CN114804806A - Production process for preparing recycled building material from building waste - Google Patents
Production process for preparing recycled building material from building waste Download PDFInfo
- Publication number
- CN114804806A CN114804806A CN202210468413.7A CN202210468413A CN114804806A CN 114804806 A CN114804806 A CN 114804806A CN 202210468413 A CN202210468413 A CN 202210468413A CN 114804806 A CN114804806 A CN 114804806A
- Authority
- CN
- China
- Prior art keywords
- building material
- recycled
- regenerated
- parts
- aggregate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 34
- 239000004566 building material Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000003607 modifier Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 238000007885 magnetic separation Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 4
- 244000060011 Cocos nucifera Species 0.000 claims description 4
- 229920001732 Lignosulfonate Polymers 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical class O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000004035 construction material Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000010455 vermiculite Substances 0.000 claims description 4
- 229910052902 vermiculite Inorganic materials 0.000 claims description 4
- 235000019354 vermiculite Nutrition 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 5
- 238000012216 screening Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- -1 performing sorting Substances 0.000 description 1
- 239000010865 sewage Substances 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- 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
Abstract
The invention relates to the technical field of building material recycling, in particular to a production process for preparing a regenerated building material from building garbage, which comprises the following steps: the method comprises the steps of regulating various pollution-free and water-free wet building wastes to obtain raw materials, putting the raw materials into a jaw crusher for crushing treatment to obtain aggregates, removing metal substances and combustible substances in the aggregates to obtain regenerated aggregates, putting the regenerated aggregates into a closed container, introducing high-temperature steam for curing, adding a modifier for high-speed mixing to obtain modified regenerated aggregates, drying the modified regenerated aggregates, and cooling to obtain the finished product of the regenerated building material. The invention ensures that the regenerated building material has lower crushing value index by steam curing and modification, effectively improves the concrete strength and the anti-deformation capability, has better porosity, water absorption and apparent density, and improves the overall performance of the regenerated building material to the maximum extent.
Description
Technical Field
The invention relates to the technical field of building material recycling, in particular to a production process for preparing a regenerated building material from building garbage.
Background
Along with the development of society, urban buildings grow like bamboo shoots in spring after raining, the original buildings need to be dismantled in the process, the original buildings contain a large amount of waste garbage, and the waste garbage can cause environmental pollution and land occupation, so how to utilize the increasing amount of building wastes becomes an important problem of urban sustainable development, and a feedback method is adopted for building waste treatment at present to be used for preparing building materials again.
Through retrieval, Chinese patent 202010218537.0 discloses a method for preparing recycled aggregate by using construction waste, which comprises the steps of pre-crushing and pre-screening the construction waste to obtain waste solid materials, primarily crushing the waste solid materials, performing sorting, impurity removal and vibration screening to obtain primary recycled aggregate and crushed materials, and secondarily crushing and vibrating screening the primary recycled aggregate to obtain secondary materials and crushed materials; the secondary material is put into a closed container, and is heated by introducing steam, and then coarse recycled aggregate and fine recycled aggregate are obtained by grinding, screening and winnowing, and the method is convenient for removing cement mortar at the smooth part and the sunken part of the surface of the recycled aggregate, so that the integral removal rate of the cement mortar on the surface of the recycled aggregate is improved; the heat diffusion effect of heating by using the steam is good, and the subsequent sewage treatment problem does not exist. However, the recycled aggregate prepared by the method has poor performance and is fragile, and the apparent density of the aggregate is seriously influenced. Accordingly, one skilled in the art provides a production process for preparing recycled building materials from construction wastes to solve the problems set forth in the background art.
Disclosure of Invention
The invention aims to provide a production process for preparing a recycled building material from building wastes, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a production process for preparing a regenerated building material from building wastes comprises the following steps:
s1: regulating various pollution-free and water-free wet construction wastes to obtain raw materials for preparing a regenerated construction material;
s2: placing the raw materials into a jaw crusher to be crushed to obtain aggregate with the thickness of 0-5 mm;
s3: removing metal substances and combustible substances in the aggregate to obtain recycled aggregate;
s4: placing the recycled aggregate into a closed container, and introducing high-temperature steam for curing;
s5: placing the cured recycled aggregate into a modifier for high-speed mixing, and standing for 1-2h after mixing to obtain modified recycled aggregate;
s6: and drying the modified recycled aggregate, and cooling to obtain the finished recycled building material.
As a further aspect of the invention: the construction waste in S1 includes waste concrete, clay bricks, glass blocks, and ceramic blocks.
As a further aspect of the invention: in S3, the metal is removed by magnetic separation equipment, the magnetic field intensity of the magnetic separation equipment is 1200-1300GS, the rotating speed is 45-55r/min, the combustible is removed by a calcination method, and the calcination temperature is 1000-1200 ℃.
As a further aspect of the invention: the pressure in the closed container is kept at 1.5-1.8Mpa, the temperature of the introduced steam is 220-250 ℃, and the curing time is 3-6 h.
As a further aspect of the invention: the proportion of the modifier to the recycled aggregate in S5 is 3: 1, the modifier is prepared by mixing and dispersing the following materials in parts by weight: 20-25 parts of coconut shell ash, 10-15 parts of vermiculite micropowder, 10-20 parts of silica gel liquid, 3-5 parts of water reducing agent, 5-10 parts of modified bentonite and 40-45 parts of water.
As a further aspect of the invention: the water reducing agent adopts lignosulfonate.
As a further aspect of the invention: the drying temperature in S6 is 150-180 ℃, and the drying time is 25-30 min.
Compared with the prior art, the invention has the beneficial effects that: the invention ensures that the regenerated building material has lower crushing value index by steam curing and modification, effectively improves the concrete strength and the anti-deformation capability, has better porosity, water absorption and apparent density, and improves the overall performance of the regenerated building material to the maximum extent.
Detailed Description
Example 1
In the embodiment of the invention, the production process for preparing the recycled building material from the building waste comprises the following steps:
s1: regulating various pollution-free and water-free wet construction wastes to obtain raw materials for preparing a regenerated construction material;
s2: putting the raw materials into a jaw crusher for crushing treatment to obtain 2.8mm aggregate;
s3: removing metal substances and combustible substances in the aggregate to obtain recycled aggregate;
s4: placing the recycled aggregate into a closed container, and introducing high-temperature steam for curing;
s5: placing the cured recycled aggregate into a modifier for high-speed mixing, and standing for 2 hours after mixing to obtain modified recycled aggregate;
s6: and drying the modified recycled aggregate, and cooling to obtain the finished recycled building material.
Further, the construction waste in S1 includes waste concrete, clay bricks, glass blocks, and ceramic blocks.
Further, in S3, metal substances are removed by using magnetic separation equipment, the magnetic field intensity of the magnetic separation equipment is 1300GS, the rotating speed is 55r/min, combustible substances are removed by using a calcination method, and the calcination temperature is 1200 ℃.
Further, the pressure in the closed container is kept at 1.8Mpa, the temperature of the introduced steam is 250 ℃, and the curing time is 4 hours.
Further, the ratio of the modifier to the recycled aggregate in S5 is 3: 1, the modifier is prepared by mixing and dispersing the following materials in parts by weight: 25 parts of coconut shell ash, 15 parts of vermiculite micropowder, 20 parts of silica gel liquid, 5 parts of water reducing agent, 10 parts of modified bentonite and 45 parts of water.
Further, the water reducing agent adopts lignosulfonate.
Further, the drying temperature in S6 was 180 ℃ and the drying time was 30 min.
Example 2
In this embodiment, a production process for preparing a recycled building material from building waste includes the following steps:
s1: regulating various pollution-free and water-free wet construction wastes to obtain raw materials for preparing a regenerated construction material;
s2: putting the raw materials into a jaw crusher for crushing treatment to obtain 4mm aggregate;
s3: removing metal substances and combustible substances in the aggregate to obtain recycled aggregate;
s4: placing the recycled aggregate into a closed container, and introducing high-temperature steam for curing;
s5: placing the cured recycled aggregate into a modifier for high-speed mixing, and standing for 1h after mixing to obtain modified recycled aggregate;
s6: and drying the modified recycled aggregate, and cooling to obtain the finished recycled building material.
Further, the construction waste in S1 includes waste concrete, clay bricks, glass blocks, and ceramic blocks.
Further, in S3, metal substances are removed by using magnetic separation equipment, the magnetic field intensity of the magnetic separation equipment is 1200GS, the rotating speed is 45r/min, combustible substances are removed by using a calcination method, and the calcination temperature is 1000 ℃.
Further, the pressure in the closed container is kept at 1.5Mpa, the temperature of the introduced steam is 220 ℃, and the curing time is 3 hours.
Further, the ratio of the modifier to the recycled aggregate in S5 is 3: 1, the modifier is prepared by mixing and dispersing the following materials in parts by weight: 20 parts of coconut shell ash, 10 parts of vermiculite micropowder, 10 parts of silica gel liquid, 3 parts of water reducing agent, 5 parts of modified bentonite and 40 parts of water.
Further, the water reducing agent adopts lignosulfonate.
Further, the drying temperature in S6 was 150 ℃ and the drying time was 25 min.
Test example
And (3) testing groups: example 1, example 2, comparative example (same type of product on the market);
the test contents are as follows: the finished products obtained from example 1, example 2 and the comparison document are inspected and tested for porosity, water absorption, crush value index and apparent density:
and (3) testing results:
| item | Apparent density% | Crush value index% | Porosity% | Water absorption% |
| Example 1 | 2731 | 7 | 42 | 1.29 |
| Example 2 | 1694 | 8 | 44 | 1.33 |
| Comparative example | 2438 | 15 | 56 | 6.8 |
According to the test results, the indexes of the concrete recycled aggregate GB/T25177-2010 in the embodiment 1 and the embodiment 2 of the invention reach and are superior to the I standard specified in the concrete recycled aggregate GB/T25177-2010, while the comparative example can only reach the II standard.
In summary, the following steps: the invention ensures that the regenerated building material has lower crushing value index by steam curing and modification, effectively improves the concrete strength and the anti-deformation capability, has better porosity, water absorption and apparent density, and improves the overall performance of the regenerated building material to the maximum extent.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (7)
1. A production process for preparing a recycled building material from building wastes is characterized by comprising the following steps:
s1: regulating various pollution-free and water-free wet construction wastes to obtain raw materials for preparing a regenerated construction material;
s2: placing the raw materials into a jaw crusher to be crushed to obtain aggregate with the thickness of 0-5 mm;
s3: removing metal substances and combustible substances in the aggregate to obtain recycled aggregate;
s4: placing the recycled aggregate into a closed container, and introducing high-temperature steam for curing;
s5: placing the cured recycled aggregate into a modifier for high-speed mixing, and standing for 1-2h after mixing to obtain modified recycled aggregate;
s6: and drying the modified recycled aggregate, and cooling to obtain the finished recycled building material.
2. The process of claim 1, wherein the construction waste at S1 comprises waste concrete, clay bricks, glass blocks and ceramic blocks.
3. The process for producing recycled building materials from construction wastes as claimed in claim 1, wherein the metal in S3 is removed by magnetic separation equipment, the magnetic field intensity of the magnetic separation equipment is 1200-1300GS at a rotation speed of 45-55r/min, and the combustible is removed by calcination at a temperature of 1000-1200 ℃.
4. The process for producing recycled building materials from construction wastes as claimed in claim 1, wherein the pressure in the closed vessel is maintained at 1.5-1.8MPa, the temperature of the introduced steam is 220-250 ℃, and the curing time is 3-6 h.
5. The process for producing recycled building materials from construction wastes according to claim 1, wherein the ratio of the modifier to the recycled aggregate in S5 is 3: 1, the modifier is prepared by mixing and dispersing the following materials in parts by weight: 20-25 parts of coconut shell ash, 10-15 parts of vermiculite micropowder, 10-20 parts of silica gel liquid, 3-5 parts of water reducing agent, 5-10 parts of modified bentonite and 40-45 parts of water.
6. The production process for preparing the recycled building material from the construction wastes according to claim 5, wherein the water reducing agent is lignosulfonate.
7. The process for preparing recycled building material from construction waste as claimed in claim 1, wherein the drying temperature in S6 is 150-180 deg.C, and the drying time is 25-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468413.7A CN114804806A (en) | 2022-04-29 | 2022-04-29 | Production process for preparing recycled building material from building waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468413.7A CN114804806A (en) | 2022-04-29 | 2022-04-29 | Production process for preparing recycled building material from building waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114804806A true CN114804806A (en) | 2022-07-29 |
Family
ID=82509278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210468413.7A Pending CN114804806A (en) | 2022-04-29 | 2022-04-29 | Production process for preparing recycled building material from building waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114804806A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116759034A (en) * | 2023-08-21 | 2023-09-15 | 中铁九局集团第五工程有限公司 | Pervious concrete mix proportion design method based on wrapping thickness |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10139506A (en) * | 1996-10-31 | 1998-05-26 | Ohbayashi Corp | Method for reforming regenerated coarse aggregate |
| JP2002087857A (en) * | 2000-09-18 | 2002-03-27 | Takenaka Komuten Co Ltd | Production process of recycled aggregate |
| CN110357472A (en) * | 2019-08-13 | 2019-10-22 | 广东新瑞龙生态建材有限公司 | A kind of technique that building waste prepares regenerated coarse aggregate |
| CN110668840A (en) * | 2019-09-26 | 2020-01-10 | 李健 | Rapid forming method for concrete building block |
| CN111318550A (en) * | 2020-03-25 | 2020-06-23 | 深圳绿景环保再生资源有限公司 | Method for preparing recycled aggregate by using construction waste |
| KR102190425B1 (en) * | 2020-06-15 | 2020-12-11 | 주식회사 가우 | Recycling aggregate with excellent long-term storage and recycling performance and treatment method thereof |
-
2022
- 2022-04-29 CN CN202210468413.7A patent/CN114804806A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10139506A (en) * | 1996-10-31 | 1998-05-26 | Ohbayashi Corp | Method for reforming regenerated coarse aggregate |
| JP2002087857A (en) * | 2000-09-18 | 2002-03-27 | Takenaka Komuten Co Ltd | Production process of recycled aggregate |
| CN110357472A (en) * | 2019-08-13 | 2019-10-22 | 广东新瑞龙生态建材有限公司 | A kind of technique that building waste prepares regenerated coarse aggregate |
| CN110668840A (en) * | 2019-09-26 | 2020-01-10 | 李健 | Rapid forming method for concrete building block |
| CN111318550A (en) * | 2020-03-25 | 2020-06-23 | 深圳绿景环保再生资源有限公司 | Method for preparing recycled aggregate by using construction waste |
| KR102190425B1 (en) * | 2020-06-15 | 2020-12-11 | 주식회사 가우 | Recycling aggregate with excellent long-term storage and recycling performance and treatment method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 石峰等: "建筑固体废物资源化综合利用", 《水资源与水工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116759034A (en) * | 2023-08-21 | 2023-09-15 | 中铁九局集团第五工程有限公司 | Pervious concrete mix proportion design method based on wrapping thickness |
| CN116759034B (en) * | 2023-08-21 | 2023-11-10 | 中铁九局集团第五工程有限公司 | Pervious concrete mix proportion design method based on wrapping thickness |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107814530B (en) | High-strength recycled concrete porous brick | |
| CN110255983B (en) | Recycled concrete and preparation method thereof | |
| CN112028564B (en) | By using CO2Recycled concrete block prepared from reinforced recycled powder | |
| WO2022062493A1 (en) | Building waste burn-free regeneration brick and preparation method thereof | |
| CN110510947B (en) | Method for preparing high-doping-amount low-quality ore-doped regenerated cement-based product through microwave curing | |
| CN111393057B (en) | Regeneration method of waste concrete and modified regenerated concrete | |
| CN109320169B (en) | Anti-cracking cement pipe pile for photovoltaic and preparation method thereof | |
| CN107032683A (en) | A kind of energy-saving environment protection brick and preparation method | |
| CN111170669A (en) | Artificial recycled aggregate prepared from engineering waste soil and preparation method thereof | |
| CN110922143A (en) | Biomass aggregate recycled concrete and preparation method thereof | |
| CN110655338A (en) | Copper slag-based cementing material, preparation method and application | |
| CN114804806A (en) | Production process for preparing recycled building material from building waste | |
| CN112142400A (en) | Concrete with steel slag and waste rubber as fine aggregate and application thereof | |
| CN111018416A (en) | Method for modifying performance of coal ash-based geopolymer by ultrasonic waves | |
| CN110627464A (en) | Manufacturing process of granite powder autoclaved aerated concrete | |
| CN113548862A (en) | Autoclaved aerated concrete block prepared from incineration fly ash and building waste and preparation method thereof | |
| CN113233859B (en) | Modified bamboo fiber reinforced aerated concrete and preparation method thereof | |
| CN115304356A (en) | High-strength construction waste recycled brick and preparation method thereof | |
| CN112047654B (en) | Method for reinforcing recycled fine aggregate by using bacillus pasteurii DSM33 | |
| CN114853414A (en) | Method for preparing autoclaved aerated concrete block by taking blast furnace slag-gold tailings as raw material | |
| CN114580200A (en) | Design method of high-performance recycled aggregate pervious concrete | |
| CN109650945B (en) | Stone saw mud self-hardening aerated concrete double-layer building block and preparation method thereof | |
| CN113563037A (en) | Aerated concrete block prepared by replacing part of ground fine sand with waste ceramic polishing sludge and preparation method thereof | |
| CN108546076B (en) | Artificial stone with excellent weather resistance and function and preparation method thereof | |
| CN108086576B (en) | Method for preparing light aggregate concrete small hollow building block by using industrial solid waste residues |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220729 |
|
| RJ01 | Rejection of invention patent application after publication |