CN112876175A - Self-curing recycled brick-concrete aggregate concrete and preparation method thereof - Google Patents
Self-curing recycled brick-concrete aggregate concrete and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
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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
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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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- Chemical & Material Sciences (AREA)
- 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 relates to self-curing recycled brick-concrete aggregate concrete and a preparation method thereof. The self-curing recycled brick-concrete aggregate concrete comprises a cementing component, fine aggregate, coarse aggregate, a water reducing agent and water; wherein the coarse aggregate comprises one or two of natural macadam and tailing waste stone, and also comprises recycled brick-concrete aggregate; the recycled brick-concrete coarse aggregate accounts for 10-30% of the volume of the coarse aggregate. The invention uses the recycled brick-concrete coarse aggregate to partially replace natural aggregate in concrete, and develops the recycled brick-concrete aggregate concrete with excellent self-maintenance and heat preservation performance by combining the characteristics of high porosity and high water absorption of the recycled brick-concrete aggregate.
Description
Technical Field
The invention relates to the technical field of concrete products, in particular to self-curing recycled brick-concrete aggregate concrete and a preparation method thereof.
Background
With the continuous promotion of the urbanization process and the demolition and reconstruction of early old buildings, the solid waste of the buildings reaches more than 30 percent of the solid waste of the municipal buildings, and the newly produced solid waste of the buildings exceeds 18 hundred million tons every year. According to statistics, the proportion of the waste clay bricks in the building solid waste is higher and accounts for about 25.2 percent. Due to the problems of low strength, high porosity, high water absorption and the like of the waste clay bricks, the research and application of the waste clay bricks are far short of that of recycled concrete, and the problems need to be solved and utilized urgently.
At present, the application research of the waste clay brick mainly comprises the following steps: 1) grinding into brick powder as concrete admixture; 2) the concrete aggregate is directly used as concrete aggregate after crushing and sorting. However, the recycled brick powder has high water absorption rate, and the brick powder mainly contains feldspar minerals and quartz phases due to high-temperature calcination, so that the activity is low, and the strength loss of concrete is obvious after the portland cement is partially replaced, so that the recycled brick powder has low substitution degree and reduced concrete performance when being used as an admixture, and the resource utilization level is limited. The recycled brick aggregate mainly exists when replacing part of concrete aggregate: 1) the recycled brick aggregate has low intrinsic strength, so the crushing index is higher (generally >20 percent), and the recycled brick aggregate can only be used for preparing low-strength concrete; 2) after the recycled brick aggregate replaces part of common concrete aggregate, the mechanical properties such as the elastic modulus and the like of the concrete are obviously reduced (by 20 to 40 percent); 3) as the recycled brick aggregate has higher porosity, the permeability, durability and the like of recycled brick concrete are poorer. Thus, its application is limited to non-load bearing members or low-rise building structures.
Disclosure of Invention
The invention provides a self-curing recycled brick-concrete aggregate concrete, which is prepared by replacing natural aggregate in the concrete with recycled brick-concrete coarse aggregate.
The self-curing recycled brick-concrete aggregate concrete comprises a gelling component, fine aggregate, coarse aggregate, a water reducing agent and water;
wherein the coarse aggregate comprises one or two of natural macadam and tailing waste stone, and also comprises recycled brick-concrete aggregate; the recycled brick-concrete coarse aggregate accounts for 10-30% of the volume of the coarse aggregate.
The inventor discovers through a large amount of experimental researches that by taking C30 concrete as an example, 10-30% of the volume of the coarse aggregate is replaced by the recycled brick-concrete coarse aggregate, and the requirement on the strength of the concrete can be met; and the concrete can be cured internally, which is beneficial to improving the heat insulation performance of the concrete.
According to the embodiment of the invention, the strength grade of the concrete is not reduced by taking the proportion of the C30 grade concrete as a reference, and after the recycled brick-concrete coarse aggregate replaces 30% of the volume of the coarse aggregate, the concrete still meets the strength grade of the C30 concrete, and the 28D compressive strength is more than or equal to 35 MPa.
According to the embodiment of the invention, the gelling component comprises cement, or further comprises one or two of fly ash and mineral powder.
According to the embodiment of the invention, the weight percentage content of the cement in the gelling component is more than or equal to 50%.
According to the embodiment of the invention, the gelling component comprises cement, fly ash and mineral powder, wherein the cement is 50-100 parts, the fly ash is 0-50 parts, and the mineral powder is 0-50 parts, based on 100 parts of the gelling component by weight.
According to the embodiment of the invention, the content of the cementitious component in the recycled brick-concrete aggregate concrete is 340-420kg/m3。
According to an embodiment of the present invention, the fine aggregate includes one or a combination of both of natural river sand and machine-made sand.
According to the embodiment of the invention, the fine aggregate is natural river sand.
According to an embodiment of the invention, the coarse aggregate further comprises recycled concrete; the recycled concrete accounts for 0-30% of the weight of the coarse aggregate.
According to an embodiment of the invention, the cement is P.O 42.5.5 ordinary portland cement.
According to the embodiment of the invention, the fly ash is class II fly ash in GB/T1596-2017 fly ash for cement and concrete.
According to the embodiment of the invention, the mineral powder is S95 grade slag powder of granulated blast furnace slag powder for cement, mortar and concrete GB/T18046-2017.
According to the embodiment of the invention, the natural river sand is type II sand with fineness modulus of 2.7-3.1 and mud content of less than 1.0%.
According to the embodiment of the invention, the fineness modulus of the machine-made sand is 2.5-3.0, and the content of stone powder is less than or equal to 5%.
According to the embodiment of the invention, the sand rate of the recycled brick-concrete aggregate concrete is 35-42%.
According to the embodiment of the invention, in the natural macadam, the content of micro powder is less than or equal to 2%, the water absorption rate is less than or equal to 2%, and the crushing index is less than or equal to 20%.
According to the embodiment of the invention, the content of micro powder in the waste tailings is less than or equal to 2%, the water absorption rate is less than or equal to 2%, and the crushing index is less than or equal to 20%.
According to the embodiment of the invention, the recycled concrete has the micro powder content of less than or equal to 2 percent, the water absorption of less than or equal to 5 percent and the crushing index of less than or equal to 14 percent.
According to the embodiment of the invention, the raw material of the recycled brick-concrete coarse aggregate is the waste clay brick which is obtained by crushing, sorting and screening the building solid waste.
According to the embodiment of the invention, the particle size fraction of the recycled brick-concrete coarse aggregate is 5-30mm continuous gradation.
According to the embodiment of the invention, the waste clay brick in the recycled brick-concrete aggregate has a weight percentage content of more than or equal to 50 percent (such as 50-65 percent), a water absorption of 10-20 percent, a porosity of 15-40 percent and a crushing index of less than or equal to 30 percent.
According to the embodiment of the invention, the recycled brick-concrete aggregate can meet the standard requirement of common concrete aggregate.
According to an embodiment of the invention, the recycled brick-concrete coarse aggregate accounts for 20-30% of the volume of the coarse aggregate, such as 10%, 20%, 30%.
The inventor discovers that 10-30% of the volume of the coarse aggregate is replaced by the recycled brick-concrete coarse aggregate through a large amount of experimental researches, and the strength of the concrete is not obviously reduced; the drying shrinkage of the concrete can be reduced, the temperature conductivity of the concrete can be improved, and the utilization level of the recycled brick-concrete aggregate can be improved.
According to the embodiment of the invention, the weight percentage of the coarse aggregate in the self-curing recycled brick-concrete aggregate concrete is 10-28%, such as 17.7%.
According to the embodiment of the invention, the water reducing agent is a liquid polycarboxylic acid water reducing agent.
According to the embodiment of the invention, in the recycled brick-concrete aggregate concrete, the water reducing agent accounts for 1-2% of the weight of the cementitious component.
According to the embodiment of the invention, the water cement ratio in the recycled brick-concrete aggregate concrete is 0.38-0.42.
Unless otherwise specified, the amounts of the components of the recycled brick-concrete aggregate concrete are calculated on a dry weight basis, except for water.
The invention also provides a preparation method of the recycled brick-concrete aggregate concrete, which can be prepared by mixing the recycled brick-concrete aggregate concrete uniformly according to a conventional method in the field.
According to the embodiment of the invention, the preparation method of the recycled brick-concrete aggregate concrete comprises the following steps:
soaking the recycled brick-concrete coarse aggregate in clear water to fully absorb water so that the recycled brick-concrete aggregate reaches a saturated surface dry state;
except for the water reducing agent and the water, uniformly mixing the water-absorbed recycled brick-mixed coarse aggregate and other components according to the proportion to obtain a mixed dry material;
and adding a water reducing agent and water into the obtained mixed dry material, and uniformly stirring to prepare the recycled brick-concrete aggregate concrete.
In some embodiments, to facilitate calculation of the amount of recycled brick concrete aggregate added, it may be dried to a constant weight at 105 ℃ in advance and then cooled to room temperature.
In some embodiments, the recycled brick-concrete aggregate is weighed and completely soaked in clear water for 24 hours, excess moisture is filtered off by a sieve and the recycled brick-concrete aggregate is allowed to reach a saturated face dry state at room temperature for later use.
In some embodiments, in order to facilitate uniform mixing, part of the water reducing agent and water can be added into the obtained mixed dry material, and stirring is carried out, so that the aggregate surface slurry is uniformly coated; and adding the balance of water reducing agent and water, and uniformly stirring to prepare the recycled brick-concrete aggregate concrete.
Based on the research, the invention also provides the application of the recycled brick-concrete aggregate in preparing self-curing concrete. Preferably, the self-curing concrete comprises coarse aggregate, and the recycled brick-concrete coarse aggregate accounts for 10-30% of the volume of the coarse aggregate.
The research of the invention finds that the recycled brick-concrete aggregate can replace the natural aggregate within 30 percent without reducing the strength grade of the concrete, is beneficial to relieving the current situation of shortage of the natural sandstone aggregate, and simultaneously enables the concrete to have self-curing capability and can reduce the drying shrinkage of the concrete. The heat preservation performance of the concrete is obviously improved, and the heat conductivity coefficient of the concrete is 0.0021m when the recycled brick-concrete aggregate replaces 30 percent of natural aggregate2The flow/h is reduced to 0.0013m2The improvement effect is obvious.
The invention develops the recycled brick-concrete aggregate concrete with self-curing and self-heat-preserving performances by using the recycled brick-concrete coarse aggregate to partially or completely replace the natural aggregate in the concrete and combining the characteristics of high porosity and high water absorption of the recycled brick-concrete aggregate, thereby obviously improving the heat-preserving performance of the concrete while reducing the drying shrinkage of the concrete.
Drawings
FIG. 1 shows the results of the strength property test in Experimental example 1 of the present invention.
FIG. 2 shows the results of the drying shrinkage property test in Experimental example 1 of the present invention.
FIG. 3 shows the results of the concrete thermal diffusivity test of Experimental example 1 of the present invention.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications. The reagents or instruments used are conventional products available from regular distributors, not indicated by the manufacturer.
The cement used below was P.O 42.5.5 portland cement.
The fly ash used in the following is class II fly ash in GB/T1596-fly ash for cement and concrete 2017.
The mineral powder used in the following is S95 grade slag powder of GB/T18046-2017 granulated blast furnace slag powder used in cement, mortar and concrete.
The water reducing agent used in the method is a liquid polycarboxylate water reducing agent which meets JGT 223-2017 polycarboxylic acid high-performance water reducing agent.
The sand used below is natural river sand, the fineness modulus is 2.7-3.1, and the silt content is less than 1.0% of the sand in the area II.
The following stones are natural gravels meeting the requirements of construction pebbles and gravels GB/T14685-2011, and the apparent density is 2.86g/cm3。
The water absorption rate of the recycled brick-concrete aggregate is 15.2 percent, the crushing index is 24.8 percent, the continuous gradation of 5-30mm is realized, the content of the waste clay brick is 64 percent, and the apparent density is 2.47g/cm3。
Examples 1 to 4
The formulation of the recycled brick concrete aggregate concrete is shown in table 1 below. The test (Ref) was carried out on the basis of a formulation without addition of recycled brick-mixed coarse aggregate.
TABLE 1 base concrete to example concrete mix ratio
In table 1, the amounts of cement, fly ash, mineral powder, water reducing agent, sand, stone, recycled brick-concrete aggregate and water are all in kg.
The preparation method comprises the following steps: soaking the recycled brick-concrete coarse aggregate in clear water to fully absorb water so that the recycled brick-concrete aggregate reaches a saturated surface dry state; except for the water reducing agent and the water, uniformly mixing the water-absorbed recycled brick-mixed coarse aggregate and other components according to the proportion to obtain a mixed dry material; and adding a water reducing agent and water into the obtained mixed dry material, and uniformly stirring to prepare the recycled brick-concrete aggregate concrete.
Experimental example 1
In order to evaluate the self-curing performance of the recycled brick-concrete aggregate concrete with self-curing and self-heat-insulating properties described in examples 1 to 4, after the concrete is pre-cured for 24 hours and demolded, the corresponding concrete test block is placed in an environment of 21 ± 1 ℃ and 55% RH to test the strength development tendency and the drying shrinkage performance, and the test results are shown in fig. 1 (the ordinate is the compressive strength) and fig. 2 (the abscissa is the time (week) and the ordinate is the drying shrinkage).
Within the range of 10-30% of the mixing amount (volume ratio), the strength retention rate (strength of the recycled brick-concrete aggregate/strength of reference concrete) of the recycled brick-concrete aggregate concrete increases with the increase of the age, and the degree of the increase is remarkably increased with the increase of the mixing amount of the recycled brick-concrete aggregate, as shown in fig. 1, which means that the mixing of the recycled brick-concrete aggregate promotes the strength development of the concrete at the later stage (7-28 days). This indicates that the recycled brick-concrete aggregate has an internal curing effect. The drying shrinkage test results further confirm this conclusion, as shown in figure 2.
When the mixing amount (volume ratio) of the recycled brick-mixed aggregate is increased from 10% to 20%, the drying shrinkage of the concrete at all ages is obviously reduced. However, when the amount of the recycled brick-mixed aggregate was increased to 30%, the drying shrinkage of R30 was lower than that of R20 in 7 days, and after more than 7 days, the drying shrinkage of R30 started to be higher than that of R20 instead. This tendency is more pronounced in the case of 100% replacement of natural aggregates by recycled brick-concrete aggregates, the drying shrinkage of R100 being even higher by 50 ε than that of the reference sample at 28 days. The reduction of the drying shrinkage at the early stage and the increase of the drying shrinkage at the later stage mean that the recycled brick concrete aggregate can surely perform the internal curing function. On one hand, the extra water stored in the recycled clay brick aggregate can reduce the early drying and the volume shrinkage caused by the self-drying process, and on the other hand, the water released by the recycled clay brick aggregate at the later stage can promote the hydration of cement and increase the chemical shrinkage. Therefore, when the recycled brick-concrete aggregate is used as the internal curing agent, the optimal mixing amount of the recycled brick-concrete aggregate must be considered to achieve the purpose of shrinkage reduction.
When 20% and 30% of the volume of the natural aggregate is replaced by the recycled brick-concrete aggregate in the embodiments 2 and 3, respectively, the strength of the concrete is reduced slightly, the drying shrinkage of the concrete is reduced, and a more obvious internal curing effect is achieved.
In order to evaluate the thermal conductivity of the recycled brick-concrete aggregate concrete with self-curing and self-heat-preserving properties in the preferred embodiment 3, the concrete thermal conductivity coefficient test method in JGT 329-2011 is adopted, and the test result is shown in fig. 3.
Compared with the reference concrete, the concrete in the example 3 has the thermal conductivity coefficient of 0.0021m2The flow/h is reduced to 0.0013m2And h, showing that the thermal insulation performance of the recycled brick-concrete aggregate is obviously improved.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The self-curing recycled brick-concrete aggregate concrete comprises a gelling component, fine aggregate, coarse aggregate, a water reducing agent and water;
wherein the coarse aggregate comprises one or two of natural macadam and tailing waste stone, and also comprises recycled brick-concrete aggregate; the recycled brick-concrete coarse aggregate accounts for 10-30% of the volume of the coarse aggregate.
2. The recycled brick-concrete aggregate concrete according to claim 1, wherein the cementitious component comprises cement, or further comprises one or both of fly ash and mineral powder; preferably, the weight percentage content of the cement in the gelling component is more than or equal to 50 percent.
3. The recycled brick-concrete aggregate concrete according to claim 1, wherein the cementitious component consists of 50-100 parts of cement, 0-50 parts of fly ash and 0-50 parts of mineral powder, based on 100 parts of the cementitious component by weight.
4. The recycled brick and concrete aggregate concrete according to any one of claims 1 to 3,wherein the content of the gelling component in the recycled brick-concrete aggregate concrete is 340-420kg/m3。
5. The recycled brick and concrete aggregate concrete according to any one of claims 1 to 4, wherein the sand content in the recycled brick and concrete aggregate concrete is 35 to 42%.
6. The recycled brick and concrete aggregate concrete according to any one of claims 1 to 5, wherein the cement ratio in the recycled brick and concrete aggregate concrete is 0.38 to 0.42.
7. The recycled brick and concrete aggregate concrete according to any one of claims 1 to 6, wherein the recycled brick and concrete aggregate contains more than or equal to 50% of waste clay bricks by weight, has a water absorption of 10 to 20%, a porosity of 15 to 40%, and a crushing index of less than or equal to 30%.
8. The recycled brick mixed aggregate concrete according to any one of claims 1 to 7, wherein the fraction of the recycled brick mixed coarse aggregate is a continuous gradation of 5 to 30 mm.
9. The method for producing recycled brick-concrete aggregate concrete according to any one of claims 1 to 8, comprising:
soaking the recycled brick-concrete coarse aggregate in clear water to fully absorb water so that the recycled brick-concrete aggregate reaches a saturated surface dry state;
except for the water reducing agent and the water, uniformly mixing the water-absorbed recycled brick-mixed coarse aggregate and other components according to the proportion to obtain a mixed dry material;
and adding a water reducing agent and water into the obtained mixed dry material, and uniformly stirring to prepare the recycled brick-concrete aggregate concrete.
10. The application of the recycled brick-concrete aggregate in preparing self-curing concrete; preferably, the self-curing concrete comprises coarse aggregate, and the recycled brick-concrete coarse aggregate accounts for 10-30% of the volume of the coarse aggregate.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113831089A (en) * | 2021-10-18 | 2021-12-24 | 山东理工大学 | Cement concrete curb containing brick-concrete building garbage recycled aggregate and preparation method thereof |
| CN114195437A (en) * | 2021-11-15 | 2022-03-18 | 北京建工资源循环利用投资有限公司 | Recycled concrete replaced by brick-concrete recycled coarse aggregate and preparation method thereof |
| CN115745505A (en) * | 2022-10-24 | 2023-03-07 | 浙江磊帮新型建材有限公司 | Ecological early-strength anti-permeability dry-mixed mortar and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107651919A (en) * | 2017-09-30 | 2018-02-02 | 东南大学 | A kind of regeneration brick aggregate concrete and preparation method thereof |
| CN109265107A (en) * | 2018-10-29 | 2019-01-25 | 中国建材检验认证集团北京天誉有限公司 | A method of control regenerated aggregate concrete is shunk |
| 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 |
-
2021
- 2021-03-26 CN CN202110328384.XA patent/CN112876175A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107651919A (en) * | 2017-09-30 | 2018-02-02 | 东南大学 | A kind of regeneration brick aggregate concrete and preparation method thereof |
| CN109265107A (en) * | 2018-10-29 | 2019-01-25 | 中国建材检验认证集团北京天誉有限公司 | A method of control regenerated aggregate concrete is shunk |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113831089A (en) * | 2021-10-18 | 2021-12-24 | 山东理工大学 | Cement concrete curb containing brick-concrete building garbage recycled aggregate and preparation method thereof |
| CN114195437A (en) * | 2021-11-15 | 2022-03-18 | 北京建工资源循环利用投资有限公司 | Recycled concrete replaced by brick-concrete recycled coarse aggregate and preparation method thereof |
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