～100mm, in body of wall appearance
Face is reserved with hole, and anion generator 3 is articulated on wire netting by hole.
The construction method of above-mentioned novel dust removing concrete walls follows the steps below:
(1) first overlapping wire netting, the spacing of horizontal and vertical adjacent two pieces of wire nettings is 50～100mm, every piece of wire netting
A size of (1～5) × (1～5), calculate the wire netting particular number needed according to wall area；
(2) stirring conventional concrete with blender, conventional concrete composition according to weight ratio is: cement: sand: stone=1:
2～2.5:2, whipping process adds clay or flyash and glass fibre successively, mixing of the concrete wall material produced
The solidifying soil slump is 180 ± 20mm, concrete anti-compression and the impervious requirement complying fully with C35, it is ensured that actual production intensity
Meet the regulation of " Standard for inspection and assessment of strength of concrete " (GBJ107)；
(3) after wire netting being overlapped, the concrete wall material in implantation step (2), wire netting distance wall outer surface
Distance is 50～100mm, after concrete condenses completely, is polished by exterior surface of wall with cement, reserves hole simultaneously, peace
Dress mounting anion generator.
In order to prove the effect of dedusting concrete walls further, two tests are done in cohesive force and two aspects of dedusting function respectively
By reference.
Experiment one
Make dedusting concrete walls and the standard concrete cob wall test specimen of two pieces of 150mm × 150mm × 150mm respectively, in (20 ± 2) DEG C
Temperature and relative humidity humid air more than 95% in maintenance 28 days.
1-1 test for tensile strength
Experimentation meets the technology requirement of JG3019 " concrete test die ", and instrument is pressure testing machine, and precision is ± 1.0%.
Test specimen is placed on instrument, opens testing machine, zeroing, at the uniform velocity load.When the load of testing machine display at that time does not increases, stop
Adjust throttle, until test specimen destroys, record payload values.
1-2 anti-reflecting bending strength test
Experiment outer 2 Loading Method of three branches, testing machine returns to zero, and test specimen is put surely on support.Open testing machine, return to zero, even
Speed loads.When the load of testing machine display at that time does not increases, stop adjusting throttle, until test specimen destroys, record payload values.
1-3 shear strength test
Measure the shearing strength of time with direct shear test, concrete steps are ibid.
1-4 chronicity and endurancing
Chronicity and the durability of concrete sample is detected by the method for freezing slowly.Test specimen carried out freezing-thawing test 28 day age.Before test
Test specimen was taken out from maintenance in 4 days, carry out visual examination, be put in the water of 10 DEG C～20 DEG C immersion subsequently.During immersion, the water surface is at least
Should exceed test specimen end face 20 millimeters, freeze thawing test specimen carries out freezing-thawing test after soaking 4 days.It is indoor that contrast specimen then should be retained in standard curing,
Until after completing freeze-thaw cycle, with the pressure testing simultaneously of freeze proof test specimen.
After immersion, take out test specimen, with wet cloth erasing surface moisture, weigh, insert frame basket by number after can put into household freezer
Start freezing-thawing test.In case, frame basket should be maked somebody a mere figurehead, and test specimen and frame basket contact position should be padded with filler strip, and ensures at least to leave 20 millis
The space of rice, at least keeps the space of 8 millimeters between each test specimen in frame basket.When antifreezing test is freezed temperature should be maintained at-15～
20℃.Test specimen is put into when the temperature inside the box arrives-2 DEG C, and the freeze-off time of test specimen is no less than 4 hours.
1-5 impact ductility test
Test with shock machine.After testing according to impact toughness test test standard, record data.
Experiment two
Make dedusting concrete walls and the normal concrete wall of two pieces of 1m × 1m × 0.2m respectively.
2-1 filter paper and filter membrane are put in baking oven 70 DEG C dried, weigh as on balance.Record initial mass, then by filter membrane
Put into filter membrane clip.
2-2 takes out ready filter membrane clip, loads in sampling head and tightens, and during sampling, filter membrane should be met to dust-laden by dirt face (flour milling)
Air-flow.
2-3 is 20 DEG C in temperature, and humidity is in the confined space of 50%, with the dust patted under blackboard eraser simulation naturalness.
Set up sampler, sample.
After 2-4 sampling terminates, filter membrane is taken off from filter membrane clip, is stored in filter paper and is together put on balance weighing, recording quality.
2-5 usesTwo formula calculate the concentration of dust in air, and carry out
Relatively.
Reinforced concrete wall cohesive force and the dedusting function of the present invention are contrasted with normal concrete wall, as shown in the table.
The mechanical performance of table 1 new concrete of the present invention and the contrast of normal concrete
| Tensile strength | 40%～70% is improved than normal concrete |
| Bending strength | 50%～80% is improved than normal concrete |
| Shearing strength | 50%～80% is improved than normal concrete |
| Chronicity and durability | 120%～150% is improved than normal concrete |
| Impact flexibility | 2～5 times are improved than normal concrete |
The new concrete wall of table 2 present invention and the contrast of common dust removing effects
| Dedusting concrete walls | Normal concrete wall | |
| Energising 1s | 10mg/m3 | 10mg/m3 |
| Energising 5s | 2mg/m3 | 8mg/m3 |
| Energising 10s | 0.3mg/m3 | 4mg/m3 |
By above contrast it can be seen that the new concrete wall of the present invention be suitable for tension, anti-folding, shearing strength and cracking resistance,
Engineering that the item performance requirements such as shock resistance, resisting fatigue, antidetonation, antiknock are higher or part, and its dust removing effects is aobvious and easy
See, be suitably applied housing body of wall, factory's body of wall, public building body of wall etc..
In sum, the design of the monolithic concrete wall of the present invention and construction are all to use cost relatively low as far as possible, are conveniently easy to get
Material, obtained dedusting result is also be effectively protected environment and people healthy.The new concrete body of wall of the present invention
It it is the body of wall of a kind of environmental protection.
Claims (2)
1. novel dust removing concrete walls, it is characterised in that be made up of concrete wall, wire netting and anion generator；Wherein said concrete wall composition material is, according to weight ratio, conventional concrete: clay or flyash: glass fibre=10:2 ~ 4:0.5 ~ 1.5, described conventional concrete composition according to weight ratio is: cement: sand: stone=1:2 ~ 2.5:2；Described wire netting size of mesh opening is 5 ~ 25mm, selects the cold-drawn low-carbon wire of filament strength >=4500kg/cm, steel wire diameter 0.5 ~ 2mm；Connected mode between wire netting is overlap joint, the spacing of horizontal and vertical adjacent two pieces of wire nettings is 50 ~ 100mm, and wire netting is in concrete walls body, apart from concrete walls external surface distance 50 ~ 100mm, being reserved with hole at exterior surface of wall, anion generator is articulated on wire netting by hole.
The construction method of a kind of novel dust removing concrete walls the most according to claim 1, it is characterised in that follow the steps below:
(1) first overlapping wire netting, the spacing of horizontal and vertical adjacent two pieces of wire nettings is 50 ~ 100mm, and the size of every piece of wire netting is (1 ~ 5) × (1 ~ 5), calculates the wire netting particular number needed according to wall area；
(2) conventional concrete is stirred with blender, conventional concrete composition according to weight ratio is: cement: sand: stone=1:2 ~ 2.5:2, clay or flyash and glass fibre is added successively in whipping process, the concrete slump of the concrete wall material produced is 18020mm, concrete anti-compression and the impervious requirement complying fully with C35, it is ensured that actual production intensity meets the regulation of GBJ107；
(3) after wire netting being overlapped, the concrete wall material in implantation step (2), wire netting distance wall outer surface distance is 50 ~ 100mm, after concrete condenses completely, with cement, exterior surface of wall is polished, reserve hole simultaneously, mounting anion generator is installed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108986948A (en) * | 2018-07-18 | 2018-12-11 | 河南灿坤量子科技有限公司 | A kind of photon multipotency amount turns the design preparation method according to machining energy cabin |
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| CN108986948A (en) * | 2018-07-18 | 2018-12-11 | 河南灿坤量子科技有限公司 | A kind of photon multipotency amount turns the design preparation method according to machining energy cabin |
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| Publication number | Publication date |
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| CN105926798B (en) | 2018-10-02 |
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