CN110078453A - A kind of lightweight concrete and its preparation method and application - Google Patents
A kind of lightweight concrete and its preparation method and application Download PDFInfo
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- CN110078453A CN110078453A CN201910246547.2A CN201910246547A CN110078453A CN 110078453 A CN110078453 A CN 110078453A CN 201910246547 A CN201910246547 A CN 201910246547A CN 110078453 A CN110078453 A CN 110078453A
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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- 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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of lightweight concretes and its preparation method and application.This lightweight concrete includes raw material below: cement, construction waste, calcium oxide, fiber, water-reducing agent, foam stabilizer, air entraining agent, cellulose ether, foaming agent, hydrogen peroxide, swelling agent, suspending agent, thickener, calcium hydroxide, flyash, water.The preparation method of this lightweight concrete is also disclosed simultaneously.The invention also discloses this lightweight concretes of application to be applied to the cast-in-place construction method of non-load bearing wall, comprising the following steps: 1) in scheduled non-load bearing wall position mounting structure column；2) pre-buried water pipe, electric wire；3) non-bearing wall body template is installed；4) above-mentioned lightweight concrete is poured into template；5) after completion to be cast 24 hours, form removal；6) wall is conserved, is arranged.Lightweight concrete of the invention has the characteristics that lightweight, high-strength, at low cost, has good economic, society and environmental benefit.
Description
Technical field
The invention belongs to technical field of building construction, more particularly to a kind of lightweight concrete and preparation method thereof and answer
With.
Background technique
With the continuous quickening of China's Development of China's Urbanization, city Support during Old City Reconstruction and the construction of cities and towns new district are generated and are largely built
Build waste material.It is shown according to Chinese Academy of Sciences's research report, the construction waste that China generates in construction every year is up to 2,000,000,000 tons of left sides
It is right.It tears open simultaneously, build the infrastructure such as road and bridge and quickly increase, construction waste discharge amount keeps high-order, it is estimated that, coming 10 years
China will generate 2,000,000,000 tons or more of construction waste every year on average.Waste material besieged city phenomenon is increasingly severe.How waste material is solved
The problem in besieged city realizes economical and eco-friendly sound development, is the Important Problems of this field worker concern.
Fabricated construction technology has been achieved for a series of achievement, while the non-structural technology of assembled is such as: stair, sun
Platform, bathroom etc. also obtain significant breakthrough.But tradition builds filling system at present and technique seriously restricts industrialization development.It passes
The mode of building a wall of system is needed using construction materials such as brick, sand, cement, and cost of material is high.It needs to occupy in work progress
Phenomena such as a large amount of working space, is easy to produce fugitive dust, and there are dirty, unrest, difference at scene of building a wall.Existing technical construction column needs only
Upright casting is built, and cost of labor is higher.Setting pipeline of slotting to wall is needed, this damages wall.Generally exist after being built into wall
Cement mortar is smeared on wall two sides, but due to the shrinking percentage and water imbibition difference of brick body and mortar etc. are many, traditional wall
It is easy to appear " hollowing " phenomenon, causes serious wall quality problem.Currently, people are to the quality of architectural engineering, safe and environment-friendly
Etc. requirement it is also higher and higher, building trade gradually develops to the direction of greenization, environmental protection and energy saving, comfortableization, above-mentioned
The problem of urgent need to resolve.
Summary of the invention
Of the existing technology in order to overcome the problems, such as, one of the objects of the present invention is to provide a kind of lightweight concretes, originally
The second purpose of invention is to provide the preparation method of this lightweight concrete, and the third object of the present invention is to provide will be this
Lightweight concrete is applied to the cast-in-place construction method of non-load bearing wall.
The present invention is by being prepared a kind of regenerated environment protecting material lightweight concrete using construction waste and cement as raw material.
Inventive principle is as follows: the substances such as calcium, silicon in cement and construction waste and additive generate walls by hydration reaction.It is sending out
After gas, walls hardness is enough to support the weight in integral foam hole.It is whole since the bubble of generation is closed in walls
Many micro bubbles will be covered with inside a wall, to make the material that there is sound insulation, insulation, environmental protection, durable, Yi Jirong
Heavy and light, intensity is high, the multifrequency natures such as at low cost.
The technical solution used in the present invention is:
The present invention provides a kind of lightweight concrete, the raw material including following mass parts: 2000~3000 parts of cement, 8000
~12000 construction wastes, 40~60 parts of calcium oxide, 5~8 parts of fibers, 8~12 parts of water-reducing agents, 0.8~2.5 portion of foam stabilizer, 8~
18 parts of air entraining agents, 1.5~3 parts of cellulose ethers, 10~20 parts of foaming agents, 8~16 parts of hydrogen peroxide, 10~20 parts of swelling agents, 8~14
Part suspending agent, 3~5 parts of thickeners, 10~18 parts of calcium hydroxides, 200~350 parts of flyash, 2200~3600 parts of water；Wherein,
The construction waste includes one of discarded concrete, discarded brick and tile, discarded stone grain, waste gypsum, waste mortar, waste residue soil or more
Kind.
Preferably, in this lightweight concrete, the intensity of cement is not less than 32.5 grades.
Preferably, in this lightweight concrete, cement is ordinary portland cement.
Preferably, in this lightweight concrete, partial size < 5mm of construction waste；It is further preferred that the grain of construction waste
Diameter < 3mm.
Preferably, in this lightweight concrete, fiber is staple fibre.
Preferably, in this lightweight concrete, cellulose ether is selected from methylcellulose, hydroxypropyl methyl cellulose, hydroxyl second
At least one of base cellulose, carboxymethyl cellulose.
Preferably, in this lightweight concrete, water-reducing agent is selected from lignin sulfonate water-reducing agent, naphthalene water reducer, three
Poly cyanamid based water reducer, sulfamate based water reducer, at least one of fatty acid series water-reducing agent, poly carboxylic acid series water reducer；
It is further preferred that water-reducing agent is poly carboxylic acid series water reducer.Polycarboxylate water-reducer primarily serves dispersion cement, improves fluidity
Effect.
Preferably, in this lightweight concrete, foam stabilizer is silicone amide foam stabilizer.
Preferably, in this lightweight concrete, air entraining agent be selected from rosin tree lipid air entraining agent, alkyl sulfonic acid class air entraining agent,
At least one of fatty alcohol sulfonate class air entraining agent, petroleum sulphur hydrochloric acid air entraining agent；It is further preferred that air entraining agent is selected from alkyl
At least one of sulphonic acids air entraining agent, fatty alcohol sulfonate class air entraining agent；Still further preferably, air entraining agent is selected from dodecane
At least one of base benzene sulfonic acid sodium salt, dodecyl sodium sulfate, cetyl benzenesulfonic acid sodium.
Preferably, in this lightweight concrete, foaming agent is selected from metallic aluminium powder foaming agent, vegetable protein foaming agent, animal
At least one of protein foaming agent, resin soaps foaming agent.
Preferably, in this lightweight concrete, swelling agent is in calcium sulphoaluminate class swelling agent, calcium oxide expansion agents
It is at least one；It is further preferred that swelling agent in UEA swelling agent, AEA swelling agent, HEA swelling agent, ZY swelling agent extremely
Few one kind.
Preferably, in this lightweight concrete, suspending agent is selected from silicon powder, precipitated calcium carbonate, bentonite, attapulgite, cunning
At least one of mountain flour；It is further preferred that suspending agent is selected from least one of precipitated calcium carbonate, bentonite, talcum powder.
Preferably, in this lightweight concrete, thickener is in polyacrylamide, Sodium Polyacrylate, polyvinyl alcohol
It is at least one.
Preferably, in this lightweight concrete, the mass concentration of hydrogen peroxide is 27.5%~35% in hydrogen peroxide.
The present invention also provides the preparation methods of this lightweight concrete, comprising the following steps:
1) raw material is weighed according to above-mentioned composition；
2) construction waste and calcium oxide are uniformly mixed, the water of 1000~1500 mass parts is added, stood, pre-processed
Aggregate；
3) water for pre-processing aggregate, cement, fiber, flyash and surplus is uniformly mixed；Add water-reducing agent, foam stabilizing
Agent, air entraining agent, cellulose ether, foaming agent, swelling agent, suspending agent, thickener, calcium hydroxide are uniformly mixed；Then dioxygen is added
Water is mixed, obtains lightweight concrete.
Preferably, in the preparation method step 2) of this lightweight concrete, the time of standing is 2h~5h.
Preferably, in the preparation method step 3) of this lightweight concrete, aggregate, cement, fiber, flyash will be pre-processed
The time mixed with the water of surplus is 1.5min~3min.
The present invention also provides this lightweight concretes to be applied to the cast-in-place construction method of non-load bearing wall, this non-load bearing wall
Cast-in-place construction method, comprising the following steps:
1) in scheduled non-load bearing wall position mounting structure column；
2) pre-buried water pipe, electric wire；
3) non-bearing wall body template is installed；
4) above-mentioned lightweight concrete is poured into template；
5) after completion to be cast 24 hours, form removal；
6) wall is conserved, is arranged.
It preferably, further include being carried out to non-bearing wall body before step 1) in the cast-in-place construction method of this non-load bearing wall
Surveying setting-out step.
Preferably, the cast-in-place construction method step 1 of this non-load bearing wall) in, spacing between constructional column no more than 4mm or
Person is not more than high 2 times of wall.
Preferably, the cast-in-place construction method step 3 of this non-load bearing wall) in, after non-bearing wall body template is according to first interior wall
The sequence of exterior wall is installed.
Preferably, the cast-in-place construction method step 3 of this non-load bearing wall) in, non-bearing wall body template is Steel-wood forming board, is
The modular shuttering element that processing customization is completed is designed and industrialized through regularization.
Preferably, the cast-in-place construction method step 4 of this non-load bearing wall) in, casting lightweight concrete uses pumping mode
It carries out, directly injects lightweight concrete inside template.It, can be complete square inside template after concrete is directly filled into template inside
Position is uniformly distributed, and is guaranteed that entire wall is homogeneous, and condense, expand, harden, is not needed to pour and smash, plug and pound or vibrate.
Preferably, the cast-in-place construction method step 5 of this non-load bearing wall) in, form removal is by interior wall after first exterior wall
Sequence is removed.
The beneficial effects of the present invention are:
The present invention is manufactured using construction waste into a kind of regenerated environment protecting lightweight concrete material, is matched using the lightweight concrete
The non-bearing wall body of assembled in situ formula branch module and cast-in-situ made of system has the characteristics that lightweight, high-strength, at low cost, has good
Economic, society and environmental benefit.
Compared with prior art, the present invention has the advantage that:
1, the cast-in-place construction of non-bearing wall body is realized.The present invention is configured to lightweight coagulation with regenerated environment protecting active material
Soil realizes the integral cast-in-situ construction of non-bearing wall body, reduces what traditional-handwork was built a wall with non-bearing wall body cast in place process
Labor intensity improves construction efficiency, reduces civilized construction cost.
2, meet the management requirement of safety in production civilized construction.It is different from traditional mode of building a wall, it is applied using wall is cast-in-place
Work technology does not need the construction materials such as brick, sand, cement in work progress, so, in entire work progress, it is not necessarily to operation
Place is generated without fugitive dust, so being more favorable for construction site safety construction management.
3, integrated, the disposable cast-in-place construction of wall, constructional column and preheating embedding line is realized.In cast-in-place construction process
In, the upper and lower conduit in wall, strong, weak electricity penetration pipe can carry out default fixation in advance, then by unified cast-in-place, realization wall
Body, constructional column, preheating embedding line integrated, disposable cast-in-place construction.Compared with traditional structure builds a wall mode, applying for wall is improved
Work efficiency rate and construction quality eliminate the damage because slotting to wall, eliminate because fluting preheating embedding line fugitive dust is to operating personnel
Bring health hazards.
4, the resource utilization of construction waste is realized, building cost is more controllable.With pushing away for Urbanization in China
Into the price of resource products necessarily can also be improved because of the raising of Urbanization Rate.In the present invention primary raw material of wall be through
It is harmless it is processed after construction waste, this undoubtedly greatly reduces production cost.
5, building sound insulation, insulation, Environmental Protection Level are improved, the quality of building is promoted.Concrete material of the invention
Material has the characteristics that lightweight, high-strength, so that wall (including exterior wall, interior wall) can have good sound insulation, insulation, environmental protection etc.
Advantage improves architecture quality, meets the needs of people are to architecture of high quality.
6, the shock resistance and safety of non-bearing wall body are improved.Lightweight concrete of the invention is in condensation hardening process
In, can generate certain expansion, this small expansion also make while guaranteeing the intensity of wall wall and column, beam, plate it
Between combine closely to form entirety.There is stronger shock resistance compared with traditional brick wall.
7, " hollowing " problem of traditional lightweight brick wall body is solved.Traditional form of construction work is that light-weight brick is built into wall
The cement mortar of 1.5-2cm is smeared on two sides again afterwards, but due to many originals such as the shrinking percentages and water imbibition difference of brick body and mortar
Cause, " hollowing " phenomenon of traditional wall is almost at " cancer " of wall quality.The disposable integral cast-in-situ of the present invention construct so that
Wall is inside and outside to be formed a unified entirety and handles without plastering, to fundamentally solve " hollowing " phenomenon of wall.
8, demand of the owner to non-bearing wall body Beautification design is met.Since exterior wall and interior wall are all using cast-in-place mode
It realizes, thus template can play the effect of wall Beautification design in wall is cast-in-place.Such as it can computer design decoration when construction
Pattern, quickly forms mirror pattern by 3D printing technique etc. on the inside of template, cast-in-place, the form removable that carries out wall with template
Afterwards, decorative pattern can reside in metope.The present invention can make owner participate in metope beautification, realize the decorative effect of " individual's customization ".
Specific embodiment
The contents of the present invention are described in further detail below by way of specific embodiment.Original used in embodiment
Material unless otherwise specified, can be obtained from routine business approach.
Embodiment 1
A kind of lightweight concrete, the raw material including following mass parts: 2500 parts of cement, 9000 construction wastes, 50 parts of oxidations
Calcium, 6 parts of fibers, 10 parts of water-reducing agents, 1 portion of foam stabilizer, 10 parts of air entraining agents, 2 parts of cellulose ethers, 15 parts of foaming agents, 15 parts of hydrogen peroxide,
12 parts of swelling agents, 10 parts of suspending agents, 4 parts of thickeners, 15 parts of calcium hydroxides, 250 parts of flyash, 3500 parts of water.
The preparation method of this lightweight concrete of this example, comprising the following steps:
1) raw material is weighed according to above-mentioned composition；
2) construction waste and calcium oxide are mixed evenly, 1200 parts of water is added, stand 3h, obtain pretreatment bone
Material；
3) aggregate, cement, fiber, flyash and 2300 parts of water will be pre-processed and 2min is mixed；Add water-reducing agent,
Foam stabilizer, air entraining agent, cellulose ether, foaming agent, swelling agent, suspending agent, thickener, calcium hydroxide are uniformly mixed；Then it is added
Hydrogen peroxide is mixed, obtains lightweight concrete.
In this example, cement used is 32.5 grades of ordinary portland cement；Partial size < 3mm of construction waste；Fiber is behaved
Make fiber；Water-reducing agent is poly carboxylic acid series water reducer；Foam stabilizer is silicone amide foam stabilizer；Air entraining agent is dodecyl benzene sulfonic acid
Sodium；Cellulose ether is hydroxypropyl methyl cellulose；Foaming agent is vegetable protein foaming agent；H in hydrogen peroxide2O2Concentration be
30wt%；Swelling agent is UEA swelling agent；Suspending agent is precipitated calcium carbonate；Thickener is polyacrylamide.
Embodiment 2
A kind of lightweight concrete, the raw material including following mass parts: 2200 parts of cement, 8800 construction wastes, 50 parts of oxidations
Calcium, 5 parts of fibers, 9 parts of water-reducing agents, 1 portion of foam stabilizer, 15 parts of air entraining agents, 2 parts of cellulose ethers, 10 parts of foaming agents, 15 parts of hydrogen peroxide,
16 parts of swelling agents, 12 parts of suspending agents, 4 parts of thickeners, 15 parts of calcium hydroxides, 300 parts of flyash, 3300 parts of water.
The preparation method of this lightweight concrete of this example, comprising the following steps:
1) raw material is weighed according to above-mentioned composition；
2) construction waste and calcium oxide are mixed evenly, 1300 parts of water is added, stand 3h, obtain pretreatment bone
Material；
3) aggregate, cement, fiber, flyash and 2000 parts of water will be pre-processed and 2min is mixed；Add water-reducing agent,
Foam stabilizer, air entraining agent, cellulose ether, foaming agent, swelling agent, suspending agent, thickener, calcium hydroxide are uniformly mixed；Then it is added
Hydrogen peroxide is mixed, obtains lightweight concrete.
Raw material used in this example is identical as embodiment 1.
Embodiment 3
A kind of lightweight concrete, the raw material including following mass parts: 2800 parts of cement, 11000 construction wastes, 55 parts of oxidations
Calcium, 6 parts of fibers, 10 parts of water-reducing agents, 2 portions of foam stabilizers, 10 parts of air entraining agents, 2 parts of cellulose ethers, 15 parts of foaming agents, 15 parts of hydrogen peroxide,
15 parts of swelling agents, 10 parts of suspending agents, 4 parts of thickeners, 15 parts of calcium hydroxides, 250 parts of flyash, 3400 parts of water.
The preparation method of this lightweight concrete of this example, comprising the following steps:
1) raw material is weighed according to above-mentioned composition；
2) construction waste and calcium oxide are mixed evenly, 1000 parts of water is added, stand 3h, obtain pretreatment bone
Material；
3) aggregate, cement, fiber, flyash and 2400 parts of water will be pre-processed and 2min is mixed；Add water-reducing agent,
Foam stabilizer, air entraining agent, cellulose ether, foaming agent, swelling agent, suspending agent, thickener, calcium hydroxide are uniformly mixed；Then it is added
Hydrogen peroxide is mixed, obtains lightweight concrete.
The performance of lightweight concrete material obtained by Examples 1 to 3 is as shown in table 1.The method of inspection is this field public affairs
The detection method known.
The lightweight concrete material performance of 1 Examples 1 to 3 of table
| Performance indicator | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Bulk density/kg/m3 | 1125 | 1264 | 1430 |
| Compression strength/MPa | 5.5 | 6.8 | 7.1 |
| Thermal coefficient/W/ (mK) | 0.15 | 0.165 | 0.17 |
| Water absorption rate/% | 3 | 3 | 3 |
| Coefficient of softing | 0.92 | 0.88 | 0.95 |
| Hanging force/N | 1430 | 1520 | 1550 |
| Fire endurance/h | 2 | 2.5 | 2.5 |
| Air-borne sound weighted transmission loss/dB | 48 | 50 | 49 |
As known from Table 1, the present invention is prepared lightweight concrete material compression strength >=5MPa, and thermal coefficient≤
0.177W/ (mK), water absorption rate≤5%, coefficient of softing >=0.85, hanging force >=1300N, fire endurance >=2h, air-borne sound meter
Weigh oise insulation factor >=47dB.
Non-load bearing wall cast-in-place construction is carried out using lightweight concrete material of the invention, construction method is as follows:
S1: surveying setting-out.Including each wall position in ground library masonry surveying setting-out, main body bottom wall surveying setting-out, floor
Elevation control line pilot measurement etc. in the pilot measurement set, floor.
S2: in non-load bearing wall mounting structure column.In order to guarantee and improve the anti-seismic performance of non-load bearing wall (filling wall) wall
And safety, during non-bearing wall body cast-in-place construction, reference and foundation " Code for design of masonry strucres " (GB 50003-
2011) with the standard and requirement of " seismic design provision in building code " (GB 50011-2010), constructional column is set, and constructional column and
Non-load bearing wall carries out integrated, disposable cast-in-place molding, so that constructional column and non-load bearing wall is become organic whole, to enhance wall
Shock resistance, improve the anti-seismic performance and level of security of building.
Constructional column be subject to architectural working drawing mark position.As do not marked on architectural working drawing, constructional column should according to
Lower principle setting, and meet " Code for design of masonry strucres " (GB 50003-2011) and " seismic design provision in building code " (GB
Standard and requirement 50011-2010): the 1. two sides at hole of the width greater than 2m；2. length is more than the two of the independent wall of 2.5m
End；3. wall corner and vertical wall and cross wall intersection are filled in house；4. when wall thickness is greater than 120mm, the long nothing more than 5m of wall
When intermediate cross wall or column drawknot, constructional column should be set at position among wall；When wall thickness is not more than 120mm, wall length is more than
4m and without intermediate cross wall or when column drawknot, constructional column should be set at position among wall；Spacing between constructional column must not be big
In 4m or it is not greater than high 2 times of wall.
Constructional column is configured according to code requirement, constructional column framework of steel reinforcement is prefabricated, stirrup binding, vertical muscle upper underbeam it
Between overlap joint etc., the prefabricated and setting method that can refer to constructional column of building a wall carries out.
S3: pre-buried water pipe, electric wire.Pre-buried pipeline should be arranged in inside wall, when preventing demoulding, pipe in concrete occur
Exposed phenomenon.
S4: installation non-bearing wall body template.Non-bearing wall body template is Steel-wood forming board, is designed and industrializes through regularization
The modular shuttering element that processing customization is completed.The installation of template is installed according to the sequence of first interior wall, rear exterior wall, is tentatively installed
The adjustment of vertical and horizontal absolute altitude should be carried out afterwards.1) construction floor unwrapping wire, positioning, left and right facade unwrapping wire, top surface unwrapping wire, positioning,
Control line is put outside wall.2) installation door-window opening mould plate and original structure wall column should plant reinforcing bar (executing by construction standards).Installation → side
Template → wear Screw arbor with nut at both-ends casing and fixation → installation other side wall form → installation Screw arbor with nut at both-ends and back cord → installation diagonal brace
And earth anchor → correction is reinforced → handles preliminary examination.3) when carrying out screw rod through walls fastening, it should be noted that must tight, jail at form joint
Gu it is reliable, prevent dislocation spillage phenomenon.4) reserved wire box, pipeline hole box must be reinforced tightly, guarantee that hole wire box is flat
Histogram is just.
S5: above-mentioned lightweight concrete is poured into template.It pours and is carried out using pumping mode, directly infuse the concrete
Enter to inside template.After the concrete is directly filled into template inside, it Omnibearing even can be distributed, guarantee entire inside template
Wall is homogeneous, and condenses, expands, hardens, and does not need to pour and smashes, plugs and pounds or vibrate.
S6: form removal.After the completion of primary concreting, defined concrete strength can reach after 24 hours.It can carry out mould
The dismounting of plate.Form removable sequence is with template erection sequence on the contrary, first exterior wall, rear interior wall, first remove exterior wall outboard template, then tear open
Except inner side template, first template, rear angle mould.
S7: conserving wall, arranges.After form removable, metope conscientiously should be checked and be arranged.Due to this
The superiority of invention lightweight concrete material, using the cast-in-place non-load bearing wall of the material be not in metope hollowing, wall cracking,
Phenomena such as metope plucking, metope waterproof performance are also fine.But when metope inspection arranges, the flatness of metope should be carried out certainly
It looks into.Provided according to national standard specification: degree of plainness for wall surface error must not exceed 3mm.After form removable, because screw rod through walls is removed
In the hole that metope leaves, waterproof mortar should be used tightly to block, smooth out；If because of surface of wall or corner angle caused by form removable
It is impaired, it should conscientiously be repaired with waterproof mortar in time perfect；Dregs, the waste material on ground are cleaned, ground clean hygiene is kept.Template is torn open
After removing, architectural working drawing is shone in reply, checks in earnest constructional column, to wall pre-embedded pipeline, reserved casing, reserved hole
It is checked with built-in fitting etc., adhesive tape, the dregs for docking wire box and box mouth are cleared up etc..
In conclusion the present invention has good economic, society and environmental benefit, it is described as follows:
One, economic benefit
1, non-lbearing wall material cost is reduced
Since the main raw material(s) of lightweight concrete of the present invention is lower production costs in construction waste.With sintered clay
Brick (common brick) is compared with autoclave aerated concrete building block, and the present invention can reduce by 10% of 5% or so cost respectively.Therefore, it adopts
It can obviously reduce building cost with lightweight concrete of the present invention and its construction of cast-in-place construction technique.
2, reduce own wt and the investment of building
Concrete of the invention is a kind of light-concrete structure material, and bulk density is lighter.It is calculated by bulk density, this
Invention lightweight concrete dry density only has the 30%~35% of sintered clay brick bulk density.Since building total weight is reduced, thus
The design of building load-carrying members can be optimized, the materials'use and own wt of load-carrying members are reduced, to reduce building
Investment.
3, the labor cost of non-load bearing wall construction is reduced
Non-load bearing wall provides lightweight concrete cast-in-place form of construction work using the present invention, greatly improves speed of application,
Shorten the construction period, it is no longer necessary to use traditional masonry worker, construction personnel is also accordingly reduced.Pass through 100m2Non-bearing
Known to the cast-in-place test of wall show house: compared with the mode of building a wall of sintered clay brick and autoclave aerated concrete building block, using this hair
Bright cast-in-place construction mode can reduce labor cost 5% to 8%.
4, " hollowing " problem of traditional lightweight brick wall body is solved
Traditional form of construction work is to smear the cement mortar of 1.5-2cm on wall two sides after light-weight brick to be built into wall,
But due to the shrinking percentage and water imbibition difference of brick body and mortar etc. are many, " hollowing " phenomenon of traditional wall is almost at wall
" cancer " of weight.Disposable integral cast-in-situ construction of the invention, so that wall is inside and outside to form unified an entirety and nothing
Need to plaster processing, to fundamentally solve " hollowing " phenomenon of wall.
Two, social benefit
1, the development of construction material and the progress of building construction technology have effectively been pushed
Lightweight concrete and its cast in place technique of the invention is changed using sintered clay brick and lightweight aggregate concrete building block
Tradition build a wall mode, greatly improve construction quality, speed of application and the operating efficiency of non-load bearing wall, save engineering at
This, reduces labor intensity, and non-load bearing wall construction is made to walk to step on a new stage.
2, building energy conservation level is improved well
Lightweight concrete of the invention has good sound insulation, heat-insulated, heat insulation function.The material is for external wall, interior
Wall construction, can effectively improve the sound insulation of building, heat-insulated, thermal insulation property, so that the energy-saving horizontal of building can be improved.
3, the safety construction for advancing building trade increases building aseismicity ability and safety
Lightweight concrete of the invention is directly injected into template using unique cast in place technique, and construction site is both without brick sand or nothing
Cement avoids pollution of the fugitive dust to environment.The integrated cast in place process of lower bulk density combination wall and constructional column, greatly increases
The strong anti-seismic performance of wall, keeps building safer.
Three, environmental benefit
With urbanization fast development, construction waste is largely generated.Most cities, the construction of construction waste treatment facility are stagnant
Afterwards, construction waste private, which is drawn, disorderly seriously affects town and country living environment and safe operation.Construction waste resource utilization, which has become, to be worked as
The vital task of preceding city management.The present invention realizes right-about of the building castoff from waste material to resource, explores one
The road of effective construction waste harmless treatment and resource utilization, to solve the problems, such as that " waste material besieged city " has supplied one
New solution direction.
Claims (10)
1. a kind of lightweight concrete, it is characterised in that: the raw material including following mass parts: 2000~3000 parts of cement, 8000~
12000 construction wastes, 40~60 parts of calcium oxide, 5~8 parts of fibers, 8~12 parts of water-reducing agents, 0.8~2.5 part of foam stabilizer, 8~18
Part air entraining agent, 1.5~3 parts of cellulose ethers, 10~20 parts of foaming agents, 8~16 parts of hydrogen peroxide, 10~20 parts of swelling agents, 8~14 parts
Suspending agent, 3~5 parts of thickeners, 10~18 parts of calcium hydroxides, 200~350 parts of flyash, 2200~3600 parts of water；The building
Waste material includes one of discarded concrete, discarded brick and tile, discarded stone grain, waste gypsum, waste mortar, waste residue soil or a variety of.
2. a kind of lightweight concrete according to claim 1, it is characterised in that: the water-reducing agent is selected from lignosulfonates
Class water-reducing agent, naphthalene water reducer, melamine system water reducer, sulfamate based water reducer, fatty acid series water-reducing agent, polycarboxylic acids
At least one of based water reducer.
3. a kind of lightweight concrete according to claim 1, it is characterised in that: the foam stabilizer is silicone amide foam stabilizing
Agent.
4. a kind of lightweight concrete according to claim 1, it is characterised in that: the air entraining agent is selected from rosin tree lipid and draws
At least one of gas agent, alkyl sulfonic acid class air entraining agent, fatty alcohol sulfonate class air entraining agent, petroleum sulphur hydrochloric acid air entraining agent.
5. a kind of lightweight concrete according to claim 1, it is characterised in that: the foaming agent foams selected from metallic aluminium powder
At least one of agent, vegetable protein foaming agent, animal protein foaming agent, resin soaps foaming agent.
6. a kind of lightweight concrete according to claim 1, it is characterised in that: it is swollen that the swelling agent is selected from calcium sulphoaluminate class
Swollen dose, at least one of calcium oxide expansion agents.
7. a kind of lightweight concrete according to claim 1, it is characterised in that: the suspending agent is selected from silicon powder, lightweight carbon
At least one of sour calcium, bentonite, attapulgite, talcum powder.
8. a kind of lightweight concrete according to claim 1, it is characterised in that: the thickener be selected from polyacrylamide,
At least one of Sodium Polyacrylate, polyvinyl alcohol.
9. a kind of preparation method of lightweight concrete, it is characterised in that: the following steps are included:
1) composition according to any one of claims 1 to 8 weighs raw material；
2) construction waste and calcium oxide are uniformly mixed, the water of 1000~1500 mass parts is added, stood, obtain pretreatment bone
Material；
3) water for pre-processing aggregate, cement, fiber, flyash and surplus is uniformly mixed；It adds water-reducing agent, foam stabilizer, draw
Gas agent, cellulose ether, foaming agent, swelling agent, suspending agent, thickener, calcium hydroxide are uniformly mixed；Then hydrogen peroxide is added, mixes
Stirring is closed, lightweight concrete is obtained.
10. a kind of construction method that non-load bearing wall is cast-in-place, it is characterised in that: the following steps are included:
1) in scheduled non-load bearing wall position mounting structure column；
2) pre-buried water pipe, electric wire；
3) non-bearing wall body template is installed；
4) lightweight concrete according to any one of claims 1 to 8 is poured into template；
5) after completion to be cast 24 hours, form removal；
6) wall is conserved, is arranged.
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Application publication date: 20190802 |