CN116553887A - High-strength recycled fine aggregate concrete - Google Patents
High-strength recycled fine aggregate concrete Download PDFInfo
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- CN116553887A CN116553887A CN202310509123.7A CN202310509123A CN116553887A CN 116553887 A CN116553887 A CN 116553887A CN 202310509123 A CN202310509123 A CN 202310509123A CN 116553887 A CN116553887 A CN 116553887A
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- 239000004567 concrete Substances 0.000 title claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- 239000011398 Portland cement Substances 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 16
- 239000010881 fly ash Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 8
- 229920005646 polycarboxylate Polymers 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 238000007580 dry-mixing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000003469 silicate cement Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 239000002699 waste material Substances 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000011374 ultra-high-performance concrete Substances 0.000 description 1
- 230000003245 working effect Effects 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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses high-strength recycled fine aggregate concrete, which comprises 262-395 parts of Portland cement, 1071-1117 parts of natural coarse aggregate, 628-841 parts of recycled fine aggregate, 65-99 parts of mineral admixture, 2-7 parts of water reducer and 181-187 parts of mixing water. The recycled fine aggregate concrete provided by the application has the advantages that the recycled fine aggregate is used for replacing natural fine aggregate, the principle is green, the workability is excellent, the mechanical property is excellent, the development concept of green environmental protection is met, the comprehensive practicability is strong, the problems that the recycled fine aggregate can only be used for preparing concrete (C15-C30) with low strength grade and poor workability in the prior art are solved, the application of the recycled fine aggregate concrete in actual engineering is greatly limited, and the recycled fine aggregate concrete is worthy of popularization and application.
Description
Technical Field
The invention relates to concrete, in particular to high-strength recycled fine aggregate concrete.
Background
With the rapid development of society, the development level of town is continuously improved, and the update development of cities brings about a great deal of old building change and new building development engineering, thereby causing two problems of great quantity of building rubbish accumulation and insufficient building raw materials. The demolition of the infrastructure creates a large amount of waste building material, with waste concrete accounting for about 30% of the building waste. The traditional method for treating the waste concrete mainly comprises the steps of transporting the waste concrete to suburbs for stacking or landfill, so that a great deal of logistics cost is required, secondary pollution is caused to the environment, and a great deal of precious land resources are occupied. If the waste concrete is processed to be made into the recycled fine aggregate for being used for preparing new concrete buildings again, the problems of processing and recycling of the waste concrete can be effectively solved, and the recycled fine aggregate is used for replacing the natural fine aggregate, so that the consumption of the natural fine aggregate in the building industry can be reduced, the exploitation of natural sand and stone is reduced, the problems of increasing lack of the natural fine aggregate and damage of a large amount of sand and stone exploitation to ecological environment are solved, and the living environment of human beings is protected.
Compared with natural fine aggregate, the recycled fine aggregate prepared by crushing and screening the waste concrete is easy to generate a large number of microcracks, so that the porosity of the recycled fine aggregate is obviously improved compared with that of the natural aggregate, the density is smaller, and the cracking phenomenon is easy to occur. Meanwhile, old cement mortar is attached to the surface of the recycled fine aggregate, so that the recycled fine aggregate has the characteristics of rough surface, more pores, multiple edges and corners, large crushing index, high water absorption, low apparent density and the like, and the recycled concrete prepared by using the recycled fine aggregate has low strength and poor durability, so that the recycled fine aggregate in the prior art can only prepare concrete (C15-C30) with low strength grade and poor working performance, and the application problem of the recycled fine aggregate concrete in practical engineering is greatly limited. There is a need for an improved method for preparing recycled fine aggregate concrete to enhance the strength of recycled concrete.
In the prior art, two main methods are currently used for preparing recycled fine aggregate concrete: 1. the traditional concrete preparation method is adopted, namely, the mixing ratio of the recycled fine aggregate concrete is calculated according to JGJ 55-2011 common concrete mixing ratio design rule, raw materials are mixed and then added into a concrete mixer for mixing, and the recycled fine aggregate concrete prepared by the method has low workability and poor workability. 2. The fine aggregate is pre-wetted in advance, the mixing ratio of the recycled fine aggregate concrete is calculated according to DB37/T5176-2021 recycled concrete mixing ratio design rule, the raw materials are mixed and added into a concrete mixer for mixing, the working performance of the recycled fine aggregate concrete prepared according to the method is obviously improved, but the mechanical property of the recycled fine aggregate concrete is poor, and the 28d compressive strength is obviously reduced.
Disclosure of Invention
The invention aims to: the present invention aims to provide a high-strength recycled fine aggregate concrete with excellent workability.
The technical scheme is as follows: the high-strength recycled fine aggregate concrete provided by the invention comprises the following raw materials in parts by weight:
portland cement: 262-395 parts
Natural coarse aggregate: 1071-1117 parts
Regenerating fine aggregate: 628-841 parts
Mineral admixture: 65-99 parts
Water reducing agent: 2-7 parts
Mixing water: 181-187 parts of
The preparation method comprises the steps of sequentially feeding the natural coarse aggregate, the silicate cement, the mineral admixture and the recycled fine aggregate according to the weight parts, uniformly dry-mixing to obtain a dry mixed material, uniformly stirring 88-95 weight parts of mixing water and a water reducer, adding the dry mixed material, continuously stirring, finally adding the rest mixing water, uniformly stirring to prepare the recycled fine aggregate concrete, and standing for maintenance.
Preferably, the portland cement is PO 42.5 cement.
Preferably, the natural coarse aggregate is formed by mixing two kinds of natural basalt coarse aggregates with the particle size of 5-10 mm and the content of 38-44%; the grain diameter is 9.5-16 mm, and the content is 56-62%.
Preferably, the mineral admixture is fly ash.
Preferably, the fineness modulus of the regenerated fine aggregate is 2.7-3.6, and the saturated surface dry water absorption rate is 8-15%.
Preferably, the water reducer is a high-efficiency polycarboxylate water reducer, the water reducing rate is more than 20%, and the mixing amount of the water reducer is 0.5% -1.5% of the total amount of the silicate cement and the mineral admixture.
Preferably, the mixing water comprises water consumption determined in the mixing proportion design and additional water determined according to the water absorption rate of the recycled fine aggregate, wherein the additional water accounts for 2.5-4% of the mass of the recycled fine aggregate.
Preferably, the dry mixing time is 170-190 seconds, and the mixing time after adding the mixing water for two times is 60-120 seconds.
The principle of the invention: when the recycled fine aggregate is used for replacing natural fine aggregate to prepare recycled concrete, part of free water in the concrete mixture is absorbed due to the high water absorption rate of the recycled fine aggregate, so that the workability of the recycled concrete is reduced. The method has the advantages that the actual water-cement ratio of the concrete can be changed by directly adding water into the concrete mixture, the mechanical property of the concrete is affected, and the recycled fine aggregate can not fully absorb more water in the concrete mixing process, so that the method quantifies the doping amount of the additional water through a large number of experiments, and ensures that the recycled fine aggregate fully absorbs water through a method of adding the mixing water twice.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable advantages: (1) The recycled fine aggregate concrete can meet the physical mechanical properties and working properties of concrete required by general construction engineering and the like at the present stage, and has higher fluidity and expansion degree; (2) The pre-wetting process of the recycled fine aggregate is avoided, the preparation of the concrete is carried out under the condition of drying raw materials, the space of the pre-wetting recycled fine aggregate is saved, the error of the recycled concrete in the pre-wetting process is reduced, and good workability can be achieved under the condition of no pre-wetting; (3) Because the recycled fine aggregate is not subjected to additional modification operation, the manufacturing cost is reduced, the additional process in the production process is reduced, and the direct application of a stirring station is facilitated.
Detailed Description
The technical scheme of the invention is further described below with reference to specific examples.
Example 1
1. The cement material is PO 42.5 cement of China cement plant of conch group; the fly ash is II-grade fly ash produced by a Henan Zhengzhou power plant; the water reducer is a high-efficiency polycarboxylate water reducer sold by Jiangsu Su Bo special Co., ltd, the water reducing rate is 30%, the natural coarse aggregate is basalt coarse aggregate, wherein the grain diameter is 5-10 mm and accounts for 40% of the total mass fraction; the grain diameter is 9.5-16 mm and accounts for 60% of the total mass fraction, the fineness modulus of the regenerated fine aggregate is 3.3, and the saturation dry water absorption rate is 11.5%.
2. The materials were weighed as follows
3. The preparation process comprises the following steps:
1) 262 parts by weight of cement, 65 parts by weight of fly ash, 841 parts by weight of regenerated fine aggregate and 1071 parts by weight of natural coarse aggregate are added into a concrete mixer and stirred for 3min at a rotation speed of 45r/min, so that uniform dry blend is obtained.
2) And uniformly stirring and mixing 2 parts by weight of the high-efficiency water reducer and 93 parts by weight of the mixing water, slowly adding the mixture into the dry mixed material, stirring for 60-120 seconds until the mixture is uniform at the rotating speed of 45r/min, and adding the remaining 94 parts by weight of the mixing water to stir for 60-120 seconds until the mixture is uniform, thereby forming the concrete matrix with excellent flowability.
3) And (3) standing for 1 day after the concrete is formed, transferring the concrete into a standard curing room for curing for 28 days, wherein the temperature of the curing room is controlled at 20+/-2 ℃, and the relative humidity is controlled to be more than 95%.
4. When the curing age reaches 28 days, the compressive strength, the flexural strength and the elastic modulus of the recycled concrete at 28 days are tested according to the standard GB/T50081-2019 'physical and mechanical properties test method standard of concrete', and the test results are shown in Table 1.
Example 2
1. The cement material is PO 42.5 cement of China cement plant of conch group; the fly ash is II-grade fly ash produced by a Henan Zhengzhou power plant; the water reducing agent is a high-efficiency polycarboxylate water reducing agent sold by Jiangsu Su Bo special Co., ltd, and the water reducing rate is 30%; the natural coarse aggregate is basalt coarse aggregate, wherein the grain diameter is 5-10 mm and accounts for 40% of the total mass fraction; the grain diameter is 9.5-16 mm and accounts for 60% of the total mass fraction, the fineness modulus of the regenerated fine aggregate is 3.3, and the saturation dry water absorption rate is 11.5%.
2. The materials were weighed as follows
3. The preparation process comprises the following steps:
1) 322 parts by weight of cement, 81 parts by weight of fly ash, 734 parts by weight of regenerated fine aggregate and 1101 parts by weight of natural coarse aggregate are added into a concrete mixer and stirred for 3min at a rotation speed of 45r/min, so that a uniform dry blend is obtained.
2) And uniformly stirring and mixing 4 parts by weight of the high-efficiency water reducer and 92 parts by weight of water, slowly adding the mixture into a dry mixed material, stirring for 60-120 seconds to be uniform, adding the rest 92 parts by weight of the mixed water, and stirring for 60-120 seconds to be uniform, thereby forming the concrete matrix with excellent flowability.
3) And (3) standing for 1 day after the concrete is formed, transferring the concrete into a standard curing room for curing for 28 days, wherein the temperature of the curing room is controlled at 20+/-2 ℃, and the relative humidity is controlled to be more than 95%.
4. When the curing age reaches 28 days, the compressive strength, the flexural strength and the elastic modulus of the recycled concrete at 28 days are tested according to the standard GB/T50081-2019 'physical and mechanical properties test method standard of concrete', and the test results are shown in Table 1.
Example 3
1. The cement material selected in case 3 is PO 42.5 grade cement of China cement plant of conch group; the fly ash is II-grade fly ash produced by a Henan Zhengzhou power plant; the water reducing agent is a high-efficiency polycarboxylate water reducing agent sold by Jiangsu Su Bo special Co., ltd, and the water reducing rate is 30%; the natural coarse aggregate is basalt coarse aggregate, wherein the grain diameter is 5-10 mm and accounts for 40% of the total mass fraction; the grain diameter is 9.5-16 mm and accounts for 60% of the total mass fraction, the fineness modulus of the regenerated fine aggregate is 3.3, and the saturation dry water absorption rate is 11.5%.
2. The materials were weighed as follows
3. The preparation process comprises the following steps:
1) 395 parts by weight of cement, 99 parts by weight of fly ash, 628 parts by weight of regenerated fine aggregate and 1117 parts by weight of natural coarse aggregate are added into a concrete mixer and stirred for 3min at a rotation speed of 45r/min, so that a uniform dry blend is obtained.
2) And (3) uniformly stirring and mixing 7 parts by weight of the high-efficiency water reducer and 91 parts by weight of water, slowly adding the mixture into a dry mixed material, stirring for 60-120 seconds to be uniform, adding the rest 90 parts by weight of the mixed water, and stirring for 60-120 seconds to be uniform, so as to form the concrete matrix with excellent flowability.
3) And (3) standing for 1 day after the concrete is formed, transferring the concrete into a standard curing room for curing for 28 days, wherein the temperature of the curing room is controlled at 20+/-2 ℃, and the relative humidity is controlled to be more than 95%.
4. When the curing age reaches 28 days, the 28-day compressive strength, the initial cracking strength, the flexural strength, the fracture toughness and the elastic modulus of the ultra-high performance concrete are tested according to the standard GB/T50081-2019 'physical and mechanical properties test method standard', and the test results are shown in Table 1.
Comparative example
1. The cement material selected in the comparative example is PO 42.5 grade cement of China cement plant of conch group; the fly ash is II-grade fly ash produced by a Henan Zhengzhou power plant; the water reducing agent is a high-efficiency polycarboxylate water reducing agent sold by Jiangsu Su Bo special Co., ltd, and the water reducing rate is 30%; the natural coarse aggregate is basalt coarse aggregate, wherein the grain diameter is 5-10 mm and accounts for 40% of the total mass fraction; the grain diameter is 9.5-16 mm and accounts for 60% of the total mass fraction, the fineness modulus of the regenerated fine aggregate is 3.3, and the saturation dry water absorption rate is 11.5%.
2. The materials were weighed as follows
3. The preparation process comprises the following steps:
1) 262 parts by weight of cement, 65 parts by weight of fly ash, 841 parts by weight of regenerated fine aggregate and 1071 parts by weight of natural coarse aggregate are added into a concrete mixer and stirred for 3min at a rotation speed of 45r/min, so that uniform dry blend is obtained.
2) And uniformly stirring and mixing 2 parts by weight of the high-efficiency water reducer and 161 parts by weight of mixing water, slowly adding the mixture into a dry mixed material, and forming a concrete matrix with excellent flow property, wherein the rotation speed of a stirrer is 45r/min and the stirring time is 3 min.
3) And (3) standing for 1 day after the concrete is formed, transferring the concrete into a standard curing room for curing for 28 days, wherein the temperature of the curing room is controlled at 20+/-2 ℃, and the relative humidity is controlled to be more than 95%.
4. When the curing age reaches 28 days, the compressive strength, the flexural strength and the elastic modulus of the recycled concrete at 28 days are tested according to the standard GB/T50081-2019 'physical and mechanical properties test method standard of concrete', and the test results are shown in Table 1.
TABLE 1 specific physical and mechanical Properties of examples 1-3
| Expansion degree/mm | Compressive Strength/MPa | Flexural Strength/MPa | Elastic modulus/GPa | |
| Example 1 | 360 | 38.5 | 4.25 | 44.78 |
| Example 2 | 410 | 44.9 | 4.74 | 45.68 |
| Example 3 | 460 | 58.4 | 5.31 | 46.84 |
| Comparative example | 340 | 23.4 | 2.41 | 44.53 |
Claims (10)
1. The high-strength recycled fine aggregate concrete is characterized by comprising the following raw materials in parts by weight:
portland cement: 262-395 parts
Natural coarse aggregate: 1071-1117 parts
Regenerating fine aggregate: 628-841 parts
Mineral admixture: 65-99 parts
Water reducing agent: 2-7 parts
Mixing water: 181-187 parts of
The preparation method comprises the steps of sequentially feeding the natural coarse aggregate, the silicate cement, the mineral admixture and the recycled fine aggregate according to the weight parts, uniformly dry-mixing to obtain a dry mixed material, uniformly stirring 88-95 weight parts of mixing water and a water reducer, adding the dry mixed material, continuously stirring, finally adding the rest mixing water, uniformly stirring to prepare the recycled fine aggregate concrete, and standing for maintenance.
2. The recycled fine aggregate concrete of claim 1, wherein the portland cement is PO 42.5 cement.
3. The recycled fine aggregate concrete according to claim 1, wherein the natural coarse aggregate is formed by mixing two kinds of natural basalt coarse aggregates with particle sizes, wherein the particle sizes are 5-10 mm and account for 38% -44% of the total mass fraction; the grain diameter is 9.5-16 mm and accounts for 56-62% of the total mass fraction.
4. The recycled fine aggregate concrete of claim 1, wherein the mineral admixture is fly ash.
5. The recycled fine aggregate concrete according to claim 1, wherein the recycled fine aggregate has a fineness modulus of 2.7 to 3.6 and a saturated surface dry water absorption of 8% to 15%.
6. The recycled fine aggregate concrete according to claim 1, wherein the water reducing agent is a high-efficiency polycarboxylate water reducing agent, and the water reducing rate is 20% or more.
7. The recycled fine aggregate concrete according to claim 1, wherein the water reducing agent is added in an amount of 0.5 to 1.5% based on the total amount of the portland cement and mineral admixture.
8. The recycled fine aggregate concrete according to claim 1, wherein the mix water includes a water amount determined at the time of mix proportion design and additional water determined according to the water absorption of the recycled fine aggregate.
9. The recycled fine aggregate concrete according to claim 1, wherein the dry mixing time is 170 to 190 seconds.
10. The recycled fine aggregate concrete according to claim 1, wherein the stirring time after adding the mixing water twice is 60 to 120 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310509123.7A CN116553887A (en) | 2023-05-08 | 2023-05-08 | High-strength recycled fine aggregate concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310509123.7A CN116553887A (en) | 2023-05-08 | 2023-05-08 | High-strength recycled fine aggregate concrete |
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| CN202310509123.7A Pending CN116553887A (en) | 2023-05-08 | 2023-05-08 | High-strength recycled fine aggregate concrete |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936369A (en) * | 2014-04-18 | 2014-07-23 | 张家港江苏科技大学产业技术研究院 | Grade-C30 single-particle regenerated self-compaction concrete and preparation method thereof |
| CN104829178A (en) * | 2015-04-21 | 2015-08-12 | 江苏德丰建设集团有限公司 | C30 grade steel-doped slag recycled aggregate self compacting concrete and preparation method thereof |
| CN107235684A (en) * | 2017-06-21 | 2017-10-10 | 福州大学 | A kind of recycled fine aggregate ultra-high performance concrete and its application method |
| CN107265979A (en) * | 2017-06-30 | 2017-10-20 | 华南理工大学 | A kind of C50 high performance concretes prepared with full recycled fine aggregate |
| AU2020103163A4 (en) * | 2020-11-02 | 2021-01-14 | Tongji University | A Fully Recycled Concrete Wave-proof Block Using Large-particle-size Recycled Coarse Aggregate and Recycled Powder and Preparation Method Thereof |
| CN113060990A (en) * | 2021-03-25 | 2021-07-02 | 沈阳理工大学 | Recycled concrete composite self-insulation building block and preparation method and application thereof |
-
2023
- 2023-05-08 CN CN202310509123.7A patent/CN116553887A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936369A (en) * | 2014-04-18 | 2014-07-23 | 张家港江苏科技大学产业技术研究院 | Grade-C30 single-particle regenerated self-compaction concrete and preparation method thereof |
| CN104829178A (en) * | 2015-04-21 | 2015-08-12 | 江苏德丰建设集团有限公司 | C30 grade steel-doped slag recycled aggregate self compacting concrete and preparation method thereof |
| CN107235684A (en) * | 2017-06-21 | 2017-10-10 | 福州大学 | A kind of recycled fine aggregate ultra-high performance concrete and its application method |
| CN107265979A (en) * | 2017-06-30 | 2017-10-20 | 华南理工大学 | A kind of C50 high performance concretes prepared with full recycled fine aggregate |
| AU2020103163A4 (en) * | 2020-11-02 | 2021-01-14 | Tongji University | A Fully Recycled Concrete Wave-proof Block Using Large-particle-size Recycled Coarse Aggregate and Recycled Powder and Preparation Method Thereof |
| CN113060990A (en) * | 2021-03-25 | 2021-07-02 | 沈阳理工大学 | Recycled concrete composite self-insulation building block and preparation method and application thereof |
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