CN114940601A - Building waste material-based concrete for filler wall constructional column and preparation method thereof - Google Patents
Building waste material-based concrete for filler wall constructional column and preparation method thereof Download PDFInfo
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- CN114940601A CN114940601A CN202210060779.0A CN202210060779A CN114940601A CN 114940601 A CN114940601 A CN 114940601A CN 202210060779 A CN202210060779 A CN 202210060779A CN 114940601 A CN114940601 A CN 114940601A
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of C04B28/04, in particular to building waste material base concrete for a filler wall structural column and a preparation method thereof, which are high in strength and prepared by adopting 350 parts of waste concrete blocks, 320 parts of waste stone materials, 300 parts of cement, 120 parts of mineral admixture, 180 parts of river sand, 400 parts of admixture and 180 parts of water 170, the concrete with good workability has low production cost, high later strength of the concrete and good working performance of newly mixed concrete, avoids the problem of difficult construction caused by over quick collapse loss of the concrete, through the four-stage screening process, the waste concrete blocks and the waste stone materials are fully utilized after being treated and screened, so that the resource recycling is realized, the method is particularly suitable for large-scale industrial application of the filler wall constructional column, and the method has important significance for realizing the resource utilization of the construction wastes and improving the economic benefit.
Description
Technical Field
The invention relates to the field of C04B28/04, in particular to building waste material-based concrete for a filled wall constructional column and a preparation method thereof.
Background
The concrete has the advantages of rich raw materials, low price, simple preparation, good moldability, good durability and low maintenance cost, but the raw materials such as stones, cement and the like adopted in the prior art have huge energy consumption for mining the mountain and are not beneficial to sustainable development, and on the other hand, the mass use of the cement can cause pollution and damage to the natural environment.
At present, the development of novel recycled materials is vigorously carried out, functional concrete and products thereof are vigorously developed, and effective resource recycling of waste concrete blocks and waste stone materials of buildings is realized, so that the novel recycled materials become strategic targets urgently needed to be realized in the industry. Chinese patent CN109160790 discloses a pervious concrete and a preparation method thereof, which mainly uses construction waste including waste concrete blocks, waste bricks and waste stone as raw materials, and provides a concrete with high water permeability by matching with broken stones, silica fume, a water reducing agent and water, but only adopts coarse aggregate with single grain size fraction, and cannot meet the requirement of concrete strength in practical application of a filler wall constructional column. And the mass ratio of the raw materials is (5-10): (5-10): and (10-15) the waste concrete blocks, waste bricks and waste stones are easy to cause rapid concrete collapse, and the structural performance of the concrete cannot be guaranteed.
The building waste material base concrete is high in strength and good in workability, low in production cost, high in later strength, good in working performance of newly mixed concrete, capable of avoiding the problem that construction is difficult due to too fast collapse loss of the concrete, capable of recycling building waste materials, namely the waste concrete and waste stone materials, especially suitable for large-scale industrial application of the filled wall constructional column, and important for realizing resource utilization of building waste and improving economic benefits.
Disclosure of Invention
In order to solve the above problems, in one aspect, the present invention provides a building waste-based concrete for a infilled wall constructional column, which is prepared from at least: 350 parts of waste concrete blocks, 320 parts of waste stone, 200 parts of cement, 180 parts of mineral admixture, 400 parts of river sand, 4-6 parts of admixture and 180 parts of water 170.
As a preferred technical scheme, the mineral admixture at least comprises mineral powderLimestone powder and fly ash; preferably, the mineral admixture comprises 70-90 parts by weight of mineral powder, 30-50 parts by weight of limestone powder and 20-40 parts by weight of fly ash; preferably, the mass ratio of the mineral powder, the limestone powder and the fly ash is (75-85): (40-50): (20-30), the mass ratio of (75-85) is adopted in the application: (40-50): (20-30) the mineral admixture effectively increases the later strength of the concrete, improves the working performance of the newly mixed concrete, reduces the cement consumption, reduces the production cost and reduces the temperature rise of the concrete. Preferably, the fineness of the limestone powder is 300-500m 2 (iv) kg; preferably, the limestone powder comprises coarse limestone powder, fine limestone powder and ultrafine limestone powder, and the mass ratio of the coarse limestone powder to the fine limestone powder to the ultrafine limestone powder is (1-3): (0.5-1): (1.2-1.8); the fineness of the limestone coarse powder is 300m 2 Per kg, the fineness of the limestone coarse powder is 400m 2 Per kg, the fineness of limestone ultrafine powder is 500m 2 In terms of/kg. In the process of exploration, the application discovers that when the mass ratio (1-3): (0.5-1): (1.2-1.8), when the limestone coarse powder, the limestone fine powder and the limestone ultrafine powder are mixed with the mineral powder and the fly ash, the cohesiveness and the water retention of a concrete mixture are effectively improved, large pores in concrete are reduced, a concrete pore structure is optimized, the compactness of the concrete structure is increased, the frost resistance, the impermeability and the sulfate erosion resistance of the provided concrete are improved, the durability of the concrete is improved, the workability is good, the slump loss of the concrete is reduced, and the provided concrete meets the use requirements of a filling wall constructional column.
As a preferable technical scheme, the admixture is a water reducing agent, and the water reducing agent is at least one selected from a polycarboxylic acid water reducing agent, a melamine water reducing agent and a naphthalene water reducing agent; preferably, the water reducing agent is a TS-JS slow-setting type polycarboxylic acid high-efficiency water reducing agent, the workability and the fluidity of a mixture are effectively improved, the dispersibility of cement is improved, and the durability of concrete is improved.
The invention also provides a preparation method of the building waste material-based concrete, which at least comprises the following steps:
(1) pretreating waste concrete blocks and waste stone materials;
(2) mixing the pretreated waste concrete blocks and waste stones to obtain a building waste material mixture;
(3) and (3) carrying out four-stage screening on the building waste mixture obtained in the step (2) to obtain a regenerated building mixture with the thickness of 20-40mm, 10-20mm, 5-10mm and 0-5 mm.
(4) And uniformly stirring the screened recycled building mixture, cement, mineral admixture, river sand, admixture and water by a mortar stirrer matched with a stirring station.
As a preferred technical solution, the pretreatment in the step (1) is specifically: screening the waste concrete blocks and the waste stone respectively through a screening device with the aperture of 3-5mm, and removing small-size impurities in the waste concrete blocks and the waste stone.
As a preferable technical scheme, the four-stage screening process in the step (3) specifically comprises the following steps:
(1) dividing the building waste material mixture into a first-grade building waste material mixture, a second-grade building waste material mixture, a third-grade building waste material mixture and a fourth-grade building waste material mixture;
(2) putting the primary building waste material mixture into a jaw crusher through a feeder to be crushed to be below 40mm, and sending the crushed mixture into a primary screening device to be screened to obtain a primary recycled building mixture of 20-40 mm;
(3) putting the secondary building waste mixture into a jaw crusher through a feeding machine, crushing the mixture to be below 20mm, and feeding the crushed mixture into a secondary screening device to screen the mixture to obtain a secondary recycled building mixture of 10-20 mm;
(4) stirring and crushing the three-level building waste material mixture to below 10mm by using a cone crusher, and feeding the mixture into a three-level screening device for screening to obtain a 5-10mm three-level recycled building mixture;
(5) stirring and crushing the four-grade building waste material mixture to below 5mm by using a cone crusher, and feeding the mixture into a four-grade screening device for screening to obtain a 0-5mm four-grade regenerated building mixture;
the mass ratio of the first-level building waste material mixture, the second-level building waste material mixture, the third-level building waste material mixture and the fourth-level building waste material mixture is (4-6): (3-5): (6-10): (4-8);
building rubbish is municipal solid waste's main component part, it is great at municipal refuse's proportion, especially abandonment concrete piece and abandonment building stones, area is great, cyclic utilization remains to promote, in order to satisfy the operation requirement of building abandonment material base concrete for infilled wall constructional column, as an preferred technical scheme, through level four screening technology in this application, carry out make full use of behind handling the screening with abandonment concrete piece and abandonment building stones, as the raw materials of building abandonment material base concrete for infilled wall constructional column, reduce cement, the use of grit, a large amount of building rubbish is absorbed, realize the resource recycle of abandonment concrete piece and abandonment building stones. In the research process, the mass ratio of 1: 1, treating the waste concrete blocks and waste stone raw materials to obtain the concrete-stone composite material with the mass ratio of (4-6): (3-5): (6-10): (4-8), and then applying the construction waste mixture to the preparation of concrete, so that the slump loss of the concrete is effectively reduced, and the provided concrete has outstanding later strength and workability by matching with river sand, mineral admixture and cement, and meets the use requirements of the concrete for filling wall constructional columns.
As a preferable technical scheme, the fineness modulus of the river sand is 2.5-2.9; preferably, the river sand is river sand of a Saijiang sand factory with the fineness modulus of 2.7; preferably, the cement is a Portland cement having a strength rating of 42.5, available from Xuzhou midrange Cement, Inc.
As a preferred technical scheme, the fly ash is a combination of fly ash of a thermal power plant and secondary fly ash, and the mass ratio of the fly ash of the thermal power plant to the secondary fly ash is (2-4): (1-3), the mass ratio of (2-4): the thermal power plant fly ash and the secondary fly ash in (1-3) are matched with a mineral admixture, so that the durability of the concrete is effectively improved, the compactness of a concrete structure is increased, the phenomena of separation and water precipitation of concrete particles are reduced, and cracks of the concrete are avoided.
The fly ash and the secondary fly ash of the thermal power plant are purchased from the super-extension environmental protection science and technology company Limited in Anhui.
Has the beneficial effects that:
1. the invention provides building waste material base concrete for a filler wall constructional column, which realizes resource recycling of building waste concrete and waste stone, is low in production cost and is easy for large-scale industrial application.
2. The mass ratio of the components is (75-85): (40-50): (20-30) the mineral admixture effectively increases the later strength of the concrete, improves the working performance of the newly mixed concrete, reduces the cement consumption, reduces the production cost and reduces the temperature rise of the concrete.
3. Adopting the mass ratio of (1-3): (0.5-1): (1.2-1.8) when the limestone coarse powder, the limestone fine powder and the limestone ultrafine powder are mixed with the mineral powder and the fly ash, the cohesiveness and the water-retaining property of a concrete mixture are effectively improved, large capillary pores in concrete are reduced, the pore structure of the concrete is optimized, the compactness of the concrete structure is increased, the frost resistance, the impermeability and the sulfate erosion resistance of the provided concrete are improved, the durability of the concrete is improved, the workability is good, the slump loss of the concrete is reduced, and the provided concrete meets the use requirements of a filling wall constructional column.
4. Through level four screening technology in this application, carry out make full use of behind handling the screening with abandonment concrete piece and abandonment building stones, as the raw materials of building abandonment material basic concrete for the infilled wall constructional column, reduce the use of cement, grit, absorb building rubbish in a large number, realize the resource recycle of abandonment concrete piece and abandonment building stones.
5. Mixing the components in a mass ratio of about 1: 1, processing the waste concrete blocks and waste stone raw materials to obtain the concrete-stone composite material with the mass ratio of (4-6): (3-5): (6-10): (4-8), and then applying the construction waste mixture to the preparation of concrete, so that the slump loss of the concrete is effectively reduced, and the provided concrete has outstanding later strength and workability by matching with river sand, mineral admixture and cement, and meets the use requirements of the concrete for filling wall constructional columns.
Detailed Description
Example 1
The embodiment 1 of the invention provides a building waste material-based concrete for a filler wall constructional column, which comprises the following preparation raw materials in parts by weight: 300 parts of waste concrete blocks, 300 parts of waste stone, 280 parts of cement, 150 parts of mineral admixture, 350 parts of river sand, 5 parts of admixture and 180 parts of water.
The mineral admixture comprises mineral powder, limestone powder and fly ash; the mass ratio of the mineral powder to the limestone powder to the fly ash is 80: 45: 25; the limestone powder comprises coarse limestone powder, fine limestone powder and ultrafine limestone powder, and the mass ratio of the coarse limestone powder to the fine limestone powder to the ultrafine limestone powder is 2: 0.8: 1.5; the fineness of the limestone coarse powder is 300m 2 Per kg, the fineness of the limestone coarse powder is 400m 2 Per kg, the fineness of the limestone ultrafine powder is 500m 2 /kg。
The additive is a water reducing agent which is a TS-JS retarding polycarboxylic acid high-efficiency water reducing agent.
In another aspect, embodiment 1 of the present invention provides a method for preparing a building waste based concrete, including the steps of:
(1) pretreating waste concrete blocks and waste stone materials;
(2) mixing the pretreated waste concrete blocks and waste stone to obtain a building waste mixture;
(3) performing four-stage screening on the building waste mixture obtained in the step (2), and screening into a regenerated building mixture of 20-40mm, 10-20mm, 5-10mm and 0-5 mm;
(4) and uniformly stirring the screened recycled building mixture, cement, mineral admixture, river sand, admixture and water by a mortar stirrer matched with a stirring station.
The pretreatment in the step (1) is specifically as follows: screening the waste concrete blocks and the waste stone respectively through a screening device with the aperture of 5mm, and removing small-size impurities in the waste concrete blocks and the waste stone.
The four-stage screening process in the step (3) specifically comprises the following steps:
(1) dividing the building waste material mixture into a first-grade building waste material mixture, a second-grade building waste material mixture, a third-grade building waste material mixture and a fourth-grade building waste material mixture;
(2) putting the primary building waste material mixture into a jaw crusher through a feeder to be crushed to be below 40mm, and sending the crushed mixture into a primary screening device to be screened to obtain a primary recycled building mixture of 20-40 mm;
(3) putting the secondary building waste material mixture into a jaw crusher through a feeding machine, crushing the mixture to be less than 20mm, and feeding the crushed mixture into a secondary screening device to screen the crushed mixture to obtain a secondary recycled building mixture of 10-20 mm;
(4) stirring and crushing the three-level building waste material mixture to below 10mm by using a cone crusher, and feeding the mixture into a three-level screening device for screening to obtain a 5-10mm three-level recycled building mixture;
(5) stirring and crushing the four-grade building waste mixture to below 5mm by using a cone crusher, and feeding the mixture into a four-grade screening device for screening to obtain a 0-5mm four-grade recycled building mixture;
the mass ratio of the first-level building waste material mixture, the second-level building waste material mixture, the third-level building waste material mixture and the fourth-level building waste material mixture is 5: 4: 8: 6;
the river sand is river sand of a Saijiang sand factory with the fineness modulus of 2.7; the cement was a conventional portland cement having a strength grade of 42.5, purchased from xuzhou midrange cement, inc.
The fly ash is a combination of the fly ash of the thermal power plant and the secondary fly ash, and the mass ratio of the fly ash of the thermal power plant to the secondary fly ash is 3: 2.
the fly ash and the secondary fly ash of the thermal power plant are purchased from the super-extension environmental protection science and technology company Limited in Anhui.
Example 2
In one aspect, embodiment 2 of the present invention provides a building waste based concrete for a filler wall constructional column, which is prepared from the following raw materials, by weight: 300 parts of waste concrete blocks, 300 parts of waste stone, 260 parts of cement, 160 parts of mineral admixture, 330 parts of river sand, 5 parts of admixture and 170 parts of water.
The mineral admixture comprises mineral powder, limestone powder and fly ash; the mass ratio of the mineral powder to the limestone powder to the fly ash is 85: 50: 25; the limestone powder comprises coarse limestone powder, fine limestone powder and ultrafine limestone powder, and the mass ratio of the coarse limestone powder to the fine limestone powder to the ultrafine limestone powder is 3: 1: 0.8; the fineness of the limestone coarse powder is 300m 2 Per kg, the fineness of the limestone coarse powder is 400m 2 Per kg, the fineness of limestone ultrafine powder is 500m 2 /kg。
The additive is a water reducing agent which is a TS-JS retarding polycarboxylic acid high-efficiency water reducing agent.
In another aspect, embodiment 2 of the present invention provides a method for preparing building waste-based concrete, including the following steps:
(1) pretreating waste concrete blocks and waste stone materials;
(2) mixing the pretreated waste concrete blocks and waste stones to obtain a building waste material mixture;
(3) performing four-stage screening on the building waste mixture obtained in the step (2), and screening into a regenerated building mixture of 20-40mm, 10-20mm, 5-10mm and 0-5 mm;
(4) and uniformly stirring the screened recycled building mixture, cement, mineral admixture, river sand, admixture and water by a mortar stirrer matched with a stirring station.
The pretreatment in the step (1) comprises the following specific steps: screening the waste concrete blocks and the waste stone respectively through a screening device with the aperture of 5mm, and removing small-size impurities in the waste concrete blocks and the waste stone.
The four-stage screening process in the step (3) specifically comprises the following steps:
(1) dividing the building waste material mixture into a first-grade building waste material mixture, a second-grade building waste material mixture, a third-grade building waste material mixture and a fourth-grade building waste material mixture;
(2) putting the primary building waste material mixture into a jaw crusher through a feeder to be crushed to be below 40mm, and sending the crushed mixture into a primary screening device to be screened to obtain a primary recycled building mixture of 20-40 mm;
(3) putting the secondary building waste material mixture into a jaw crusher through a feeding machine, crushing the mixture to be less than 20mm, and feeding the crushed mixture into a secondary screening device to screen the crushed mixture to obtain a secondary recycled building mixture of 10-20 mm;
(4) stirring and crushing the three-level building waste material mixture to below 10mm by using a cone crusher, and feeding the mixture into a three-level screening device for screening to obtain a 5-10mm three-level recycled building mixture;
(5) stirring and crushing the four-grade building waste material mixture to below 5mm by using a cone crusher, and feeding the mixture into a four-grade screening device for screening to obtain a 0-5mm four-grade regenerated building mixture;
the mass ratio of the first-level building waste material mixture, the second-level building waste material mixture, the third-level building waste material mixture and the fourth-level building waste material mixture is 6: 5: 10: 8;
the river sand is river sand of a Saijiang sand factory with the fineness modulus of 2.7; the cement was a conventional portland cement having a strength grade of 42.5, purchased from xuzhou midrange cement, inc.
The coal ash is a combination of coal ash of a thermal power plant and secondary coal ash, and the mass ratio of the coal ash of the thermal power plant to the secondary coal ash is 4: 3.
the fly ash and the secondary fly ash of the thermal power plant are purchased from super-extensive environmental protection science and technology limited company in Anhui province.
Comparative example 1
Comparative example 1 of the present invention provides a construction waste based concrete for a infilled wall constructional column, the specific embodiment of which is the same as example 1 except that the mineral admixture does not include limestone powder.
Comparative example 2
Comparative example 2 of the present invention provides a construction waste based concrete for a infilled wall constructional column, which is the same as example 1 in the specific embodiment thereof except that the fineness modulus of the river sand is 2.1.
Comparative example 3
Comparative example 3 of the present invention provides a construction waste based concrete for a infilled wall constructional column, the specific embodiment of which is the same as in example 1, wherein the mass ratio of the first-grade construction waste mixture, the second-grade construction waste mixture, the third-grade construction waste mixture and the fourth-grade construction waste mixture is 8: 0.1: 0.1: 0.1.
performance test method
1. Compressive strength: the concrete prepared in the examples and the comparative examples was tested for 28d compressive strength (MPa) according to the national standard "method for testing mechanical properties of ordinary concrete".
2. Workability: according to the method of 'workability test of concrete mixture', a slump barrel (with an upper opening of 100mm, a lower opening of 200mm and a barrel height of 300mm) is inverted, concrete prepared in the embodiment and the comparative example is filled and leveled, the slump barrel is lifted vertically upwards, and the height of the highest point of the slump-reduced concrete is subtracted from the barrel height to obtain the slump.
3. Water seepage rate: the water absorption rate of the concrete prepared in the examples and the comparative examples for 120min is tested according to the standard of the test method for the performance of common concrete mixture.
Table 1 results of performance test of the concrete prepared in examples 1 to 2 and comparative examples 1 to 3.
Claims (10)
1. The building waste material-based concrete for the filled wall constructional column is characterized by comprising the following preparation raw materials in parts by weight: 350 parts of waste concrete block 280-containing material, 320 parts of waste stone material 250-containing material, 300 parts of cement 200-containing material, 180 parts of mineral admixture 120-containing material, 400 parts of river sand 300-containing material, 4-6 parts of admixture and 180 parts of water 170-containing material.
2. The building waste based concrete for a filled wall constructional column as recited in claim 1, wherein the mineral admixture comprises at least mineral powder, limestone powder and fly ash.
3. The building waste based concrete for the filled wall constructional column as recited in claim 2, wherein the mineral admixture comprises 70-90 parts by weight of mineral powder, 30-50 parts by weight of limestone powder and 20-40 parts by weight of fly ash.
4. The construction waste-based concrete for a filler wall constructional column as recited in claim 2 or 3, wherein the fineness of said limestone powder is 300-500m 2 /kg。
5. The construction waste based concrete for a filled wall constructional column as recited in any one of claims 2 to 4, wherein said limestone powder comprises coarse limestone powder, fine limestone powder, ultra-fine limestone powder.
6. The building waste-based concrete for the filled wall constructional column according to claim 1, wherein the additive is a water reducing agent selected from at least one of polycarboxylic acid water reducing agents, melamine water reducing agents and naphthalene water reducing agents.
7. A method of preparing a construction waste based concrete for a filled wall construction column according to any one of claims 1 to 6, comprising at least the steps of:
(1) pretreating waste concrete blocks and waste stone materials;
(2) mixing the pretreated waste concrete blocks and waste stones to obtain a building waste material mixture;
(3) performing four-stage screening on the building waste mixture obtained in the step (2), and screening into a regenerated building mixture of 20-40mm, 10-20mm, 5-10mm and 0-5 mm;
(4) and uniformly stirring the screened recycled building mixture, cement, mineral admixture, river sand, admixture and water by a mortar stirrer matched with a stirring station.
8. The preparation method of the building waste based concrete for the filled wall constructional column as recited in claim 7, wherein the pretreatment in the step (1) is specifically: screening the waste concrete blocks and the waste stone respectively through a screening device with the aperture of 3-5mm, and removing small-size impurities in the waste concrete blocks and the waste stone.
9. The method for preparing the construction waste based concrete for a infilled wall constructional column according to claim 7, characterized in that the fineness modulus of the river sand in the step (4) is 2.5-2.9.
10. The building waste material-based concrete for the filled wall constructional column as claimed in claim 3, wherein the fly ash is a combination of fly ash from a thermal power plant and secondary fly ash, and the mass ratio of the fly ash from the thermal power plant to the secondary fly ash is (2-4): (1-3).
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