CN109678435A - Utilize the GRC waistcloth wallboard and preparation method thereof of low-quality recycled fine aggregate production - Google Patents
Utilize the GRC waistcloth wallboard and preparation method thereof of low-quality recycled fine aggregate production Download PDFInfo
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- CN109678435A CN109678435A CN201811502423.8A CN201811502423A CN109678435A CN 109678435 A CN109678435 A CN 109678435A CN 201811502423 A CN201811502423 A CN 201811502423A CN 109678435 A CN109678435 A CN 109678435A
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- fine aggregate
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- recycled fine
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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
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- 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
- E04B2/88—Curtain 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
- 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
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- 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)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Finishing Walls (AREA)
Abstract
The present invention relates to a kind of GRC waistcloth wallboard and preparation method thereof using the production of low-quality recycled fine aggregate, which includes the component of following mass parts ratio: 400-800 parts of low-alkalinity sulphoaluminate cement, 1000-1400 parts of recycled fine aggregate, 10-40 parts of polycarboxylate water-reducer, 2-4 parts of alkali-resistant glass fibre.GRC waistcloth wallboard and preparation method thereof using the production of low-quality recycled fine aggregate of the invention, which passes through, makes GRC waistcloth wallboard using low-quality recycled fine aggregate, expand the application range of low-quality recycled fine aggregate, the utilization rate of building demolition waste is improved, there is good environmental benefit, economic benefit and social benefit.
Description
Technical field
The present invention relates to technical field of buildings, and in particular to a kind of GRC decoration using the production of low-quality recycled fine aggregate
Curtain wall panel and preparation method thereof.
Background technique
With the continuous improvement of China's level of urbanization, city size is constantly expanded, and the removal and transformation in old city make
Obtain the building removal area sustainable growth that China goes over 10 years.It is flat that China's building demolition area in 2017 has reached 14.36 hundred million
Square rice.According to statistics, Old building remove the building waste unit area output coefficient generated be 906.7~1335.5 kilograms/it is flat
Square rice, the building waste amount that conservative estimation China's building demolition in 2017 generates in the process is up to 1,600,000,000 tons.Building waste is through broken
In the product of screening, only 9% high-quality aggregate and 6% common quality aggregate may be directly applied to production pitch coagulation
In soil, normal concrete, remaining 85% low quality aggregate is recycled since porosity is high, water imbibition is big, intensity is low by very big
Limitation.
Summary of the invention
The object of the present invention is to provide a kind of GRC waistcloth wallboard using the production of low-quality recycled fine aggregate and its preparations
Method solves the problems, such as that the low-quality fine aggregate in existing building rubbish is not fully and rationally used.
The technical proposal for solving the technical problem of the invention is: a kind of to be made using low-quality recycled fine aggregate
GRC waistcloth wallboard, the component comprising following mass parts ratio: 400-800 parts of low-alkalinity sulphoaluminate cement, recycled fine aggregate
1000-1400 parts, 10-40 parts of polycarboxylate water-reducer, 2-4 parts of alkali-resistant glass fibre.
In GRC waistcloth wallboard of the invention, the component comprising following mass fraction: low-alkalinity sulphoaluminate cement
550-650 parts, 1150-1300 parts of recycled fine aggregate, 20-30 parts of polycarboxylate water-reducer, 2.5-3 parts of alkali-resistant glass fibre.
In GRC waistcloth wallboard of the invention, the recycled fine aggregate is building demolition waste by broken, screening
The fine aggregate less than 2mm afterwards passes through the recycled fine aggregate that pretreatment obtains.
In GRC waistcloth wallboard of the invention, pretreatment refers to: the fine aggregate less than 2mm is dry, it is subsequently poured into and mixes
There is soaking and stirring in the water of sulfamate based water reducer, then produces placement ageing to moisture content and stablize in 15%~25% range
It is interior.
It is in GRC waistcloth wallboard of the invention, the fine aggregate less than 2mm is dry to moisture content≤0.5%；Mixed with ammonia
The concentration of sulfamate based water reducer in the water of base sulfonate based water reducer is 0.3%~0.6%；The time of soaking and stirring
For 3-10min；The time of ageing is 1 day or more.
The present invention also provides it is above-mentioned using low-quality recycled fine aggregate production GRC waistcloth wallboard preparation method,
It is 400-800 parts of low-alkalinity sulphoaluminate cement, 1000-1400 parts of recycled fine aggregate, 10-40 parts in mass parts ratio
The water that mass parts ratio is 100-200 parts is added in the component of polycarboxylate water-reducer, 2-4 parts of alkali-resistant glass fibre, mixing is stirred
It mixes to uniform state, is fitted into mold, vibration moulding demoulds after maintenance and GRC waistcloth wallboard is made.
In the preparation process in accordance with the present invention, the time of maintenance is 4-24h.
In the preparation process in accordance with the present invention, the recycled fine aggregate is building demolition waste after broken, screening
Fine aggregate less than 2mm passes through the recycled fine aggregate that pretreatment obtains.
In the preparation process in accordance with the present invention, pretreatment refers to: the fine aggregate less than 2mm is dry, it is subsequently poured into mixed with ammonia
Soaking and stirring in the water of base sulfonate based water reducer, then produce placement ageing to moisture content and stablize in 15%~25% range.
In the preparation process in accordance with the present invention, the fine aggregate less than 2mm is dry to moisture content≤0.5%；Mixed with amino sulphur
The concentration of sulfamate based water reducer in the water of hydrochlorate based water reducer is 0.3%~0.6%；The time of soaking and stirring is 3-
10min；The time of ageing is 1 day or more.
Implement the GRC waistcloth wallboard and preparation method thereof of the invention using the production of low-quality recycled fine aggregate, has
Below the utility model has the advantages that the GRC waistcloth wallboard and preparation method thereof of the invention using the production of low-quality recycled fine aggregate passes through
GRC waistcloth wallboard is made using low-quality recycled fine aggregate, the application range of low-quality recycled fine aggregate is expanded, improves
The utilization rate of building demolition waste has good environmental benefit, economic benefit and social benefit.
Specific embodiment
Below with reference to embodiment, to the GRC waistcloth wallboard of the invention using the production of low-quality recycled fine aggregate and its
Preparation method is described further:
The present invention relates to a kind of GRC waistcloth wallboards made using low-quality recycled fine aggregate, and it includes following quality
The component of portion rate: 400-800 parts of low-alkalinity sulphoaluminate cement, 1000-1400 parts of recycled fine aggregate, polycarboxylate water-reducer
10-40 parts, 2-4 parts of alkali-resistant glass fibre.
100-200 parts of water is added in the component of above-mentioned mass parts ratio and mixes to uniform state, i.e., by 100-
200 parts of water, 400-800 parts of low-alkalinity sulphoaluminate cement, 1000-1400 parts of recycled fine aggregate, 10-40 parts of poly- carboxylic
Sour water-reducing agent, 2-4 parts of alkali-resistant glass fibre mixes to uniform state according to mass parts ratio, is fitted into mold, vibration
Molding demoulds obtained GRC waistcloth wallboard after conserving 4-24h.
Preferably, GRC waistcloth wallboard includes the component of following mass parts ratio: low-alkalinity sulphoaluminate cement 550-
650 parts, 1150-1300 parts of recycled fine aggregate, 20-30 parts of polycarboxylate water-reducer, 2.5-3 parts of alkali-resistant glass fibre.
130-170 parts of water is added in the component of preferred mass portion rate and mixes to uniform state, i.e., by 130-
170 parts of water, 550-650 parts of low-alkalinity sulphoaluminate cement, 1150-1300 parts of recycled fine aggregate, 20-30 parts of poly- carboxylic
Sour water-reducing agent, 2.5-3 parts of alkali-resistant glass fibre mixes to uniform state according to mass parts ratio, is fitted into mold, vibration
Dynamic molding demoulds obtained GRC waistcloth wallboard after conserving 4-24h.
It should be noted that low-alkalinity sulphoaluminate cement can be the water of the different models grades such as 32.5,42.5,52.5
Mud.
Wherein, recycled fine aggregate is that building demolition waste passes through in advance by the fine aggregate broken, after screening less than 2mm
Handle obtained recycled fine aggregate.That is, building demolition waste obtains the thin bone less than 2mm after broken, screening
Material, obtains recycled fine aggregate using pretreatment.
Pretreatment refers to: the fine aggregate less than 2mm is dry to moisture content≤0.5%, be subsequently poured into mixed with 0.3%~
Soaking and stirring 3-10min in the water of 0.6% sulfamate based water reducer, then produce to the placements such as middle roll-over be aged 1 day with
Stablize in 15%~25% range up to moisture content, it is preferably stable 18%.
It should be noted that the moisture content in " fine aggregate less than 2mm is dry to moisture content≤0.5% " refers to often
Water content≤0.5g of the fine aggregate less than 2mm of 100g.Moisture content in " moisture content is stablized in 15%~25% range "
Refer to the water content in the recycled fine aggregate of every 100g within the scope of 15g~25g." mixed with 0.3%~0.6% sulfamic acid
In the water of salt based water reducer " refer to sulfamate based water reducer in every 100ml water containing 0.3g~0.6g.By by thin bone
Material is immersed mixed in the water of additive, so that it is full of the moisture content containing high concentration additive in the open pores in aggregate, so that
These low-quality recycled aggregates, will not be due to concentration difference, so that the additive in mixing water is opened to aggregate during mix
It spreads in oral pore gap, can gradually be spread instead into mixing water, to reduce the slump-loss of concrete.
The bulk density of the GRC waistcloth wallboard prepared through the above way is 1700~2200kg/m3；GRC waistcloth
Wallboard compression strength is 40~80MPa；The beaming resistance limit intensity of GRC waistcloth wallboard is 8~14MPa；Ultimate tensile intensity is 3
~7MPa.
The present invention makes GRC waistcloth wallboard by certain pretreating process, using low-quality recycled fine aggregate, is low
The application of quality recycled fine aggregate provides a new direction.
GRC waistcloth wallboard mainly uses 2mm fine aggregate below, according to the number wherein containing clay brick clast,
Water absorption rate about fluctuates in 10%~25% larger range, has larger impact to the workability of GRC.Furthermore in the hardening of GRC
In the process, the moisture of aggregate hole is inhaled into when mix since slurry aggregate Interface can be bled back to, resistance to compression, the tension for influencing GRC are strong
Degree.It, can be to avoid the bring water absorption rate change due to fine aggregate quality fluctuation but after 2mm fine aggregate below is by pretreatment
Change, guarantees the workability of GRC, simultaneously because sulfamate based water reducer has been adsorbed in the hole of recycled fine aggregate in advance, it can
To avoid the concentration difference of moisture in aggregate hole and GRC slurry, bleeding back for pore water is reduced, improves the glue of slurry aggregate Interface
Than rising condition, to improve the compression strength and tensile strength of GRC.
The present invention is more specifically described in detail combined with specific embodiments below, but embodiments of the present invention are unlimited
In this.
(1) embodiment 1-3 material fiting ratio is shown in Table 1.
Table 1:GRC decorative curtain wall board raw material proportion
(2) raw material is weighed according to said ratio, mixes to uniform state, is fitted into mold, vibration moulding, after maintenance
It demoulds and GRC waistcloth wallboard is made；
Wherein, the pretreatment of the recycled fine aggregate in embodiment 1-3 is as follows: the fine aggregate less than 2mm is dry to aqueous
Rate≤0.5% is subsequently poured into soaking and stirring 8min in the water mixed with 0.5% sulfamate based water reducer, then produces into
The placements such as roll-over are aged 1 day to stablize in 15%~25% range up to moisture content；
The pretreatment of recycled fine aggregate in embodiment 4-5 is as follows: by the fine aggregate less than 2mm it is dry to moisture content≤
0.5%, it is subsequently poured into soaking and stirring 3min in the water mixed with 0.3% sulfamate based water reducer, then produce to middle roll-over
Equal placements are aged 1 day to stablize in 15%~25% range up to moisture content；
The pretreatment of recycled fine aggregate in embodiment 6-7 is as follows: by the fine aggregate less than 2mm it is dry to moisture content≤
0.5%, it is subsequently poured into soaking and stirring 10min in the water mixed with 0.6% sulfamate based water reducer, then produce to middle roll-over
Equal placements are aged 1 day to stablize in 15%~25% range up to moisture content；
(3) performance indicator of GRC waistcloth wallboard is detected, the results are shown in Table 2.
Table 2:GRC waistcloth wallboard performance indicator testing result
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
Within all these improvement or transformation should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of GRC waistcloth wallboard made using low-quality recycled fine aggregate, which is characterized in that include following mass fraction
The component of ratio: 400-800 parts of low-alkalinity sulphoaluminate cement, 1000-1400 parts of recycled fine aggregate, polycarboxylate water-reducer 10-40
Part, 2-4 parts of alkali-resistant glass fibre.
2. GRC waistcloth wallboard according to claim 1, which is characterized in that the component comprising following mass fraction: low alkali
Sulphate aluminium cement 550-650 parts of degree, 1150-1300 parts of recycled fine aggregate, 20-30 parts of polycarboxylate water-reducer, alkali-proof glass are fine
2.5-3 parts of dimension.
3. GRC waistcloth wallboard according to claim 1 or 2, which is characterized in that the recycled fine aggregate is building demolition
Waste passes through the recycled fine aggregate that pretreatment obtains by the fine aggregate broken, after screening less than 2mm.
4. GRC waistcloth wallboard according to claim 3, which is characterized in that pretreatment refers to: the thin bone of 2mm will be less than
Expect drying, be subsequently poured into soaking and stirring in the water mixed with sulfamate based water reducer, then produce placement ageing it is steady to moisture content
It is scheduled in 15%~25% range.
5. GRC waistcloth wallboard according to claim 4, which is characterized in that the fine aggregate less than 2mm is dry to aqueous
Rate≤0.5%；Concentration mixed with the sulfamate based water reducer in the water of sulfamate based water reducer is 0.3%~
0.6%；The time of soaking and stirring is 3-10min；The time of ageing is 1 day or more.
6. a kind of preparation method of the GRC waistcloth wallboard using the production of low-quality recycled fine aggregate, which is characterized in that in quality
Portion rate is 400-800 parts of low-alkalinity sulphoaluminate cement, 1000-1400 parts of recycled fine aggregate, 10-40 parts of polycarboxylic acids
The water that mass parts ratio is 100-200 parts is added in the component of water-reducing agent, 2-4 parts of alkali-resistant glass fibre, mixes to
Even state, is fitted into mold, vibration moulding, demoulds after maintenance and GRC waistcloth wallboard is made.
7. preparation method according to claim 6, which is characterized in that the time of maintenance is 4-24h.
8. preparation method according to claim 6, which is characterized in that the recycled fine aggregate is building demolition waste warp
It crosses the fine aggregate broken, after screening less than 2mm and passes through the recycled fine aggregate that pretreatment obtains.
9. preparation method according to claim 8, which is characterized in that pretreatment refers to: the fine aggregate less than 2mm is done
It is dry, it is subsequently poured into soaking and stirring in the water mixed with sulfamate based water reducer, then produce placement ageing to moisture content and stablize
In 15%~25% range.
10. preparation method according to claim 9, which is characterized in that by the fine aggregate less than 2mm it is dry to moisture content≤
0.5%；Concentration mixed with the sulfamate based water reducer in the water of sulfamate based water reducer is 0.3%~0.6%；Leaching
The time of bubble stirring is 3-10min；The time of ageing is 1 day or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811502423.8A CN109678435B (en) | 2018-12-10 | 2018-12-10 | GRC decorative curtain wall board made of low-quality recycled fine aggregate and preparation method thereof |
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|---|---|---|---|
| CN201811502423.8A CN109678435B (en) | 2018-12-10 | 2018-12-10 | GRC decorative curtain wall board made of low-quality recycled fine aggregate and preparation method thereof |
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| CN109678435B CN109678435B (en) | 2021-07-06 |
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Cited By (2)
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| CN110563414A (en) * | 2019-10-28 | 2019-12-13 | 中国十七冶集团有限公司 | Preparation and construction method of separated concrete for CCW heat-preservation curtain wall |
| CN111548104A (en) * | 2020-06-01 | 2020-08-18 | 中国建材检验认证集团北京天誉有限公司 | Low-water-absorption regenerative GRC material prepared from high belite sulphoaluminate cement |
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| CN110563414B (en) * | 2019-10-28 | 2022-01-25 | 中国十七冶集团有限公司 | Preparation and construction method of separated concrete for CCW heat-preservation curtain wall |
| CN111548104A (en) * | 2020-06-01 | 2020-08-18 | 中国建材检验认证集团北京天誉有限公司 | Low-water-absorption regenerative GRC material prepared from high belite sulphoaluminate cement |
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| CN109678435B (en) | 2021-07-06 |
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