CN109020318B - Baking-free solid brick utilizing redundant soil of construction waste and preparation method thereof - Google Patents
Baking-free solid brick utilizing redundant soil of construction waste and preparation method thereof Download PDFInfo
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- CN109020318B CN109020318B CN201810942713.8A CN201810942713A CN109020318B CN 109020318 B CN109020318 B CN 109020318B CN 201810942713 A CN201810942713 A CN 201810942713A CN 109020318 B CN109020318 B CN 109020318B
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- 239000002699 waste material Substances 0.000 title claims abstract description 152
- 239000011449 brick Substances 0.000 title claims abstract description 96
- 238000010276 construction Methods 0.000 title claims abstract description 66
- 239000002689 soil Substances 0.000 title claims abstract description 64
- 239000007787 solid Substances 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 239000004567 concrete Substances 0.000 claims abstract description 27
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 239000004576 sand Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000011895 specific detection Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
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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)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of non-fired solid bricks made of construction waste, and discloses a non-fired solid brick made of construction waste redundant soil and a preparation method thereof. The invention comprises the following raw material components in parts by weight: the material comprises the following raw material components in parts by weight: 5-20 parts of cement, 70-90 parts of construction waste redundant soil and 5-13 parts of water, wherein the construction waste redundant soil comprises the following raw material components in parts by weight: 50-70 parts of waste bricks and tiles, 10-20 parts of waste concrete, 10-20 parts of waste mortar and 5-10 parts of slag soil. The invention uses the construction waste raw material with high mud content, has lower requirement on the crushing grain size of the raw material, has low preparation cost and good compressive strength of the prepared product.
Description
Technical Field
The invention relates to the technical field of non-fired solid bricks made of construction wastes, in particular to a non-fired solid brick made of construction wastes and redundant soil and a preparation method thereof.
Background
The baking-free brick is a novel wall material which is manufactured without high-temperature calcination, one or more of fly ash, cinder, coal gangue, tailing slag, chemical slag or natural sand and tidal marsh mud are usually used as main raw materials, and the traditional baking-free brick has good compressive strength but high preparation cost.
In recent years, due to the generation of a large amount of construction waste, the reuse thereof has become a research hotspot. At present, the existing method for applying construction waste to non-fired solid bricks is that the applied construction waste is mainly waste concrete recycled aggregate, and no relevant application research is carried out on other types of construction waste, such as waste bricks and tiles, waste mortar, slag soil and the like.
The recycled material of the construction waste after the treatment of the soil removal process is redundant soil, the redundant soil accounts for 20-30% of the total amount of the construction waste, but the mud content in the redundant soil is generally 10-30%, and the rest components are waste red bricks, waste concrete, waste mortar and a small amount of impurities, so that the solid bricks prepared by the existing manufacturing method of the baking-free bricks containing the construction waste have lower strength and cannot meet the performance requirements of the related solid bricks; the high mud content of redundant soil limits the use of the redundant soil in resource reutilization; in addition, most of the existing preparation methods adopt secondary or even tertiary treatment powder after the soil removal of the construction waste, the required particle size of the powder can be as low as about 0.5mm, and the utilization rate of the construction waste is low.
Disclosure of Invention
The invention provides a baking-free solid brick using redundant soil of building waste and a preparation method thereof, wherein the baking-free solid brick uses a building waste raw material with high mud content, has low requirement on the crushed particle size of the raw material, low preparation cost and good compressive strength of the prepared product.
The technical problem to be solved is that: the application of the existing construction waste in the baking-free brick is mainly waste concrete, the rest waste is not generally applied in the baking-free brick due to low strength and high mud content, and the rest kinds of construction waste cannot be effectively recycled, so that the serious environmental burden caused by the construction waste cannot be solved, and the serious material waste is caused; the existing construction waste has low requirement on the application particle size, redundant soil with larger particle size cannot be directly applied, and the requirement on raw material treatment is high.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a baking-free solid brick utilizing redundant soil of construction waste, which comprises the following raw material components in parts by weight: 5-20 parts of cement, 70-90 parts of construction waste redundant soil and 5-13 parts of water, wherein the construction waste redundant soil comprises the following raw material components in parts by weight: 50-70 parts of waste bricks and tiles, 10-20 parts of waste concrete, 10-20 parts of waste mortar and 5-10 parts of slag soil.
The invention utilizes the baking-free solid bricks of the construction waste redundant soil, and further, the mud content of the construction waste redundant soil is 10-20%, and the water content is 3-10%.
The invention utilizes the baking-free solid bricks made of the redundant soil of the construction waste, and further, the particle size of the waste bricks and tiles is not more than 10mm, wherein the mass of the raw materials with the particle size of more than 4.75mm accounts for not less than 50 percent of the total mass of the waste bricks and tiles.
The invention utilizes the baking-free solid bricks of the redundant soil of the construction waste, and further, the particle size of the waste concrete is not more than 10mm, wherein the mass of the raw materials with the particle size of more than 4.75mm accounts for not less than 30 percent of the total mass of the waste concrete.
The invention utilizes the baking-free solid bricks of the redundant soil of the construction waste, and further, the particle size of the waste mortar is not more than 10mm, wherein the mass of the raw materials with the particle size of less than 2.36mm accounts for not more than 30% of the total mass of the waste mortar.
The baking-free solid brick utilizes the building waste redundant soil, and further, the grain diameter of the slag soil is not more than 2.36mm, wherein the mass of the raw materials with the grain diameter of less than 0.075mm accounts for not less than 60% of the total mass of the slag soil.
The invention utilizes the baking-free solid bricks of the redundant soil of the construction waste, and further, the crushing value of the waste bricks and tiles is less than 50.0 percent, the crushing value of the waste concrete is less than 15.0 percent, and the crushing value of the waste mortar is less than 50.0 percent.
The invention relates to a preparation method of a baking-free solid brick by utilizing redundant soil of construction waste, which is characterized by comprising the following steps of: the method comprises the following steps:
step one, raw material sorting: sorting the raw materials of the construction waste, and classifying and finishing waste bricks and tiles with the particle size of more than 100mm, waste concrete, waste mortar and muck with the particle size of less than 100 mm;
step two, crushing raw materials: respectively crushing and sieving the building garbage obtained in the step one to respectively obtain waste brick and tile aggregate, waste concrete aggregate and waste mortar aggregate with the particle size of not more than 10mm and muck with the particle size of not more than 2.36 mm;
step three, preparing materials: preparing materials according to the following parts by weight:
5-20 parts of cement, 70-90 parts of construction waste redundant soil and 5-13 parts of water, wherein the construction waste redundant soil comprises the following raw material components in parts by weight: 50-70 parts of waste bricks and tiles, 10-20 parts of waste concrete, 10-20 parts of waste mortar and 5-10 parts of slag soil
Step four, forming a solid brick: mixing the raw materials weighed in the step three, uniformly stirring, and pressing and forming;
step five, maintenance: and curing the prepared solid brick.
The invention relates to a preparation method of a baking-free solid brick by utilizing redundant soil of building waste, and further comprises the step four of adopting a brick making machine to press and form the solid brick, wherein the exciting force of the brick making machine is 50-58kn, the amplitude is 2-3mm, and the vibration frequency is 72 times/minute.
Compared with the prior art, the baking-free solid brick utilizing the redundant soil of the construction waste and the preparation method thereof have the following beneficial effects:
the invention utilizes the baking-free solid bricks of the redundant soil of the construction waste to prepare the baking-free solid bricks with the compressive strength grade meeting MU5.0-MU10.0 by strictly screening the grain sizes of various construction wastes and controlling the proportioning components among the construction wastes of various components and using the redundant soil with the mud content of 10-20% and the water content of 3-10% for preparing the baking-free bricks, and the preparation process does not use any other additive, thereby having low preparation cost.
The construction waste types utilized by the invention comprise waste bricks and tiles, waste concrete, waste mortar, waste soil and the like, the utilization range of the construction waste is wide, and the burden of various types of construction waste on the environment can be solved to a greater extent; and the redundant soil after the construction waste is crushed is used, the produced solid brick has light volume weight, good thermal insulation performance, high strength, small water absorption and good softening performance, can reach the national standard of the building brick, is green, environment-friendly and pollution-free, realizes the resource recycling of the construction waste, and has great economic benefit and social benefit.
The building waste redundant soil disclosed by the invention contains 10-20% of mud, and also contains a large amount of waste red bricks, waste concrete, waste mortar, fine sand and muck, and the red bricks are light in volume weight and good in heat-insulating property, so that the volume weight of solid bricks can be effectively reduced, and the heat-insulating property of the solid bricks is improved; the fine sand can effectively fill the grain composition of the redundant soil, and the strength and the compactness of the solid brick are improved; a proper amount of muck can effectively fill gaps of the solid bricks, and a certain hardening effect is formed in the pressing process.
The invention directly utilizes the redundant soil after the construction waste is crushed, the particle size is not more than 10mm, the redundant soil belongs to a material with relatively small strength, the redundant soil is screened and classified after being crushed, the preparation process is simple and easy to operate, the controllability is strong, and the prepared product has stable performance.
Detailed Description
Preparation examples
The invention relates to a baking-free solid brick utilizing redundant soil of building garbage, which is prepared by the following method, and comprises the following steps:
step one, raw material sorting: sorting the raw materials of the construction waste, and sorting the waste bricks and tiles with the grain size of more than 10mm, the waste concrete, the waste mortar and the muck with the grain size of less than 100 mm;
step two, crushing raw materials: respectively crushing and sieving the building garbage obtained in the step one to respectively obtain waste brick and tile aggregate, waste concrete aggregate and waste mortar aggregate with the particle size of not more than 10mm and muck with the particle size of not more than 2.36 mm;
step three, preparing materials: preparing materials according to the parts by weight shown in tables 1 and 2:
step four, forming a solid brick: mixing the raw materials weighed in the step three, uniformly stirring, and then performing compression molding on the solid brick by using a brick making machine, wherein the excitation force of the brick making machine is 50-58kn, the amplitude is 2-3mm, and the vibration frequency is 72 times/minute;
step five, maintenance: and curing the prepared solid brick, wherein the specific curing mode is that the solid brick is firstly cured by hot steaming for 1-7 days, and then cured by self-heating after 7 days.
5-20 parts of cement, 70-90 parts of construction waste redundant soil and 5-13 parts of water, wherein the construction waste redundant soil comprises the following raw material components in parts by weight: 50-70 parts of waste bricks and tiles, 10-20 parts of waste concrete, 10-20 parts of waste mortar and 5-10 parts of slag soil.
TABLE 1 parts by weight of the respective raw material components in the preparation examples
Table 2 concrete components and parts by weight of the construction waste redundant soil in the preparation examples
| Parts by weight (parts) | Preparation example 1 | Preparation example 2 | Preparation example 3 | Preparation example 4 | Preparation example 5 |
| Waste brick and tile | 70 | 50 | 65 | 55 | 60 |
| Waste concrete | 13 | 20 | 17 | 15 | 10 |
| Waste mortar | 10 | 12 | 15 | 20 | 17 |
| Muck | 5 | 10 | 8 | 6 | 7 |
The baking-free solid bricks prepared in the preparation examples are subjected to basic performance detection according to the relevant test method specified in JG/T505-2016 'construction waste recycled aggregate solid bricks', and the specific detection results are shown in Table 3.
Table 3 results of performance test of non-fired solid bricks prepared in preparation examples
| Preparation example 1 | Preparation example 2 | Preparation example 3 | Preparation example 4 | Preparation example 5 | |
| Volume weight kg/m3 | 1568 | 1576 | 1575 | 1623 | 1648 |
| Compressive strength rating | MU5 | MU7.5 | MU10 | MU10 | MU10 |
| Water absorption% | 14.9 | 14.2 | 12.9 | 14.8 | 13.5 |
| Coefficient of softening | 0.75 | 0.77 | 0.74 | 0.72 | 0.78 |
The solid brick products of the same type are applied to waste bricks and waste concrete, the average compressive strength of the products is 8.8MPa, and the water absorption rate is up to 22 percent, the volume weight of the non-fired solid brick prepared by the method of the preparation embodiment of the invention is 1650kg/m of 1550-3The compressive strength grade is MU5.0-MU10.0, the softening coefficient is 0.72-0.78, all performance indexes meet the relevant regulations in JG/T505-.
The invention strictly screens the grain sizes of various construction wastes and controls the proportioning components among the construction wastes, redundant soil with the mud content of 10-20 percent and the water content of 3-10 percent is used for manufacturing the baking-free bricks, the baking-free solid bricks with the compressive strength grade meeting MU5.0-MU10.0 are manufactured, and no other additive is used in the preparation process, so the preparation cost is low.
Comparative examples
A comparative test group was set up using preparation example 3 as a control group, and comparative test groups 1 and 2 were used to prepare baking-free bricks by the following method:
(1) sorting raw materials: classifying and finishing the construction waste, mixing the waste bricks and tiles, the waste concrete, the waste mortar and the slag soil according to a certain proportion, wherein the proportion of the mixed raw materials is the same as the proportion of the waste components of the control group;
(2) mixing the various kinds of construction wastes, uniformly crushing, sieving, and selecting reclaimed materials with the particle sizes not more than 0.25mm and not more than 4mm from comparative test groups 1-1 and 1-2 respectively to replace redundant building waste soil in a comparative test group; wherein, two particle size requirements of 0.25mm and 4mm are selected, which refer to the particle size requirement of the common recycled aggregate in the prior art;
(3) weighing the reclaimed material obtained in the step (2), mixing the reclaimed material with cement and water in the same mixing ratio as the control group;
(4) pressing and forming, maintaining, and controlling specific operation and parameters, which are the same as those of the control group.
The solid bricks prepared in the comparative test groups 1 and 2 are subjected to basic performance detection according to the relevant test method specified in JG/T505-2016 'construction waste recycled aggregate solid bricks', and the specific detection results are shown in Table 4.
Table 4 results of performance test of non-fired solid bricks prepared in preparation examples
| Preparation example 3 | Test group 1 | Test group 2 | |
| Volume weight kg/m3 | 1575 | 1528 | 1578 |
| Compressive strength rating | MU10 | MU5 | MU5 |
| Water absorption% | 12.9 | 21.8 | 19.6 |
| Coefficient of softening | 0.74 | 0.55 | 0.62 |
As can be seen from Table 4, the compressive strength of the solid bricks obtained in the test group is significantly lower than that of the control group of the present invention, the compressive strength grade of the solid brick is MU5, the water absorption rate is up to 21.8 percent, which indicates that the mixed use of various construction wastes needs to be definitely mixed according to the component proportion recorded by the invention and the particle size requirement of each component, the compressive strength and the water absorption rate of the prepared solid brick product can meet the requirements of the national standard brick, and the conventional crushing mode in a contrast test group, although the proportion of various raw materials can be controlled, the proportion relation of each component in the redundant soil of the construction waste cannot be accurately controlled, and the method has great uncertainty, the uncertainty greatly influences the performance indexes of the product such as compressive strength, water absorption and the like, and further illustrates that the ratio and the particle size requirement of each component defined by the invention directly determine that the product has better compressive strength and water absorption.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (4)
1. The baking-free solid brick utilizing the redundant soil of the construction waste is characterized in that: the material comprises the following raw material components in parts by weight: 5-20 parts of cement, 70-90 parts of construction waste redundant soil and 5-13 parts of water, wherein the construction waste redundant soil comprises the following raw material components in parts by weight: 50-70 parts of waste bricks and tiles, 10-20 parts of waste concrete, 10-20 parts of waste mortar and 5-10 parts of slag, wherein the mud content of the redundant soil of the building waste is 10-20%, the water content is 3-10%, the particle size of the waste bricks and tiles is not more than 10mm, the mass of the raw materials with the particle size of more than 4.75mm accounts for not less than 50% of the total mass of the waste bricks and tiles, the particle size of the waste concrete is not more than 10mm, the mass of the raw materials with the particle size of more than 4.75mm accounts for not less than 30% of the total mass of the waste concrete, the particle size of the waste mortar is not more than 10mm, the mass of the raw materials with the particle size of less than 2.36mm accounts for not more than 30% of the total mass of the waste mortar, the particle size of the slag is not more than 2.36mm, and the mass of the raw materials with.
2. The baking-free solid brick utilizing the redundant soil of the construction waste according to claim 1, which is characterized in that: the crushing value of the waste bricks and tiles is less than 50.0 percent, the crushing value of the waste concrete is less than 15.0 percent, and the crushing value of the waste mortar is less than 50.0 percent.
3. The preparation method of the baking-free solid brick utilizing the construction waste redundant soil as claimed in any one of claims 1 to 2, which is characterized in that: the method comprises the following steps:
step one, raw material sorting: sorting the raw materials of the construction waste, and classifying and finishing waste bricks and tiles with the particle size of more than 100mm, waste concrete, waste mortar and muck with the particle size of less than 100 mm;
step two, crushing raw materials: respectively crushing and sieving the building garbage obtained in the step one to respectively obtain waste brick and tile aggregate, waste concrete aggregate and waste mortar aggregate with the particle size of not more than 10mm and muck with the particle size of not more than 2.36 mm;
step three, preparing materials: preparing materials according to the following parts by weight: 5-20 parts of cement, 70-90 parts of construction waste redundant soil and 5-13 parts of water, wherein the construction waste redundant soil comprises the following raw material components in parts by weight: 50-70 parts of waste bricks and tiles, 10-20 parts of waste concrete, 10-20 parts of waste mortar and 5-10 parts of residue soil;
step four, forming a solid brick: mixing the raw materials weighed in the step three, uniformly stirring, and pressing and forming;
step five, maintenance: and curing the prepared solid brick.
4. The preparation method of the baking-free solid brick utilizing the construction waste redundant soil according to claim 3, characterized in that: and in the fourth step, a brick making machine is adopted to perform compression molding on the solid brick, the exciting force of the brick making machine is 50-58kN, the amplitude is 2-3mm, and the vibration frequency is 72 times/minute.
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| CN112456940B (en) * | 2020-12-22 | 2024-01-26 | 西安建筑科技大学 | Raw soil-based building block capable of recycling construction waste and manufacturing method |
| CN113429173B (en) * | 2021-07-01 | 2022-12-02 | 南京工业大学 | Engineering muck baking-free corrugated tile and preparation process thereof |
| CN113582641A (en) * | 2021-08-02 | 2021-11-02 | 北京建工资源循环利用投资有限公司 | Inorganic mixture prepared from construction waste recycled aggregate and preparation method thereof |
| CN113526893A (en) * | 2021-08-02 | 2021-10-22 | 北京建工资源循环利用投资有限公司 | Construction waste recycled aggregate, preparation method and application thereof |
| CN114477918A (en) * | 2022-03-07 | 2022-05-13 | 北京建筑大学 | Premixed construction waste regeneration flow state backfill material |
| WO2024082038A1 (en) * | 2022-10-21 | 2024-04-25 | MADALENA FERREIRA SOUZA, Eronildes | Ecological brick |
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| JPH1059756A (en) * | 1996-08-12 | 1998-03-03 | Oozora Recycle Center:Kk | Water permeation rate and water retention value control material formed by using recycled aggregate and its production |
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