CN111039619A - Prefabricated staircase of assembled recycled aggregate lightweight concrete - Google Patents
Prefabricated staircase of assembled recycled aggregate lightweight concrete Download PDFInfo
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- CN111039619A CN111039619A CN201911308688.9A CN201911308688A CN111039619A CN 111039619 A CN111039619 A CN 111039619A CN 201911308688 A CN201911308688 A CN 201911308688A CN 111039619 A CN111039619 A CN 111039619A
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- concrete
- prefabricated staircase
- aggregate
- prefabricated
- lightweight concrete
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/093—Producing shaped prefabricated articles from the material by vibrating or jolting by means directly acting on the material, e.g. by cores wholly or partly immersed in the material or elements acting on the upper surface of the material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/104—Treads
- E04F11/116—Treads of stone, concrete or like material or with an upper layer of stone or stone like material, e.g. ceramics, concrete; of glass or with an upper layer of glass
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
- E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
- E04F2011/021—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass
- E04F2011/0212—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass mainly of concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention discloses an assembled recycled aggregate lightweight concrete prefabricated staircase, which consists of cement, mineral powder, ceramsite, fine aggregate, coarse aggregate, furnace slag, a water reducer and water; according to the prefabricated staircase made of the prefabricated recycled aggregate lightweight concrete, the recycled aggregate concrete and the lightweight concrete are combined, the requirement of the lightweight concrete is met, the strength of the prefabricated staircase meets the requirement of the concrete with the strength grade of C30, and the prefabricated staircase made of the recycled aggregate lightweight concrete is used as a prefabricated lightweight concrete staircase, so that the self weight of a structure is reduced, and the structural safety is improved; the prefabricated staircase made of the prefabricated recycled aggregate lightweight concrete is a product of building industrialization, can be designed in a standardized manner, is prefabricated and finished in a factory, is installed on site, does not need wet operation, has simple process and high efficiency, can absorb and consume a large amount of industrial waste and construction waste, has more environmental protection significance, and has good use prospect.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to an assembled recycled aggregate lightweight concrete prefabricated staircase.
Background
At present, billions of tons of construction wastes are generated in China every year, which accounts for 30 percent or more of the total amount of urban wastes, most of the wastes are stacked in the open air or directly buried, so that serious environmental pollution is caused, and particularly, the waste concrete is used as the most important component of the construction wastes, so that great negative influence is caused on the environment; meanwhile, with the increase of environmental protection pressure, a large amount of natural sand fields and broken stone ores required by concrete production are shut down, the supply of sand and stone materials is short, the price rises, and the construction cost is greatly increased;
the recycled aggregate concrete, called recycled aggregate concrete for short, is prepared by crushing, cleaning and grading waste concrete blocks to form recycled aggregates, and then partially or completely replacing natural gravel aggregates with the recycled aggregates to prepare concrete, and the recycled aggregate concrete is fully utilized, so that the quantity of construction waste can be effectively reduced, the condition of sand and stone supply shortage can be relieved, the environmental pollution can be reduced, and the purpose of protecting the environment can be achieved.
Disclosure of Invention
The invention mainly aims to provide an assembled recycled aggregate lightweight concrete prefabricated staircase, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
the prefabricated staircase is composed of cement, mineral powder, ceramsite, fine aggregate, coarse aggregate, furnace slag, a water reducer and water, wherein the mass ratio of the components is cement: mineral powder: ceramsite: fine aggregate: coarse aggregate: slag: water reducing agent: water = (300-) = (500): (50-150): (200-300)(200-400): (300-500): (200-400): (8-15): (160-190).
Preferably, the preparation method of the prefabricated staircase comprises the following steps:
firstly, cleaning a mold, then coating demolding oil, installing a reinforcement cage, installing embedded parts and the like to obtain an integral mold;
secondly, sequentially adding cement, mineral powder, ceramsite, fine aggregate, coarse aggregate and slag into a stirrer according to the mass mixing ratio of the components, wherein the stirring time is 1min, then adding water and a water reducing agent into the stirrer for stirring, wherein the stirring time is 3min, and then pouring out the mixture to obtain a stirred concrete mixture;
pouring the obtained stirred concrete mixture into a finished mould, slightly vibrating, and compacting the concrete; obtaining a poured mould;
step four, coating a thin film on the concrete in the poured mould after plastering, removing the mould after the curing strength reaches 12MPa, and then putting the mould into a finished product area for moisturizing and curing for not less than 7 days; obtaining a concrete stair needing to be maintained;
fifthly, after the curing strength of the concrete stair to be cured meets the requirement, the concrete stair to be cured is conveyed to a construction site, the concrete stair is connected through bolts with reserved bolt holes, and the connected bolt holes are filled and compacted through grouting materials; the prefabricated staircase can be prepared, and finally the prefabricated staircase made of the prefabricated recycled aggregate lightweight concrete is obtained.
Preferably, the formula comprises the following components in parts by mass: mineral powder: ceramsite: fine aggregate: coarse aggregate: slag: water reducing agent: water = 485: 97: 218: 262: 398: 227: 11.7: 182.
preferably, the cement is portland cement or ordinary portland cement, and the 28-day strength of the cement is not lower than 42.5 MPa.
Preferably, the mineral powder is granulated blast furnace slag powder, and the activity of the mineral powder in 28 days is not less than 95%.
Preferably, the ceramsite is crushed shale ceramsite, and the particle size length of the crushed shale ceramsite is 10 mm.
Preferably, the fine aggregate is broken construction waste, the particle size length is 0-5mm, and the requirements of I and II types of recycled fine aggregates for concrete are met.
Preferably, the coarse aggregate is broken construction waste, the length of the continuous particle size of the broken construction waste is 5-25mm, and the requirements of I and II types of recycled coarse aggregates for concrete are met.
Preferably, the slag is waste slag of a power plant, and the particle size length of the slag is 0-5 mm.
Preferably, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent for concrete, and the water reducing rate is 18-25.
Compared with the prior art, the invention has the following beneficial effects: the prefabricated staircase is designed in a factory in a standardized way, and then is prefabricated, the staircase concrete material uses a large amount of municipal construction waste recycled aggregate and waste slag of a thermal power plant, and can consume a large amount of municipal construction waste and industrial solid waste, and the concrete volume weight is 1900kg/m in 1600-dose cement-rich concrete due to a large amount of slag gaps and light weight3The strength is between 30 and 36MPa, the requirement of light concrete is met, the strength meets the requirement of C30 strength grade concrete, and the prefabricated light concrete stair reduces the self weight of a structure and increases the structural safety; the prefabricated staircase made of the prefabricated recycled aggregate lightweight concrete is a product of building industrialization, can be better combined with the building industrialization, can be designed in a standardized way, and is prefabricated in a factory; the method has the advantages of field installation, no need of wet operation, simple process, high efficiency, capability of absorbing and consuming a large amount of industrial wastes and construction wastes, and more environmental protection significance.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
During preparation, firstly, the prefabricated staircase with the prefabricated recycled aggregate and the lightweight concrete is composed of cement, mineral powder, ceramsite, fine aggregate, coarse aggregate, furnace slag, a water reducer and water, wherein the prefabricated staircase with the prefabricated recycled aggregate and the lightweight concrete is prepared from the following components in parts by mass: mineral powder: ceramsite: fine aggregate: coarse aggregate: slag: water reducing agent: water = 485: 97: 218: 262: 398: 227: 11.7: 182, the cement is portland cement or ordinary portland cement, the 28-day strength of the cement is not lower than 42.5MPa, the mineral powder is granulated blast furnace slag powder, the 28-day activity of the mineral powder is not lower than 95%, the ceramsite is crushed shale ceramsite, the particle size length of the ceramsite is 10mm, the fine aggregate is crushed construction waste, the particle size length of the fine aggregate is 4.5mm, and the requirement of I and II types of regenerated fine aggregates for concrete is met, the coarse aggregate is crushed construction waste, the continuous particle size length of the coarse aggregate is 22mm, and the requirement of I and II types of regenerated coarse aggregates for concrete is met, the slag is waste slag of a power plant, the particle size length of the slag is 0-5mm, the water reducer is a polycarboxylic acid high-efficiency water reducer for concrete, and the water reduction rate is 25%; the preparation method of the prefabricated staircase comprises the following steps: firstly, cleaning a mold, then coating demolding oil, installing a reinforcement cage, installing embedded parts and the like to obtain an integral mold; secondly, sequentially adding cement, mineral powder, ceramsite, fine aggregate, coarse aggregate and slag into a stirrer according to the mass mixing ratio of the components, wherein the stirring time is 1min, then adding water and a water reducing agent into the stirrer for stirring, wherein the stirring time is 3min, and then pouring out the mixture to obtain a stirred concrete mixture; pouring the obtained stirred concrete mixture into a finished mould, slightly vibrating, and compacting the concrete; obtaining a poured mould; coating the surface of the concrete in the poured mould, then covering a film, removing the mould after the curing strength reaches 12MPa, and then putting the mould into a finished product area for moisture preservation and curing for 8 days; obtaining a concrete stair needing to be maintained; after the curing strength of the concrete stair to be cured meets the requirement, conveying the concrete stair to a construction site, connecting the concrete stair to the construction site by using bolts with reserved bolt holes, and filling and compacting the connected bolt holes by using grouting materials; the prefabricated staircase can be prepared;
and manufacturing compression proof blocks under the same conditions in each production batch, testing, curing the cube standard test piece with the side length of 20cm, and measuring the standard value of the compression proof ultimate strength of 34.6N/mm2 by using a standard test method in the age of 28 days.
Example 2
During preparation, firstly, the prefabricated staircase with the prefabricated recycled aggregate and the lightweight concrete is composed of cement, mineral powder, ceramsite, fine aggregate, coarse aggregate, furnace slag, a water reducer and water, wherein the prefabricated staircase with the prefabricated recycled aggregate and the lightweight concrete is prepared from the following components in parts by mass: mineral powder: ceramsite: fine aggregate: coarse aggregate: slag: water reducing agent: water = 490: 100: 205: 252: 378: 225: 10.9: 191, the cement is portland cement or ordinary portland cement, the 28-day strength of the cement is not lower than 42.5MPa, the mineral powder is granulated blast furnace slag powder, the 28-day activity of the mineral powder is not lower than 95%, the ceramsite is crushed shale ceramsite, the particle size length of the ceramsite is 10mm, the fine aggregate is crushed building waste, the particle size length of the fine aggregate is 3.5mm, and the requirements of I and II types of regenerated fine aggregates for concrete are met, the coarse aggregate is crushed building waste, the continuous particle size length of the coarse aggregate is 20mm, and the requirements of I and II types of regenerated coarse aggregates for concrete are met, the slag is waste slag of a power plant, the particle size length of the waste slag is 4.5mm, the water reducer is a polycarboxylic acid high-efficiency water reducer for concrete, and the water reduction rate is 22%; the preparation method of the prefabricated staircase comprises the following steps: firstly, cleaning a mold, then coating demolding oil, installing a reinforcement cage, installing embedded parts and the like to obtain an integral mold; secondly, sequentially adding cement, mineral powder, ceramsite, fine aggregate, coarse aggregate and slag into a stirrer according to the mass mixing ratio of the components, wherein the stirring time is 1min, then adding water and a water reducing agent into the stirrer for stirring, wherein the stirring time is 3min, and then pouring out the mixture to obtain a stirred concrete mixture; pouring the obtained stirred concrete mixture into a finished mould, slightly vibrating, and compacting the concrete; obtaining a poured mould; coating the surface of the concrete in the poured mould, then covering a film, removing the mould after the curing strength reaches 12MPa, and then putting the mould into a finished product area for moisture preservation and curing for 10 days; obtaining a concrete stair needing to be maintained; after the curing strength of the concrete stair to be cured meets the requirement, conveying the concrete stair to a construction site, connecting the concrete stair to the construction site by using bolts with reserved bolt holes, and filling and compacting the connected bolt holes by using grouting materials; the prefabricated staircase can be prepared;
and manufacturing compression proof test blocks under the same conditions in each production batch, testing, curing the cube standard test piece with the side length of 20cm, and measuring the standard value of the compression proof ultimate strength of 35.1N/mm2 by using a standard test method in the age of 28 days.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The prefabricated staircase is characterized by being composed of cement, mineral powder, ceramsite, fine aggregate, coarse aggregate, furnace slag, a water reducer and water, wherein the prefabricated staircase comprises the following components in parts by mass: mineral powder: ceramsite: fine aggregate: coarse aggregate: slag: water reducing agent: water = (300-) = (500): (50-150): (200-300)(200-400): (300-500): (200-400): (8-15): (160-190).
2. The prefabricated staircase of claim 1, which is prepared by the method comprising the following steps:
firstly, cleaning a mold, then coating demolding oil, installing a reinforcement cage, installing embedded parts and the like to obtain an integral mold;
secondly, sequentially adding cement, mineral powder, ceramsite, fine aggregate, coarse aggregate and slag into a stirrer according to the mass mixing ratio of the components, wherein the stirring time is 1min, then adding water and a water reducing agent into the stirrer for stirring, wherein the stirring time is 3min, and then pouring out the mixture to obtain a stirred concrete mixture;
pouring the obtained stirred concrete mixture into a finished mould, slightly vibrating, and compacting the concrete; obtaining a poured mould;
step four, coating a thin film on the concrete in the poured mould after plastering, removing the mould after the curing strength reaches 12MPa, and then putting the mould into a finished product area for moisturizing and curing for not less than 7 days; obtaining a concrete stair needing to be maintained;
fifthly, after the curing strength of the concrete stair to be cured meets the requirement, the concrete stair to be cured is conveyed to a construction site, the concrete stair is connected through bolts with reserved bolt holes, and the connected bolt holes are filled and compacted through grouting materials; the prefabricated staircase can be prepared, and finally the prefabricated staircase made of the prefabricated recycled aggregate lightweight concrete is obtained.
3. The prefabricated staircase of the fabricated recycled aggregate lightweight concrete of claim 1, which is characterized in that: the formula comprises the following components in parts by mass: mineral powder: ceramsite: fine aggregate: coarse aggregate: slag: water reducing agent: water = 485: 97: 218: 262: 398: 227: 11.7: 182.
4. the prefabricated staircase of the fabricated recycled aggregate lightweight concrete of claim 1, which is characterized in that: the cement is Portland cement or ordinary Portland cement, and the 28-day strength of the cement is not lower than 42.5 MPa.
5. The prefabricated staircase of the fabricated recycled aggregate lightweight concrete of claim 1, which is characterized in that: the mineral powder is granulated blast furnace slag powder, and the activity of the mineral powder in 28 days is not less than 95%.
6. The preparation process of the prefabricated staircase made of the fabricated recycled aggregate lightweight concrete according to the claim 1, is characterized in that: the ceramsite is crushed shale ceramsite, and the particle size length of the ceramsite is 10 mm.
7. The preparation process of the prefabricated staircase made of the fabricated recycled aggregate lightweight concrete according to the claim 1, is characterized in that: the fine aggregate is broken construction waste, has the grain size of 0-5mm, and meets the requirements of I and II types of recycled fine aggregates for concrete.
8. The preparation process of the prefabricated staircase made of the fabricated recycled aggregate lightweight concrete according to the claim 1, is characterized in that: the coarse aggregate is broken construction waste, the length of the continuous grain diameter of the coarse aggregate is 5-25mm, and the requirements of I and II types of recycled coarse aggregates for concrete are met.
9. The preparation process of the prefabricated staircase made of the fabricated recycled aggregate lightweight concrete according to the claim 1, is characterized in that: the slag is waste slag of a power plant, and the particle size length of the slag is 0-5 mm.
10. The preparation process of the prefabricated staircase made of the fabricated recycled aggregate lightweight concrete according to the claim 1, is characterized in that: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent for concrete, and the water reducing rate is 18-25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308688.9A CN111039619A (en) | 2019-12-18 | 2019-12-18 | Prefabricated staircase of assembled recycled aggregate lightweight concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308688.9A CN111039619A (en) | 2019-12-18 | 2019-12-18 | Prefabricated staircase of assembled recycled aggregate lightweight concrete |
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| Publication Number | Publication Date |
|---|---|
| CN111039619A true CN111039619A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911308688.9A Withdrawn CN111039619A (en) | 2019-12-18 | 2019-12-18 | Prefabricated staircase of assembled recycled aggregate lightweight concrete |
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| Country | Link |
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| CN (1) | CN111039619A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112776126A (en) * | 2020-12-31 | 2021-05-11 | 广州市市政工程试验检测有限公司 | Static load test pile-load concrete test block manufacturing method |
| CN113618895A (en) * | 2021-08-15 | 2021-11-09 | 娄底远大建筑工业有限公司 | Production process of concrete prefabricated staircase |
| CN113699941A (en) * | 2021-09-30 | 2021-11-26 | 同济大学 | Assembly type regenerated waterproof concrete drainage channel mechanism, manufacturing method and application |
-
2019
- 2019-12-18 CN CN201911308688.9A patent/CN111039619A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112776126A (en) * | 2020-12-31 | 2021-05-11 | 广州市市政工程试验检测有限公司 | Static load test pile-load concrete test block manufacturing method |
| CN113618895A (en) * | 2021-08-15 | 2021-11-09 | 娄底远大建筑工业有限公司 | Production process of concrete prefabricated staircase |
| CN113699941A (en) * | 2021-09-30 | 2021-11-26 | 同济大学 | Assembly type regenerated waterproof concrete drainage channel mechanism, manufacturing method and application |
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Application publication date: 20200421 |
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