CN112830734A - Mortar prepared from waste bricks and tiles and having good fluidity and preparation method thereof - Google Patents
Mortar prepared from waste bricks and tiles and having good fluidity and preparation method thereof Download PDFInfo
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- CN112830734A CN112830734A CN202110080614.5A CN202110080614A CN112830734A CN 112830734 A CN112830734 A CN 112830734A CN 202110080614 A CN202110080614 A CN 202110080614A CN 112830734 A CN112830734 A CN 112830734A
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- China
- Prior art keywords
- waste
- tiles
- tile
- mortar
- brick
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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
- 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
- C04B28/04—Portland 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- 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
-
- 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
- C04B2111/60—Flooring materials
-
- 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
-
- 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
Abstract
The invention relates to a mortar prepared from waste bricks and tiles and having good fluidity and a preparation method thereof, belonging to the field of building materials and comprising the following components in parts by weight: 200 portions of cementing material 120-; the components are mixed with water in proportion, and the mixture is stirred and poured to form the mortar with good fluidity, so that the problems of wide sources and complex composition of waste bricks and tiles, and large differences of components and properties of recycled aggregate and powder obtained after the waste bricks and tiles from different sources are solved, and the problem that the mortar prepared after the waste bricks and tiles are treated is often poor in fluidity is solved.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to mortar prepared from waste bricks and tiles and having good fluidity and a preparation method thereof.
Background
During the processes of extension, leveling, repairing, demolition and cleaning of various buildings, wastes such as residual mud, waste bricks and tiles, mud and the like can be generated. In recent years, due to the continuous development of the construction industry and the demolition of a large number of old buildings, the production of urban construction waste, particularly waste bricks and tiles, has been increasing. At present, no corresponding specific measures are provided for reasonably disposing the waste bricks and tiles, and the waste bricks and tiles are generally simply sent to a refuse landfill for landfill treatment instead of being recycled in a new building. A large amount of waste bricks and tiles are mainly buried, not only occupy cultivated land resources, but also cause serious damage to the surrounding ecological environment for a long time. On the other hand, the raw materials of the building material industry are increasingly deficient, but with the future increase of the engineering construction amount of China, a large amount of natural aggregate and admixture resources are still needed. At present, the shortage of raw material resources of sand and admixture and the quality problem of the raw materials caused by the shortage become bottlenecks restricting the technical development of the building mortar and hidden dangers of harming the safety of buildings. Therefore, if the waste tiles are recycled into recycled aggregate and recycled admixture to be applied to the building mortar, the sustainable development can be realized, the problems of environmental pollution, resource and energy consumption and the like caused by the waste tiles can be reduced to the maximum extent, and the recycled admixture can be applied to building material products as recycled resources, so that the building mortar is green, environment-friendly and energy-saving.
The fluidity is an index for evaluating the quality of the mortar, and the mortar prepared by treating the waste bricks and tiles often has poor fluidity because the waste bricks and tiles have wide sources and complex compositions, and the components and the performance of the recycled aggregate and the powder obtained by treating the waste bricks and tiles from different sources have large differences. Therefore, it is necessary to provide a mortar with good fluidity and a preparation method thereof.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides the mortar prepared from the waste bricks and tiles and having good fluidity and the preparation method thereof, which can overcome the problem that the mortar prepared by treating the waste bricks and tiles from different sources has poor fluidity frequently.
In order to realize the purpose, the invention is realized by the following technical scheme:
the mortar with good fluidity prepared by utilizing the waste bricks and tiles comprises the following components in parts by weight: 200 portions of cementing material 120-one, 80-140 portions of waste brick and tile coarse aggregate, 60-120 portions of waste brick and tile fine aggregate, 50-90 portions of waste brick and tile micro powder, 0.3-0.8 portion of cellulose, 0.2-0.8 portion of water reducing agent and 0.2-0.8 portion of tackifier.
Further, the waste brick and tile coarse aggregate, the waste brick and tile fine aggregate and the waste brick and tile micro powder are prepared by the following method: waste bricks and tiles are sorted out from construction waste, a crushing device is used for crushing the waste bricks and tiles, then screening screens with 5mm and 0.16mm sieve pores are used for sorting, the waste bricks and tiles with the particle size value larger than 5mm serve as coarse aggregate of the waste bricks and tiles, the waste bricks and tiles with the particle size value between 0.16mm and 5mm serve as fine aggregate of the waste bricks and tiles, the waste bricks and tiles with the particle size value smaller than 0.16mm are placed into a ball mill for ball milling, and the ball milling is that the specific surface area is larger than or equal to 1000m2/kg, 2400m or less2/kg waste brick and tile micro powder.
Further, the main effective components of the waste tile micro powder are as follows: al (Al)2O310% -30% of SiO240 to 55 percent.
Further, the cementing material is portland cement or aluminate cement; the cellulose is methyl cellulose ether or hydroxypropyl methyl cellulose ether; the water reducing agent is a polycarboxylic acid powder high-efficiency water reducing agent; the tackifier is ethylene-vinyl acetate copolymer latex powder or acrylic latex powder.
A preparation method of mortar with good fluidity prepared by utilizing waste bricks and tiles comprises the following steps: (1) preparing a cementing material, waste brick and tile coarse aggregate, waste brick and tile fine aggregate, waste brick and tile micro powder, cellulose, a water reducing agent and a tackifier according to weight; (2) stirring the mixture obtained in the step (1) and water in a stirring device for 4-8 minutes until the mixture is uniformly mixed; the water is added in the following amount by weight: 80-240 parts of a solvent; (3) and standing the stirring equipment for 5-10 minutes, and then stirring for 4-8 minutes to obtain the mortar with good fluidity prepared by utilizing the waste bricks and tiles.
The invention has the beneficial effects that:
the invention selects waste bricks and tiles from construction waste, and the waste bricks and tiles are crushed and ball-milled to prepare materials with different specifications and different functions. The waste bricks and tiles with the particle size value of more than 5mm are used as the waste brick and tile coarse aggregate, the waste brick and tile coarse aggregate has higher strength and plays a role of a framework in mortar, and when the mortar is stressed, the waste brick and tile coarse aggregate usually bears larger load. In addition, in the hardening process of the mortar, the volume change of the waste brick and tile coarse aggregate caused by chemical reaction can not be generated.
The waste bricks and tiles with the particle size value of 0.16-5 mm are used as waste brick and tile fine aggregates, the waste brick and tile coarse aggregates can generate a certain void ratio in mortar due to the fact that the particle size value of the waste brick and tile coarse aggregates is large, the waste brick and tile fine aggregates can be filled in gaps of the waste brick and tile coarse aggregates, and the waste brick and tile coarse aggregates and the waste brick and tile fine aggregates can cooperatively bear large loads when the mortar is stressed.
The method utilizes the generated fine particles to be ground by a ball mill to obtain the waste tiles with specific surface area more than or equal to 1000m2/kg, 2400m or less2/kg waste brick and tile micro powder.
The basic action mechanism of the waste tile micro powder is filling and lubricating. The waste brick and tile micro powder fills gaps between the waste brick and tile coarse aggregate and the waste brick and tile fine aggregate, so that the water consumption is reduced; after the water is removed from the formed body, fewer holes are left, so that the volume density can be improved, the apparent porosity can be reduced, the structural strength of the material can be improved, and the performance of the material can be optimized.
The main effective components of the waste brick and tile micro powder are as follows: al (Al)2O310% -30% of SiO240 to 55 percent. The SiO2 micropowder is amorphous material, and has hollow spherical activity, no agglomeration and good filling property. After being mixed with cementing material, water, cellulose, water reducing agent and tackifier for coagulation, SiO2Forming silanol group on the surface. Amorphous SiO2As can be seen from the structural model of (A), SiO2Capillary channels are arranged inside, the surface of the capillary channels can be slowly ionized, namely, the capillary channels have broken bonds, and the capillary channels can easily form Si-HO (namely, silanol) groups after meeting water and can also be dissociated into Si-O in water2H, i.e. silanol group has stronger hydrophilicity and activity. The tendency of flocculation may occur due to the presence of OH groups on the silica micropowder particles, and such hydrogen bonding is relatively goodWeak, slightly shear force, re-dispersion, viscosity reduction: stressed SiO2Intermingled and condensed, and the viscosity is increased2The micro powder has good thixotropy and certain cohesiveness.
SiO2The micro powder forms colloid particles in water, when the micro powder coexists with the water reducing agent, double electric layers are formed on the surfaces of the particles and overlapped to generate electrostatic repulsion, so that the interface energy is reduced, the adsorption and flocculation among the particles are prevented, and the fluidity of the mortar is increased; at the same time, SiO2The micro powder forms colloid in water, and the colloid particles adsorb the water reducing agent around the colloid particles to form a solvent layer, so that the fluidity of the mortar is increased, and the forming performance of the mortar is improved. Al (Al)2O3The micro powder also plays a role in filling, reduces the porosity of the mortar, reduces structural defects in the mortar, and improves the strength of the mortar.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below to facilitate understanding of the skilled person.
A preparation method of mortar with good fluidity prepared by utilizing waste bricks and tiles comprises the following steps: (1) preparing a cementing material, waste brick and tile coarse aggregate, waste brick and tile fine aggregate, waste brick and tile micro powder, cellulose, a water reducing agent and a tackifier according to weight; (2) stirring the mixture obtained in the step (1) and water in a stirring device for 4-8 minutes until the mixture is uniformly mixed; the water is added in the following amount by weight: 80-240 parts of a solvent; (3) and standing the stirring equipment for 5-10 minutes, and then stirring for 4-8 minutes to obtain the mortar with good fluidity prepared by utilizing the waste bricks and tiles.
Wherein, the cementing material, the waste brick and tile coarse aggregate, the waste brick and tile fine aggregate, the waste brick and tile micro powder, the cellulose, the water reducing agent and the tackifier in parts by weight are shown in the table 1.
Table 1 examples 1-3 mortar with good fluidity prepared from waste tiles and its components and weight parts
The mortar of the comparative example has the same preparation method as the mortar of the invention, wherein the cementing materials, the waste brick and tile coarse aggregates, the waste brick and tile fine aggregates, the waste brick and tile micro powder, the cellulose, the water reducing agent and the tackifier of the comparative examples 1-3 are shown in the table 2 in parts by weight.
Table 2 comparative examples 1 to 3 compositions and parts by weight of a mortar prepared from waste bricks and tiles and having good fluidity
The mortars prepared according to the examples 1 to 3 and the comparative examples 1 to 3 are used as ground mortars, performance indexes of the mortars prepared by the mortars are detected, the water retention property, the 28d compressive strength, the 28d seepage pressure resistance and the fluidity of the examples 1 to 3 and the comparative examples 1 to 3 are detected according to the GB/T25181-2019 method, and the detection results are shown in the table 3.
TABLE 3 results of performance index measurements of examples 1-3 and comparative examples 1-3
As can be seen from Table 3, the performances of the mortars of examples 1 to 3 meet the standard GB/T25181-2019, and the water retention, 28d compressive strength, 28d seepage pressure resistance and fluidity of the mortars are all superior to those of the comparative example.
The waste brick and tile coarse aggregate can generate a certain voidage in the mortar due to the larger particle size value of the waste brick and tile coarse aggregate, the waste brick and tile fine aggregate can be filled in the gap of the waste brick and tile coarse aggregate, and the waste brick and tile coarse aggregate and the waste brick and tile fine aggregate can cooperate with each other when the mortar is stressedBear larger load at the same time; the waste brick and tile micro powder fills gaps between the waste brick and tile coarse aggregate and the waste brick and tile fine aggregate, so that the water consumption is reduced; after the water is removed from the formed body, fewer holes are left, so that the volume density can be improved, the apparent porosity can be reduced, the structural strength of the material can be improved, and the performance of the material can be optimized. SiO22Capillary channels are arranged inside, the surface of the capillary channels can be slowly ionized, namely, the capillary channels have broken bonds, and the capillary channels can easily form Si-HO (namely, silanol) groups after meeting water and can also be dissociated into Si-O in water2H, i.e. silanol group has stronger hydrophilicity and activity.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a mortar that mobility is good that utilizes abandonment brick and tile to prepare which characterized in that: the mortar with good fluidity prepared by utilizing the waste bricks and tiles comprises the following components in parts by weight: 200 portions of cementing material 120-one, 80-140 portions of waste brick and tile coarse aggregate, 60-120 portions of waste brick and tile fine aggregate, 50-90 portions of waste brick and tile micro powder, 0.3-0.8 portion of cellulose, 0.2-0.8 portion of water reducing agent and 0.2-0.8 portion of tackifier.
2. The mortar prepared from waste bricks and tiles and having good fluidity according to claim 1, is characterized in that: the waste brick and tile coarse aggregate, the waste brick and tile fine aggregate and the waste brick and tile micro powder are prepared by the following method: waste bricks and tiles are sorted out from construction waste, a crushing device is used for crushing the waste bricks and tiles, then screening screens with 5mm and 0.16mm sieve pores are used for sorting, the waste bricks and tiles with the particle size value larger than 5mm serve as coarse aggregate of the waste bricks and tiles, the waste bricks and tiles with the particle size value between 0.16mm and 5mm serve as fine aggregate of the waste bricks and tiles, the waste bricks and tiles with the particle size value smaller than 0.16mm are placed into a ball mill for ball milling, and the ball milling is that the specific surface area is larger than or equal to 1000m2/kg, 2400m or less2/kg waste brick and tile micro powder.
3. The mortar prepared from waste bricks and tiles and having good fluidity according to claim 2, is characterized in that: the main effective components of the waste tile micro powder are as follows: al (Al)2O310% -30% of SiO240 to 55 percent.
4. The mortar prepared from waste tiles and having good fluidity according to claim 1 or 3, wherein: the cementing material is Portland cement or aluminate cement; the cellulose is methyl cellulose ether or hydroxypropyl methyl cellulose ether; the water reducing agent is a polycarboxylic acid powder high-efficiency water reducing agent; the tackifier is ethylene-vinyl acetate copolymer latex powder or acrylic latex powder.
5. A method for preparing mortar with good fluidity by using waste tiles according to any one of claims 1 to 4, which is characterized in that: the method comprises the following steps: (1) preparing a cementing material, waste brick and tile coarse aggregate, waste brick and tile fine aggregate, waste brick and tile micro powder, cellulose, a water reducing agent and a tackifier according to weight; (2) stirring the mixture obtained in the step (1) and water in a stirring device for 4-8 minutes until the mixture is uniformly mixed; the water is added in the following amount by weight: 80-240 parts of a solvent; (3) and standing the stirring equipment for 5-10 minutes, and then stirring for 4-8 minutes to obtain the mortar with good fluidity prepared by utilizing the waste bricks and tiles.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110080614.5A CN112830734A (en) | 2021-01-21 | 2021-01-21 | Mortar prepared from waste bricks and tiles and having good fluidity and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110080614.5A CN112830734A (en) | 2021-01-21 | 2021-01-21 | Mortar prepared from waste bricks and tiles and having good fluidity and preparation method thereof |
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| CN112830734A true CN112830734A (en) | 2021-05-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113980623A (en) * | 2021-11-18 | 2022-01-28 | 三棵树涂料股份有限公司 | Bio-based high-strength joint filling repair heat insulation material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104788054A (en) * | 2015-04-10 | 2015-07-22 | 浙江大学宁波理工学院 | Eco-friendly self-compacting concrete prepared through complete recycling of waste concrete |
| CN108840714A (en) * | 2018-09-17 | 2018-11-20 | 重庆能源职业学院 | A kind of thermal insulation concrete and preparation method thereof using waste |
| CN110395952A (en) * | 2019-07-29 | 2019-11-01 | 同济大学 | A kind of luminous road surface and preparation method thereof |
| CN110526639A (en) * | 2019-05-21 | 2019-12-03 | 清华大学 | A kind of low cement regenerates rock-fill concrete construction method entirely |
-
2021
- 2021-01-21 CN CN202110080614.5A patent/CN112830734A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104788054A (en) * | 2015-04-10 | 2015-07-22 | 浙江大学宁波理工学院 | Eco-friendly self-compacting concrete prepared through complete recycling of waste concrete |
| CN108840714A (en) * | 2018-09-17 | 2018-11-20 | 重庆能源职业学院 | A kind of thermal insulation concrete and preparation method thereof using waste |
| CN110526639A (en) * | 2019-05-21 | 2019-12-03 | 清华大学 | A kind of low cement regenerates rock-fill concrete construction method entirely |
| CN110395952A (en) * | 2019-07-29 | 2019-11-01 | 同济大学 | A kind of luminous road surface and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113980623A (en) * | 2021-11-18 | 2022-01-28 | 三棵树涂料股份有限公司 | Bio-based high-strength joint filling repair heat insulation material and preparation method thereof |
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