CN109160791A - A kind of recycled fine aggregate High-strength self-compaction concrete - Google Patents
A kind of recycled fine aggregate High-strength self-compaction concrete Download PDFInfo
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- CN109160791A CN109160791A CN201811336247.5A CN201811336247A CN109160791A CN 109160791 A CN109160791 A CN 109160791A CN 201811336247 A CN201811336247 A CN 201811336247A CN 109160791 A CN109160791 A CN 109160791A
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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of recycled fine aggregate High-strength self-compaction concretes, including following raw material: portland cement, slag, silicon powder, recycled fine aggregate, natural aggregate, water, polycarboxylate water-reducer, thickener, fiber；Its production method stirs 1min the following steps are included: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously, soak it sufficiently, then thickener, fiber and poly- hydroxy acid water-reducing agent is added and stirs 5~8min, it mixes them thoroughly dispersion and obtains the mixture A of pulpous state, then 3~5min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate is then added, stirs 10min, finished product.The overall mechanical properties of gained concrete of the invention are significantly improved, recycled fine aggregate is produced using discarded building waste, resource is recycled, while agricultural crop straw is made full use of, the living environment of the mankind, environmental protection and energy saving are improved while having saved raw material.
Description
Technical field
The present invention relates to concrete configuration technical field more particularly to a kind of recycled fine aggregate High-strength self-compaction concretes.
Background technique
With the high stratification of modern architecture, the development trend greatly across change, lightweight, underground and use environment harshization,
Requirement of the concrete used in modern construction engineering to its intensity and durability is also higher and higher.Due to modern concrete work
Journey constantly develops to scale and complication direction, and arrangement of reinforcement becomes increasingly complex dense in concrete bodies, pours difficulty and becomes larger, vibrates
Difficulty causes construction quality to be difficult to ensure.For the reinforcing engineering etc. of existed building, bridge, even more it is difficult to use normal concrete
Carry out normal construction.Under this engineering background, green construction performance, synthesized environmental protection performance and the good power of self-compacting concrete
And endurance quality, use it largely in a variety of different engineerings.
Developed and used waste concrete as recycled aggregate, on the one hand solve the processing of a large amount of discarded concretes it is difficult and
The problems such as ecological environment resulting from is worsening；On the other hand consumption of the construction industry to natural aggregate can be reduced, thus
The exploitation to fine aggregate stone is reduced, fundamentally solves natural aggregate increasingly scarcity and a large amount of Exploit sand and stones to ecological environment
Destruction problem, comprehensive benefit are significant.
Self-compacting concrete is more demanding to workability and durability, raw material and match ratio are required it is also very harsh,
The mix-design of self-compacting concrete needs to fully consider self-compacting concrete mobility, education resistance, self-filling ability, slurry
Correlation and its contradiction between body dosage and volume stability.In order to guarantee the performance of concrete, it joined various differences
The additive of performance is adjusted, and currently used concrete admixture, which can play, reduces water consumption, control setting time, is mentioned
The effects of high-durability, but the performance of additive is single, is not able to satisfy a variety of demands, it is therefore desirable to by optimum experimental formula,
The performance for improving concrete, keeps the application prospect of concrete more wide.
Summary of the invention
It is unable to satisfy the purpose of the present invention is to solve self-compacting concrete comprehensive mechanical property is poor in the prior art
The problem of requirement, and a kind of recycled fine aggregate High-strength self-compaction concrete proposed.
To achieve the goals above, present invention employs following technical solutions:
A kind of recycled fine aggregate High-strength self-compaction concrete, the raw material indicated including following weight percent:
Portland cement 20~30%；
Slag 5~8%；
Silicon powder 1~2%；
Recycled fine aggregate 25~35%；
Natural aggregate 35~45%；
Water 10~15%；
Polycarboxylate water-reducer 0.2~0.5%；
Thickener 0.1~0.2%；
Fiber 0.1~0.2%.
Preferably, the miberal powder is S95 grades of ground granulated blast furnace slags, the silicon powder density is 2400kg/m3, specific surface
Product is 15000m2/ kg, the recycled fine aggregate are that broken, shaping, screening, obtained partial size are not more than by waste and old concrete
The recycled fine aggregate particle of 4.5mm, the natural aggregate are made of fine aggregate and coarse aggregate, and wherein the fineness modulus of fine aggregate is
2.5~3.0, the partial size of coarse aggregate is 10~20mm continuous grading.
Preferably, the thickener be powdered hydroxypropyl methyl cellulose, viscosity be 200000Pa.S~
300000Pa.S, the fiber be by rice straw, wheat stalk or corn straw smashing dry etc. processing after made of,
Length is 0.8~7mm, and density is 300~450kg/m3。
A method of recycled fine aggregate High-strength self-compaction concrete is produced, is included the following steps:
S1: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously and is stirred
1min soaks it sufficiently, this step is preparation to cementitious material, cementitious material can in condensation process other cementing objects
Material, is formed with the substance of the complex solid of certain mechanical strength, significantly improves the intensity and durability degree of concrete, is then added and increases
Thick dose, fiber and poly- hydroxy acid water-reducing agent stir 5~8min, mix them thoroughly dispersion and obtain the mixture A of pulpous state；
S2: 3~5min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate, stirring is then added
10min, finished product make water-reducing agent and cementitious material be sufficiently mixed reaction, and cementitious material is made uniformly to be wrapped in coarse aggregate, thin
Aggregate surface.
Compared with prior art, the invention has the beneficial effects that:
1, present invention improves the preparation process of concrete, the use of slag and silicon powder can improve coarse aggregate and water in concrete
Interfacial transition zone between slurry body, and it is filled in ultra-fine grain in the gap of cement granules, form cementitious material good
Continuous microstage match with filling, improve the overall mechanical properties and endurance quality of concrete；
2, there is good resistance stretcher strain ability using stalk fibre, specific gravity is lighter, has self-compacting concrete integrally more tough
Property, and China has stalk resource abundant, can save vast resources, is conducive to the living environment for improving the mankind.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment one
A kind of recycled fine aggregate High-strength self-compaction concrete, the raw material indicated including following weight percent:
Portland cement 20%；
Slag 5%；
Silicon powder 1%；
Recycled fine aggregate 30%；
Natural aggregate 35%；
Water 10%；
Polycarboxylate water-reducer 0.2%；
Thickener 0.1%；
Fiber 0.1%.
Preferably, miberal powder is S95 grades of ground granulated blast furnace slags, silicon powder density is 2400kg/m3, specific surface area is
15000m2/ kg, recycled fine aggregate are broken, shaping, screening by waste and old concrete, and obtained partial size is not more than the regeneration of 4.5mm
Fine aggregate particle, natural aggregate are made of fine aggregate and coarse aggregate, and wherein the fineness modulus of fine aggregate is 2.5~3.0, thick bone
The partial size of material is 10~20mm continuous grading.
Preferably, thickener be powdered hydroxypropyl methyl cellulose, viscosity be 200000Pa.S~
300000Pa.S, fiber are the length made of after processing rice straw, wheat stalk or corn straw smashing drying etc.
For 0.8~7mm, density is 300~450kg/m3。
A method of recycled fine aggregate High-strength self-compaction concrete is produced, is included the following steps:
S1: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously and is stirred
1min soaks it sufficiently, this step is preparation to cementitious material, cementitious material can in condensation process other cementing objects
Material, is formed with the substance of the complex solid of certain mechanical strength, significantly improves the intensity and durability degree of concrete, is then added and increases
Thick dose, fiber and poly- hydroxy acid water-reducing agent stir 5min, mix them thoroughly dispersion and obtain the mixture A of pulpous state；
S2: 3min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate, stirring is then added
10min, finished product make water-reducing agent and cementitious material be sufficiently mixed reaction, and cementitious material is made uniformly to be wrapped in coarse aggregate, thin
Aggregate surface.
The concrete overall mechanical properties produced using upper raw material and step are significantly improved, and recycled fine aggregate is used
Discarded building waste is taken full advantage of, resource is recycled, while agricultural crop straw is made full use of, is saved
The living environment of the mankind, environmental protection and energy saving are improved while raw material.
Embodiment two
A kind of recycled fine aggregate High-strength self-compaction concrete, the raw material indicated including following weight percent:
Portland cement 20%；
Slag 8%；
Silicon powder 2%；
Recycled fine aggregate 25%；
Natural aggregate 35%；
Water 10%；
Polycarboxylate water-reducer 0.2%；
Thickener 0.1%；
Fiber 0.1%.
Preferably, miberal powder is S95 grades of ground granulated blast furnace slags, silicon powder density is 2400kg/m3, specific surface area is
15000m2/ kg, recycled fine aggregate are broken, shaping, screening by waste and old concrete, and obtained partial size is not more than the regeneration of 4.5mm
Fine aggregate particle, natural aggregate are made of fine aggregate and coarse aggregate, and wherein the fineness modulus of fine aggregate is 2.5~3.0, thick bone
The partial size of material is 10~20mm continuous grading.
Preferably, thickener be powdered hydroxypropyl methyl cellulose, viscosity be 200000Pa.S~
300000Pa.S, fiber are the length made of after processing rice straw, wheat stalk or corn straw smashing drying etc.
For 0.8~7mm, density is 300~450kg/m3。
A method of recycled fine aggregate High-strength self-compaction concrete is produced, is included the following steps:
S1: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously and is stirred
1min soaks it sufficiently, this step is preparation to cementitious material, cementitious material can in condensation process other cementing objects
Material, is formed with the substance of the complex solid of certain mechanical strength, significantly improves the intensity and durability degree of concrete, is then added and increases
Thick dose, fiber and poly- hydroxy acid water-reducing agent stir 8min, mix them thoroughly dispersion and obtain the mixture A of pulpous state；
S2: 5min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate, stirring is then added
10min, finished product make water-reducing agent and cementitious material be sufficiently mixed reaction, and cementitious material is made uniformly to be wrapped in coarse aggregate, thin
Aggregate surface.
The concrete overall mechanical properties produced using upper raw material and step are significantly improved, and recycled fine aggregate is used
Discarded building waste is taken full advantage of, resource is recycled, while agricultural crop straw is made full use of, is saved
The living environment of the mankind, environmental protection and energy saving are improved while raw material.
Embodiment three
A kind of recycled fine aggregate High-strength self-compaction concrete, the raw material indicated including following weight percent:
Portland cement 25%；
Slag 5%；
Silicon powder 1%；
Recycled fine aggregate 25%；
Natural aggregate 35%；
Water 10%；
Polycarboxylate water-reducer 0.5%；
Thickener 0.1%；
Fiber 0.1%.
Preferably, miberal powder is S95 grades of ground granulated blast furnace slags, silicon powder density is 2400kg/m3, specific surface area is
15000m2/ kg, recycled fine aggregate are broken, shaping, screening by waste and old concrete, and obtained partial size is not more than the regeneration of 4.5mm
Fine aggregate particle, natural aggregate are made of fine aggregate and coarse aggregate, and wherein the fineness modulus of fine aggregate is 2.5~3.0, thick bone
The partial size of material is 10~20mm continuous grading.
Preferably, thickener be powdered hydroxypropyl methyl cellulose, viscosity be 200000Pa.S~
300000Pa.S, fiber are the length made of after processing rice straw, wheat stalk or corn straw smashing drying etc.
For 0.8~7mm, density is 300~450kg/m3。
A method of recycled fine aggregate High-strength self-compaction concrete is produced, is included the following steps:
S1: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously and is stirred
1min soaks it sufficiently, this step is preparation to cementitious material, cementitious material can in condensation process other cementing objects
Material, is formed with the substance of the complex solid of certain mechanical strength, significantly improves the intensity and durability degree of concrete, is then added and increases
Thick dose, fiber and poly- hydroxy acid water-reducing agent stir 8min, mix them thoroughly dispersion and obtain the mixture A of pulpous state；
S2: 5min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate, stirring is then added
10min, finished product make water-reducing agent and cementitious material be sufficiently mixed reaction, and cementitious material is made uniformly to be wrapped in coarse aggregate, thin
Aggregate surface.
The concrete overall mechanical properties produced using upper raw material and step are significantly improved, and recycled fine aggregate is used
Discarded building waste is taken full advantage of, resource is recycled, while agricultural crop straw is made full use of, is saved
The living environment of the mankind, environmental protection and energy saving are improved while raw material.
Example IV
A kind of recycled fine aggregate High-strength self-compaction concrete, the raw material indicated including following weight percent:
Portland cement 20%；
Slag 5%；
Silicon powder 1%；
Recycled fine aggregate 30%；
Natural aggregate 35%；
Water 10%；
Polycarboxylate water-reducer 0.5%；
Thickener 0.2%；
Fiber 0.2%.
Preferably, miberal powder is S95 grades of ground granulated blast furnace slags, silicon powder density is 2400kg/m3, specific surface area is
15000m2/ kg, recycled fine aggregate are broken, shaping, screening by waste and old concrete, and obtained partial size is not more than the regeneration of 4.5mm
Fine aggregate particle, natural aggregate are made of fine aggregate and coarse aggregate, and wherein the fineness modulus of fine aggregate is 2.5~3.0, thick bone
The partial size of material is 10~20mm continuous grading.
Preferably, thickener be powdered hydroxypropyl methyl cellulose, viscosity be 200000Pa.S~
300000Pa.S, fiber are the length made of after processing rice straw, wheat stalk or corn straw smashing drying etc.
For 0.8~7mm, density is 300~450kg/m3。
A method of recycled fine aggregate High-strength self-compaction concrete is produced, is included the following steps:
S1: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously and is stirred
1min soaks it sufficiently, this step is preparation to cementitious material, cementitious material can in condensation process other cementing objects
Material, is formed with the substance of the complex solid of certain mechanical strength, significantly improves the intensity and durability degree of concrete, is then added and increases
Thick dose, fiber and poly- hydroxy acid water-reducing agent stir 8min, mix them thoroughly dispersion and obtain the mixture A of pulpous state；
S2: 5min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate, stirring is then added
10min, finished product make water-reducing agent and cementitious material be sufficiently mixed reaction, and cementitious material is made uniformly to be wrapped in coarse aggregate, thin
Aggregate surface.
The concrete overall mechanical properties produced using upper raw material and step are significantly improved, and recycled fine aggregate is used
Discarded building waste is taken full advantage of, resource is recycled, while agricultural crop straw is made full use of, is saved
The living environment of the mankind, environmental protection and energy saving are improved while raw material.
Example IV
A kind of recycled fine aggregate High-strength self-compaction concrete, the raw material indicated including following weight percent:
Portland cement 20%；
Slag 8%；
Silicon powder 2%；
Recycled fine aggregate 25%；
Natural aggregate 35%；
Water 10%；
Polycarboxylate water-reducer 0.2%；
Thickener 0.2%；
Fiber 0.2%.
Preferably, miberal powder is S95 grades of ground granulated blast furnace slags, silicon powder density is 2400kg/m3, specific surface area is
15000m2/ kg, recycled fine aggregate are broken, shaping, screening by waste and old concrete, and obtained partial size is not more than the regeneration of 4.5mm
Fine aggregate particle, natural aggregate are made of fine aggregate and coarse aggregate, and wherein the fineness modulus of fine aggregate is 2.5~3.0, thick bone
The partial size of material is 10~20mm continuous grading.
Preferably, thickener be powdered hydroxypropyl methyl cellulose, viscosity be 200000Pa.S~
300000Pa.S, fiber are the length made of after processing rice straw, wheat stalk or corn straw smashing drying etc.
For 0.8~7mm, density is 300~450kg/m3。
A method of recycled fine aggregate High-strength self-compaction concrete is produced, is included the following steps:
S1: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously and is stirred
1min soaks it sufficiently, this step is preparation to cementitious material, cementitious material can in condensation process other cementing objects
Material, is formed with the substance of the complex solid of certain mechanical strength, significantly improves the intensity and durability degree of concrete, is then added and increases
Thick dose, fiber and poly- hydroxy acid water-reducing agent stir 8min, mix them thoroughly dispersion and obtain the mixture A of pulpous state；
S2: 5min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate, stirring is then added
10min, finished product make water-reducing agent and cementitious material be sufficiently mixed reaction, and cementitious material is made uniformly to be wrapped in coarse aggregate, thin
Aggregate surface.
The concrete overall mechanical properties produced using above-mentioned raw materials and step are significantly improved, and the thin bone of regeneration is used
Material takes full advantage of discarded building waste, recycles to resource, while being made full use of to agricultural crop straw, saves
About raw material while improve the living environment of the mankind, environmental protection and energy saving.
Following table records the experimental data of all embodiments:
As can be seen from the table: embodiment two compares embodiment one, and the weight percent raising of slag and silicon powder is produced
Agent on crack resistance of concrete pressure is improved significantly；
Example IV is compared with embodiment one, and the weight percent of thickener and fiber improves, the agent on crack resistance of concrete pressure produced
Degree, which is similarly obtained, to be significantly improved；
Embodiment five is compared with embodiment, slag, silicon powder, thickener and fiber weight percent raise, that produces is mixed
Solidifying soil compression strength reaches highest in all embodiments, therefore the improved composition of raw materials effect of the present invention is obvious.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention, and should not be construed as limiting the claims involved any label in claim.
Claims (4)
1. a kind of recycled fine aggregate High-strength self-compaction concrete, it is characterised in that: the original indicated including following weight percent
Material:
Portland cement 20~30%；
Slag 5~8%；
Silicon powder 1~2%；
Recycled fine aggregate 25~35%；
Natural aggregate 35~45%；
Water 10~15%；
Polycarboxylate water-reducer 0.2~0.5%；
Thickener 0.1~0.2%；
Fiber 0.1~0.2%.
2. a kind of recycled fine aggregate High-strength self-compaction concrete according to claim 1, it is characterised in that: the miberal powder is
S95 grades of ground granulated blast furnace slags, the silicon powder density are 2400kg/m3, specific surface area 15000m2/ kg, the thin bone of regeneration
For material for broken, shaping, screening by waste and old concrete, obtained partial size is not more than the recycled fine aggregate particle of 4.5mm, described natural
Aggregate is made of fine aggregate and coarse aggregate, and wherein the fineness modulus of fine aggregate is 2.5~3.0, and the partial size of coarse aggregate is 10~
20mm continuous grading.
3. a kind of recycled fine aggregate High-strength self-compaction concrete according to claim 1, it is characterised in that: the thickener
For powdered hydroxypropyl methyl cellulose, viscosity is 200000Pa.S~300000Pa.S, and the fiber is by by straw
Stalk, wheat stalk or corn straw smashing drying etc. processing after made of, length be 0.8~7mm, density be 300~
450kg/m3。
4. a kind of produce a kind of method of recycled fine aggregate High-strength self-compaction concrete as described in claim 1, feature exists
In: include the following steps:
S1: the half of load weighted portland cement, slag, silicon powder and total water is added in blender simultaneously and is stirred
1min soaks it sufficiently, thickener is then added, fiber and poly- hydroxy acid water-reducing agent stir 5~8min, mixes them thoroughly point
It dissipates and obtains the mixture A of pulpous state；
S2: 3~5min is mixed in recycled fine aggregate and remaining water, mixture A and natural aggregate, stirring is then added
10min, finished product.
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| CN109928684A (en) * | 2019-04-11 | 2019-06-25 | 咸阳天力商品混凝土有限公司 | Concrete and its preparation process |
| CN112266203A (en) * | 2020-10-14 | 2021-01-26 | 卢卫征 | Recycled fine aggregate high-strength self-compacting concrete and preparation method thereof |
| CN112979225A (en) * | 2021-03-03 | 2021-06-18 | 曙光装配式建筑科技（浙江）有限公司 | Pervious concrete and preparation method thereof |
| CN113929381A (en) * | 2021-09-27 | 2022-01-14 | 河南城建学院 | Low-shrinkage recycled high-performance concrete and preparation method thereof |
| ES2891677A1 (en) * | 2020-07-17 | 2022-01-28 | Univ Burgos | Self-compacting concrete with recycled concrete aggregate and its production procedure (Machine-translation by Google Translate, not legally binding) |
| CN114262178A (en) * | 2021-12-09 | 2022-04-01 | 扬州通惠系统集成科技有限公司 | Recycled fine aggregate high-strength self-compacting concrete and preparation method thereof |
| CN114507042A (en) * | 2021-12-28 | 2022-05-17 | 深圳市华威环保建材有限公司 | Regenerated high-strength light concrete and preparation method thereof |
| CN115259797A (en) * | 2022-08-11 | 2022-11-01 | 南京工业大学 | A kind of recycled plastic fiber regenerated self-compacting concrete and preparation method thereof |
| CN119223873A (en) * | 2024-11-29 | 2024-12-31 | 四川国泰高新管廊产业投资有限公司 | A concrete intelligent detection and inspection system, equipment and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109928684A (en) * | 2019-04-11 | 2019-06-25 | 咸阳天力商品混凝土有限公司 | Concrete and its preparation process |
| ES2891677A1 (en) * | 2020-07-17 | 2022-01-28 | Univ Burgos | Self-compacting concrete with recycled concrete aggregate and its production procedure (Machine-translation by Google Translate, not legally binding) |
| CN112266203A (en) * | 2020-10-14 | 2021-01-26 | 卢卫征 | Recycled fine aggregate high-strength self-compacting concrete and preparation method thereof |
| CN112979225A (en) * | 2021-03-03 | 2021-06-18 | 曙光装配式建筑科技（浙江）有限公司 | Pervious concrete and preparation method thereof |
| CN113929381A (en) * | 2021-09-27 | 2022-01-14 | 河南城建学院 | Low-shrinkage recycled high-performance concrete and preparation method thereof |
| CN114262178A (en) * | 2021-12-09 | 2022-04-01 | 扬州通惠系统集成科技有限公司 | Recycled fine aggregate high-strength self-compacting concrete and preparation method thereof |
| CN114507042A (en) * | 2021-12-28 | 2022-05-17 | 深圳市华威环保建材有限公司 | Regenerated high-strength light concrete and preparation method thereof |
| CN115259797A (en) * | 2022-08-11 | 2022-11-01 | 南京工业大学 | A kind of recycled plastic fiber regenerated self-compacting concrete and preparation method thereof |
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