CN117656208A - Dry and hard recycled concrete member and forming method thereof - Google Patents
Dry and hard recycled concrete member and forming method thereof Download PDFInfo
- Publication number
- CN117656208A CN117656208A CN202311750127.0A CN202311750127A CN117656208A CN 117656208 A CN117656208 A CN 117656208A CN 202311750127 A CN202311750127 A CN 202311750127A CN 117656208 A CN117656208 A CN 117656208A
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- Prior art keywords
- dry
- recycled concrete
- hard
- concrete member
- compaction
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- 239000004567 concrete Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005056 compaction Methods 0.000 claims abstract description 29
- 239000004568 cement Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000012615 aggregate Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 6
- SHGAZHPCJJPHSC-YCNIQYBTSA-N all-trans-retinoic acid Chemical compound OC(=O)\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C SHGAZHPCJJPHSC-YCNIQYBTSA-N 0.000 claims 1
- 229960001727 tretinoin Drugs 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 238000007790 scraping Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011449 brick Substances 0.000 description 4
- 239000006082 mold release agent Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 241000607598 Vibrio Species 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/006—Pressing by atmospheric pressure, as a result of vacuum generation or by gas or liquid pressure acting directly upon the material, e.g. jets of compressed air
-
- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/388—Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to the technical field of building materials, in particular to a dry and hard recycled concrete member and a forming method thereof. The forming method of the dry and hard recycled concrete member comprises the following steps: and pouring the dry and hard recycled concrete into a mould sprayed with a release agent in a layered manner, compacting, vibrating under negative pressure, then scraping with a material, maintaining, and demoulding to obtain the dry and hard recycled concrete member. The method of the invention firstly accelerates the sinking compaction and liquefaction of the dry and hard concrete through the compaction table compaction, not only can accelerate the charging speed of the recycled concrete, but also can ensure the smooth compaction of the outer surface of the small-sized component, then compacts the inside of the component through negative pressure vibration, and utilizes negative pressure to accelerate the discharge of bubbles in the component so as to accelerate the compaction of the inside of the recycled concrete.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a dry and hard recycled concrete member and a forming method thereof.
Background
The production of the traditional small-sized concrete component adopts premixed traditional concrete, the premixed traditional concrete is poured into a die on a compaction table through a distributing device, the concrete is scraped to be flat after compaction, and the traditional small-sized component (such as a curb, an isolation pier, a cover plate and the like) can be obtained after curing is completed.
The dry and hard recycled concrete with low cement ratio has larger consistency and viscosity and difficult molding, the appearance, strength durability and other qualities of the product cannot be guaranteed by the traditional molding mode, specifically, the dry and hard recycled concrete has poor fluidity, the vibration molding method of the traditional concrete cannot meet the integral compaction effect of small components, the recycled fine aggregate has higher mud content and higher viscosity under the condition of low cement ratio, and the discharge of internal bubbles is seriously influenced; meanwhile, the regenerated coarse aggregate has rough surface, more pores and stronger adsorptivity to bubbles, internal bubbles are difficult to discharge through compaction, the internal compaction is difficult to be carried out by adopting the compaction process of the traditional wet concrete, and the formed member has low strength and does not meet the use requirement.
Most of the existing dry and hard concrete forming components are formed by mechanical vibration and compression, but the method has the defects of larger investment of equipment in the early stage, higher die cost and inflexible production. Meanwhile, since the mechanical vibration press molding is dry molding, the water addition amount is small, the surface of the production member is rough, and the durability is also deteriorated due to insufficient compactness for the recycled aggregate.
In view of this, the present invention has been made.
Disclosure of Invention
The first object of the present invention is to provide a method for forming a dry and hard recycled concrete member, which can densify the inside of the dry and hard recycled concrete, and which is smooth and beautiful in the surface of the formed member and high in strength.
A second object of the present invention is to provide a dry and hard recycled concrete member, which is produced by the method for molding a dry and hard recycled concrete member as described above.
In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:
a molding method of a dry and hard recycled concrete member comprises the following steps:
and pouring the dry and hard recycled concrete into a mould sprayed with a release agent in a layered manner, compacting, vibrating under negative pressure, demoulding, and curing to obtain the dry and hard recycled concrete member.
Preferably, the slump of the dry and hard recycled concrete is less than 10mm and the Vibrio consistency is 17-21s.
Preferably, the release agent is an aqueous release agent.
Preferably, the power of the tap is 3-4 kw, and the frequency of the tap is 40-50 Hz.
Preferably, the compaction time is 60-90 s for each layer.
Preferably, the vibrating power of the negative pressure vibration is 1-2 kw, and the vibrating time of the negative pressure vibration is 60-90 s for each layer of vibration.
Preferably, the pressure of the negative pressure vibration is 40-60 kPa.
Preferably, the dry and hard recycled concrete is formed by mixing recycled aggregate, cement and water, wherein the mass percentage of the recycled aggregate is 70-75%, the mass percentage of the cement is 15-20%, and the balance is water.
Preferably, the curing is standard curing, and the standard curing condition is that the temperature is 20+/-2 ℃ and the humidity is more than or equal to 95%.
A dry and hard recycled concrete member is prepared by the forming method of the dry and hard recycled concrete member, and the member meets the C30 requirement.
Compared with the prior art, the invention has the beneficial effects that:
(1) The method of the invention firstly accelerates the sinking compaction and liquefaction of the dry and hard concrete through the compaction table compaction, can accelerate the charging speed of the recycled concrete, can ensure the smooth compaction of the outer surface of the small-sized component, then compacts the inside of the component through negative pressure vibration, and accelerates the compaction of the inside of the recycled concrete by utilizing the negative pressure to accelerate the discharge of bubbles in the component.
Detailed Description
The technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present invention, and are intended to be illustrative only and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The first aspect of the present invention provides a method for forming a dry and hard recycled concrete member, comprising the steps of:
and pouring the dry and hard recycled concrete into a mould sprayed with a release agent in a layered manner, vibrating the mould, then scraping the mould by using a material supplement after negative pressure vibration, demoulding and curing to obtain the dry and hard recycled concrete member.
The dry and hard recycled concrete has low water-cement ratio, poor fluidity and difficult molding, the appearance, strength, durability and other qualities of the product cannot be guaranteed by a traditional vibration molding mode, the recycled fine aggregate has higher mud content, the viscosity is higher under the condition of low water-cement ratio, the discharge of internal bubbles is seriously influenced, and meanwhile, the surface of the recycled coarse aggregate is rough, the pores are more, the adsorptivity to the bubbles is stronger, so that the internal bubbles are difficult to discharge; the method of the invention aims at the problems that the compaction of the compaction table accelerates the sinking compaction and liquefaction of the dry and hard concrete, can accelerate the charging speed of the recycled concrete, can ensure the smooth compaction of the outer surface of a small-sized component, then uses negative pressure vibration to compact the inside of the component, and simultaneously utilizes negative pressure to accelerate the discharge of air bubbles in the component, thereby accelerating the compaction of the inside of the recycled concrete.
In some specific embodiments of the invention, the material is fed and scraped off after negative pressure vibration, and the coating is naturally cured for 18-24 hours and then is demoulded.
In some embodiments of the invention, the dry and hard recycled concrete has a slump of less than 10mm and a Vibrio consistency of 17-21s.
In some embodiments of the invention, the release agent is an aqueous release agent.
The dry and hard recycled concrete has more bubbles in the forming process, the aqueous release agent contains an emulsifier, and organic components are dispersed, so that the contact angle and the polarity of the aqueous release agent are both larger than those of the oily release agent, and the discharge of surface bubbles can be accelerated; as an example, the aqueous mold release agent is a brookfield XB-2610 aqueous mold release agent or a japanese aqua regia aqueous mold release agent.
In some embodiments of the invention, the tap is a range of values consisting of any point value or any two point values of 3 to 4kw, for example 3kw, 3.2kw, 3.4kw, 3.5kw, 3.6kw, 3.8kw, 4kw, based on common tap parameters of wet forming; the frequency of the tap is 40-50 Hz, such as any point value or any range value composed of any two point values of 40Hz, 42Hz, 44Hz, 45Hz, 46Hz, 48Hz and 50Hz.
In some embodiments of the invention, the tapping time is 60-90 s, such as any one or a range of two of 60s, 65s, 70s, 75s, 80s, 85s, 90s, of each layer.
In some embodiments of the present invention, the vibrating power of the negative pressure vibration is 1-2 kw, for example, any point value or any range value composed of any two point values in 1kw, 1.2kw, 1.4kw, 1.5kw, 1.6kw, 1.8kw, 2kw, and the vibrating time of the negative pressure vibration is 60-90 s, for example, any point value or range value composed of any two point values in 60s, 65s, 70s, 75s, 80s, 85s, 90s, the vibrating power is too small or the vibrating time is too short and is not compact enough, the vibrating power is too large or the vibrating time is too long, which can cause segregation, affect the quality of the component, and therefore the power and time of the negative pressure vibration need to be reasonably controlled.
In some embodiments of the present invention, the internal air pressure of the negative pressure vibration is 40 to 60kPa ， For example, the negative pressure can accelerate the removal of bubbles in the recycled concrete, improve the compactness in the recycled concrete member, improve the strength of the member, and influence the removal effect of the bubbles by the magnitude of the negative pressure, and the negative pressure range needs to be reasonably controlled, wherein the negative pressure is any one point value or any two point values in 40kPa, 45kPa, 50kPa, 55kPa and 60kPa.
In some embodiments of the present invention, the dry and hard recycled concrete is formed by mixing recycled aggregate, cement and water, wherein the mass percentage of the recycled aggregate is 70% -75%, such as any point value or any range value composed of any two point values of 70%, 71%, 72%, 73%, 74%, 75%; the mass percentage of the cement is 15% -20%, for example, any point value or any range value formed by two point values in 15%, 16%, 17%, 18%, 19% and 20%; the balance being water, the amount of water added being based on the Vibrio consistencyAdjustment of ， As an example, the recycled aggregate is a concrete recycled aggregate meeting the requirements of grade iii recycled aggregate.
As an example, the cement is ordinary portland cement with a strength grade of p.o42.5, the cement has a function of ensuring strength, and a decrease in the amount of cement leads to a decrease in strength, an increase in the amount of cement is not significant, and at the same time, the cost is increased, so that it is necessary to control the amount of cement within a proper range.
In some embodiments of the invention, the curing is standard curing, and the standard curing condition is that the temperature is 20+/-2 ℃ and the humidity is more than or equal to 95%.
A second aspect of the present invention provides a dry and hard recycled concrete member, manufactured by the method for forming a dry and hard recycled concrete member according to any one of the preceding embodiments, said member meeting the C30 requirement.
The dry and hard recycled concrete member provided by the invention has compact inside, smooth surface and high strength, and meets the C30 standard.
Some embodiments of the present invention will be described in detail below with reference to specific examples, wherein the starting materials used are commercially available, unless otherwise specified.
Example 1
Taking 1500 parts of III-grade concrete recycled aggregate, 350 parts of P.O42.5 cement and 200 parts of mixing water, and stirring by a forced stirrer to obtain uniform dry and hard recycled concrete, wherein the slump is less than 10mm, the slump index is not applicable, and the View consistency is 20s.
The method comprises the steps of taking a curb plastic mold, spraying a water-based release agent at the stream side XB-2610, placing the mold on a 3kw vibrating table, pouring the dry and hard recycled concrete into two layers, taking a negative pressure vibrator to assist in vibrating the inside of the structure center of the mold to be uniform, enabling negative pressure vibration and vibrating of the vibrating table to be carried out synchronously, enabling the vibrating frequency to be 45Hz, enabling the vibrating power of the negative pressure vibration to be 1.5kw, enabling the vibrating time of each layer to be 60s, and enabling the internal air pressure of the negative pressure vibration to be 50kPa. After the molding is finished, the upper part is scraped, and the coating is naturally maintained for 24 hours ， Demolding to obtain the product with smooth and dense surfaceCarrying out standard curing on a raw curb sample for 28 days; the standard curing temperature was 20℃and the air humidity was 95%.
The compressive strength measured in 28 days is 35.4MPa, and the requirement of C30 is met.
Comparative example 1
Comparative example 1 is similar to example 1, except that: the release agent was engine oil (oily release agent), and the other conditions were the same as in example 1.
After demolding, obvious air bubbles are reserved on the surface of the sample, and the oily mold release agent has no obvious influence on the 28-day compressive strength, but has poor appearance.
Comparative example 2
Comparative example 2 recycled concrete was prepared by conventional wet forming, the amount of mixing water was adjusted to 300 parts, the cement ratio was increased, slump was measured to be 160mm after uniform stirring by a forced mixer, the mold for spraying the release agent was directly placed on a compaction table, the recycled concrete was poured in layers for compaction without negative pressure vibration, and the other conditions were the same as in example 1.
The appearance after demolding is good, the compressive strength measured in 28 days is 24.1MPa, and the requirement of the curb strength is not met.
Comparative example 3
Comparative example 3 is similar to example 1 except that no negative pressure vibration is performed, and the other conditions are the same as example 1.
In the vibration process, the thickness of the vibration liquefaction is only 5-7mm, the inside is still in a rough accumulation state, the inside is loose after demolding, the impact resistance and the durability are obviously poor, the compressive strength measured in 28 days is 17.4MPa, and the strength requirement of the curb is not met.
Comparative example 4
The prepared dry and hard recycled concrete is molded on a brick making machine, the brick making machine is a solid Feng five-type machine, and the molding height can only mold the plain stone with the height of 200 mm. Preparing dry and hard recycled concrete: the amount of mixing water was adjusted to 160 parts and the remaining components and formulation were the same as in example 1, with a drier profile than in example 1. A plain margin stone sample is obtained after molding by a brick making machine under vibration pressure (50 Hz,3 s), and curing conditions are the same as in example 1.
The compressive strength measured in 28 days is 38.5MPa, and the requirement of C30 is met. But the side surface has obvious granular feel and poor appearance.
Comparative example 5
The preparation process of the dry and hard recycled concrete in comparative example 5 was the same as that of example 1, and the molding method and curing conditions were the same as those of comparative example 4.
Deformation occurs after vibration press molding and demolding by a brick making machine, and the side wall is compact and smooth due to the slightly high water content, but the side wall bulges and deforms and cannot be used.
Comparative example 6
Comparative example 6 was different from example 1 in that the molding was performed by compaction with a compaction table and normal pressure vibration, and the other conditions were the same as example 1. It is obvious that the internal bubbles are difficult to be discharged because the regenerated concrete slurry is sticky in the normal pressure vibrating process.
The compressive strength measured for 28 days was 31.6MPa, which also meets the C30 requirement, but is significantly lower than in example 1.
While the invention has been illustrated and described with reference to specific embodiments, it is to be understood that the above embodiments are merely illustrative of the technical aspects of the invention and not restrictive thereof; those of ordinary skill in the art will appreciate that: modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some or all of the technical features thereof, without departing from the spirit and scope of the present invention; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions; it is therefore intended to cover in the appended claims all such alternatives and modifications as fall within the scope of the invention.
Claims (10)
1. The forming method of the dry and hard recycled concrete member is characterized by comprising the following steps of:
and pouring the dry and hard recycled concrete into a mould sprayed with a release agent in a layered manner, compacting, vibrating under negative pressure, demoulding, and curing to obtain the dry and hard recycled concrete member.
2. The method of forming a dry and hard recycled concrete member according to claim 1, wherein the dry and hard recycled concrete has a slump of less than 10mm and a tretinoin of 17-21s.
3. The method of forming a dry and hard recycled concrete member according to claim 1, wherein the release agent is an aqueous release agent.
4. The method of forming a dry and hard recycled concrete member according to claim 1, wherein the power of the compaction is 3 to 4kw and the frequency of the compaction is 40 to 50Hz.
5. The method of forming a dry and hard recycled concrete member according to claim 1, wherein the compaction time is 60 to 90 seconds per layer.
6. The method for forming a dry and hard recycled concrete member according to claim 1, wherein the vibrating power of the negative pressure vibration is 1-2 kw, and the vibrating time of the negative pressure vibration is 60-90 s per layer.
7. The method of forming a dry and hard recycled concrete member according to claim 1, wherein the internal air pressure of the negative pressure vibration is 40 to 60kPa.
8. The method for forming a dry and hard recycled concrete member according to claim 1, wherein the dry and hard recycled concrete is formed by mixing recycled aggregate, cement and water, the mass percentage of the recycled aggregate is 70% -75%, the mass percentage of the cement is 15% -20%, and the balance is water.
9. The method for forming a dry and hard recycled concrete member according to claim 1, wherein the curing is standard curing, and the standard curing condition is that the temperature is 20±2 ℃ and the humidity is not less than 95%.
10. A dry and hard recycled concrete member, characterized in that it is produced by the method for forming a dry and hard recycled concrete member according to any one of claims 1 to 9, said member satisfying the C30 requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311750127.0A CN117656208A (en) | 2023-12-19 | 2023-12-19 | Dry and hard recycled concrete member and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311750127.0A CN117656208A (en) | 2023-12-19 | 2023-12-19 | Dry and hard recycled concrete member and forming method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117656208A true CN117656208A (en) | 2024-03-08 |
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ID=90082557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311750127.0A Pending CN117656208A (en) | 2023-12-19 | 2023-12-19 | Dry and hard recycled concrete member and forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117656208A (en) |
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2023
- 2023-12-19 CN CN202311750127.0A patent/CN117656208A/en active Pending
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