CN112299795A - Recycled concrete and preparation method thereof - Google Patents
Recycled concrete and preparation method thereof Download PDFInfo
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- CN112299795A CN112299795A CN202011339667.6A CN202011339667A CN112299795A CN 112299795 A CN112299795 A CN 112299795A CN 202011339667 A CN202011339667 A CN 202011339667A CN 112299795 A CN112299795 A CN 112299795A
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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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
Abstract
The invention discloses recycled concrete and a preparation method thereof, which belong to the technical field of building materials and mainly comprise the following components in parts by weight: 100-120 parts of cement, 40-60 parts of water, 270-410 parts of waste concrete recycled coarse aggregate, 111-220 parts of waste concrete recycled fine aggregate and 1-4 parts of composite additive, and can effectively solve the problems of low utilization rate of waste concrete, complex process, poor durability and substandard strength grade of the recycled concrete in the existing recycled concrete technology.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to recycled concrete and a preparation method thereof.
Background
At present, the economy of China is rapidly developed, urban public and civil buildings and municipal facilities are greatly updated and transformed, and a large number of old buildings are dismantled, so that a large amount of waste concrete is generated. On one hand, the waste concrete is used as waste materials generated by building construction and demolition of waste buildings, which not only brings serious environmental problems, but also causes huge resource waste; on the other hand, the concrete is used in large quantity to cause raw materials such as natural river sand, quartz sand and the like, so that a large amount of mineral resources are consumed, and the natural resources are increasingly in short supply. Therefore, in order to meet the requirements of the economic strategy of green energy-saving sustainable development and realize sustainable development of the concrete industry, proper utilization of waste concrete processing products is imperative in the concrete industry.
The recycled concrete technology is one of the main measures for developing green concrete and realizing sustainable development of buildings, resources and environments, and is increasingly paid attention by people. However, the existing recycled concrete technology has the problems of low utilization rate of waste concrete, complex process and substandard strength grade of recycled concrete. In view of this, it would be very significant to provide a recycled concrete prepared from waste concrete and a preparation method thereof.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the invention aims to provide recycled concrete and a preparation method thereof, which can effectively solve the problems of low utilization rate of waste concrete, complex process, poor durability and unqualified strength grade of the recycled concrete in the prior recycled concrete technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides recycled concrete which comprises the following components in parts by weight: 100-120 parts of cement, 40-60 parts of water, 270-410 parts of waste concrete recycled coarse aggregate, 111-220 parts of waste concrete recycled fine aggregate and 1-4 parts of a composite additive;
the composite additive comprises the following components in parts by weight: 25-35 parts of a water reducing agent, 1-5 parts of phosphate, 1-5 parts of a surface active assistant, 5-10 parts of modified rice hull ash, 1-3 parts of a viscosity regulator and 20-50 parts of water.
Further, the cement is portland cement, preferably P · O42.5 portland cement.
Further, the modified rice hull ash is prepared by the following method:
(1) adding the rice hulls into 0.5-1 mol/L HCl solution, soaking for 2-4 hours, and then washing and drying;
(2) putting the rice hulls obtained in the step (1) into a muffle furnace, heating the rice hulls from room temperature to 100-110 ℃, keeping the temperature for 10-15 minutes at a heating rate of 5-10 ℃/min, continuously heating to 700-850 ℃, keeping the temperature for 1-3 hours at a heating rate of 20-30 ℃/min, cooling to room temperature, and grinding to obtain fine powder with the fineness of 600-1200 meshes;
(3) mixing the fine powder obtained in the step (2) with TiO2Nanoparticles and Fe2O3Adding the nanoparticles into a polyethylene glycol aqueous solution according to the weight ratio of 1-5: 1-2, stirring, centrifuging, filtering, washing with water, and drying to obtain the modified rice hull ash.
Further, the recycled concrete comprises the following components in parts by weight: 100 parts of cement, 45 parts of water, 300 parts of waste concrete recycled coarse aggregate, 130 parts of waste concrete recycled fine aggregate and 1 part of composite admixture.
Further, the water reducing agent is a polycarboxylic acid water reducing agent.
Further, the phosphate is a mixture of one or more of potassium dihydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate and disodium hydrogen phosphate.
Further, the viscosity regulator is formed by mixing emulsion powder and a cellulose tackifier according to a weight ratio of 1-5: 1-2, and preferably the emulsion powder and hydroxyethyl cellulose are mixed according to a weight ratio of 2: 1.
Further, the surface active auxiliary agent is sodium lignosulfonate, sodium dodecyl sulfate or sodium dodecyl benzene sulfonate, preferably sodium lignosulfonate.
Further, the composite admixture comprises the following components in parts by weight: 25 parts of water reducing agent, 1 part of phosphate, 2 parts of surface active additive, 5 parts of modified rice hull ash, 2 parts of viscosity regulator and 30 parts of water.
Further, the composite admixture is prepared by the following method:
and (2) mixing phosphate and the modified rice hull ash, adding water, performing ultrasonic dispersion for 10-20 minutes, adding a water reducing agent, a surface active auxiliary agent and a viscosity regulator, and stirring for 20-30 minutes to obtain the modified rice hull ash.
The invention has the beneficial effects that: the rice hulls after the hydrochloric acid treatment of the rice hulls are calcined at high temperature and ground to obtain ground powder, so that the rice hulls have larger specific surface area and rich pore structure, can be used as carriers of metal nano particles, and can also enhance the strength of cement mortar in a formula of a composite additive; the composite additive used in the invention is modified rice hull ash rich in SiO2The cement slurry has a porous structure, not only has physical adsorption, but also has the synergistic effect of physical adsorption of water reducing agent, surface active auxiliary agent, viscosity regulator and the like through chemical combination of intermolecular hydrogen bonds and the electrostatic effect among metal ions, and the cement slurry is kept stable for a long time through the synergistic effect among the components in the formula, such as the water reducing agent, the surface active auxiliary agent, the viscosity regulator, the modified rice hull ash and the like, so that the durability of the recycled concrete is improved, and the recycled concrete has the characteristic of high strength. The invention is reasonably and scientifically matched, and the problems of poor durability and substandard strength grade of the recycled concrete prepared by the existing recycled concrete technology can be effectively solved through the recycled concrete prepared from the specific components.
The preparation method of the recycled concrete comprises the following steps:
step (1): crushing the waste concrete blocks in a stepless matching manner, and screening to obtain waste concrete recycled coarse aggregate and waste concrete recycled fine aggregate; wherein the particle size of the waste concrete recycled coarse aggregate is more than 4.75mm, and the particle size of the waste concrete recycled fine aggregate is less than 4.75 mm;
step (2): and (2) stirring cement, water, the recycled coarse aggregate of the waste concrete obtained in the step (1), the recycled fine aggregate of the waste concrete obtained in the step (1) and the composite additive according to a weight ratio to prepare the recycled concrete.
Further, the particle size of the recycled coarse aggregate of the waste concrete in the step (1) is larger than 4.75mm, and the particle size of the recycled fine aggregate of the waste concrete is smaller than 4.75 mm;
further, in the step (2), cement, the waste concrete recycled coarse aggregate obtained in the step (1) and the waste concrete recycled fine aggregate obtained in the step (1) are stirred for 2-5 minutes to prepare a dry mixture; and adding the composite admixture into water, stirring and dissolving to obtain a solution, adding the dry mixture into the solution, and stirring for 2-5 minutes to obtain the recycled concrete.
The invention has the beneficial effects that: the method carries out stepless proportioning crushing on the waste concrete, has simple process, simple and easily obtained required raw materials, and has practical industrial application value; the utilization rate of the waste concrete recycled coarse aggregate and the waste concrete recycled fine aggregate is 100%, the stress performance of the recycled concrete is further improved, and the strength grade of the recycled concrete prepared reaches the standard.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be purely exemplary of the invention and are not intended to be limiting.
Example 1
The embodiment 1 provides recycled concrete, which comprises the following components in parts by weight: 100 parts of P.O 42.5 Portland cement, 60 parts of water, 410 parts of waste concrete recycled coarse aggregate, 220 parts of waste concrete recycled fine aggregate and 1 part of composite additive;
the composite additive comprises the following components in parts by weight: 25 parts of polycarboxylic acid water reducing agent, 1 part of monopotassium phosphate, 2 parts of sodium lignosulfonate, 5 parts of modified rice hull ash, 2 parts of viscosity regulator and 30 parts of water.
The viscosity regulator is formed by mixing emulsion powder and hydroxyethyl cellulose according to the weight ratio of 2: 1.
The composite additive is prepared by the following method:
mixing potassium dihydrogen phosphate and the modified rice hull ash, adding water, performing ultrasonic dispersion for 15 minutes, adding a polycarboxylic acid water reducing agent, sodium lignosulfonate and a viscosity regulator, and stirring for 30 minutes to obtain the modified rice hull ash.
The modified rice hull ash is prepared by the following method:
(1) adding the rice hulls into 0.5-1 mol/L HCl solution, soaking for 2-4 hours, and then washing and drying;
(2) putting the rice hulls obtained in the step (1) into a muffle furnace, heating the rice hulls from room temperature to 105 ℃, keeping the temperature at a heating rate of 10 ℃/min for 15 minutes, heating the rice hulls to 800 ℃, keeping the temperature at a heating rate of 30 ℃/min for 3 hours, cooling the rice hulls to room temperature, and grinding the rice hulls to obtain ground powder with the fineness of 600-1200 meshes;
(2) mixing the fine powder obtained in the step (2) with TiO2Nanoparticles and Fe2O3Adding the nano particles into a polyethylene glycol aqueous solution according to the weight ratio of 4:1:1, stirring for 24 hours, centrifuging, filtering, washing for 3 times, and drying for 24 hours at 90 ℃ to obtain the modified rice hull ash.
The preparation method of the recycled concrete specifically comprises the following steps:
step (1): crushing the waste concrete blocks in a stepless matching manner, and screening to obtain waste concrete recycled coarse aggregate and waste concrete recycled fine aggregate; wherein the particle size of the waste concrete recycled coarse aggregate is more than 4.75mm, and the particle size of the waste concrete recycled fine aggregate is less than 4.75 mm;
step (2): stirring cement, the waste concrete recycled coarse aggregate obtained in the step (1) and the waste concrete recycled fine aggregate obtained in the step (1) for 2 minutes to prepare a dry mixture;
and (3): and adding the composite admixture into water, stirring and dissolving to obtain a solution, adding the dry mixture into the solution, and stirring for 2 minutes to obtain the recycled concrete.
Example 2
This example 2 provides a recycled concrete and a method for preparing the same, which are different from those of example 1 only in that: the recycled concrete comprises 100 parts by weight of P & O42.5 Portland cement, 56 parts by weight of water, 380 parts by weight of recycled waste concrete coarse aggregate, 196 parts by weight of recycled waste concrete fine aggregate and 1 part by weight of composite admixture.
Example 3
This example 3 provides a recycled concrete and a method for preparing the same, which are different from those of example 1 only in that: the recycled concrete comprises 100 parts by weight of P & O42.5 Portland cement, 52 parts by weight of water, 350 parts by weight of recycled coarse aggregate of waste concrete, 172 parts by weight of recycled fine aggregate of waste concrete and 1 part by weight of composite admixture.
Example 4
This example 4 provides a recycled concrete and a method for preparing the same, which are different from those of example 1 only in that: the recycled concrete comprises 100 parts by weight of P & O42.5 Portland cement, 48 parts by weight of water, 326 parts by weight of recycled coarse aggregate of waste concrete, 154 parts by weight of recycled fine aggregate of waste concrete and 1 part by weight of composite additive.
Example 5
This example 5 provides a recycled concrete and a method for preparing the same, which are different from those of example 1 only in that: the recycled concrete comprises 100 parts by weight of P & O42.5 Portland cement, 45 parts by weight of water, 302 parts by weight of recycled coarse aggregate of waste concrete, 136 parts by weight of recycled fine aggregate of waste concrete and 1 part by weight of a composite additive.
Comparative example 1
The comparative example 1 provides recycled concrete and a preparation method thereof, and specifically comprises the following steps:
step (1): crushing the waste concrete blocks in a stepless matching manner, and screening to obtain waste concrete recycled coarse aggregate and waste concrete recycled fine aggregate; wherein the particle size of the waste concrete recycled coarse aggregate is more than 4.75mm, and the particle size of the waste concrete recycled fine aggregate is less than 4.75 mm;
step (2): stirring P & O42.5 portland cement, the waste concrete recycled coarse aggregate obtained in the step (1) and the waste concrete recycled fine aggregate obtained in the step (1) for 2 minutes to prepare a dry mixture, and adding water into the dry mixture to stir for 2 minutes to prepare recycled concrete; wherein the weight ratio of the added P & O42.5 Portland cement, water, the recycled coarse aggregate of the waste concrete and the recycled fine aggregate of the waste concrete is 100:61:410: 221.
Comparative example 2
The present comparative example 2 provides a recycled concrete and a preparation method thereof, which are different from the comparative example 1 only in that: the weight part ratio of the P & O42.5 Portland cement, the water, the waste concrete recycled coarse aggregate and the waste concrete recycled fine aggregate added in the step (2) is 100:52:350: 172.
Comparative example 3
This comparative example 3 provides a recycled concrete and a method for preparing the same, which are different from comparative example 1 only in that: the weight part ratio of the P & O42.5 Portland cement, the water, the waste concrete recycled coarse aggregate and the waste concrete recycled fine aggregate added in the step (2) is 100:45:303: 136.
Comparative example 4
This comparative example 4 provides a recycled concrete and a method for preparing the same, which are different from example 1 only in that: the composite admixture used in this comparative example 4 was different.
The composite admixture used in comparative example 4 comprises the following components in parts by weight: 25 parts of polycarboxylic acid water reducing agent, 1 part of monopotassium phosphate, 2 parts of sodium lignosulfonate, 2 parts of latex powder and 30 parts of water.
The composite additive is prepared by the following method:
dissolving potassium dihydrogen phosphate in water, performing ultrasonic treatment for 15 minutes, adding a polycarboxylic acid water reducing agent, sodium lignosulfonate and latex powder, and stirring for 30 minutes to obtain the water-soluble organic fertilizer.
Experimental example 1
In order to examine the properties of the recycled concrete prepared by the present invention, the compressive strength test was performed on the test blocks of the 7d and 28d aged recycled concrete of examples 1 to 5 and the test blocks of the comparative examples 1 to 3 according to the Standard for testing mechanical Properties of general concrete (GB/T50081-2002), and the test results are shown in Table 1.
TABLE 1 test results of mechanical Properties of recycled concrete of examples 1 to 5 and comparative examples 1 to 4
As can be seen from Table 1, the comparative examples 1 to 3, in which the composite admixture was not added, had poorer compressive strength than comparative example 4; the composite admixture added in comparative example 4, which mainly did not include the modified rice hull ash component, also had a reduced compressive strength as compared with examples 1 to 5. In conclusion, the concrete of examples 1 to 5 has the characteristics of obviously improved compressive strength and high compressive strength in the age of 7d and 28d compared with the concrete of comparative examples 1 to 4, and meets the requirement of concrete strength grade.
The foregoing is merely exemplary and illustrative of the present invention and it is within the purview of one skilled in the art to modify or supplement the embodiments described or to substitute similar ones without the exercise of inventive faculty, and still fall within the scope of the claims.
Claims (10)
1. The recycled concrete is characterized by comprising the following components in parts by weight: 100-120 parts of cement, 40-60 parts of water, 270-410 parts of waste concrete recycled coarse aggregate, 111-220 parts of waste concrete recycled fine aggregate and 1-4 parts of a composite additive;
the composite additive comprises the following components in parts by weight: 25-35 parts of a water reducing agent, 1-5 parts of phosphate, 1-5 parts of a surface active assistant, 5-10 parts of modified rice hull ash, 1-3 parts of a viscosity regulator and 20-50 parts of water.
2. The recycled concrete of claim 1, comprising the following components in parts by weight: 100 parts of cement, 45 parts of water, 300 parts of waste concrete recycled coarse aggregate, 130 parts of waste concrete recycled fine aggregate and 1 part of composite admixture.
3. The recycled concrete of claim 1 or 2, wherein the water-reducing agent is a polycarboxylic acid water-reducing agent.
4. The recycled concrete of claim 1 or 2, wherein the phosphate is a mixture of one or more of potassium dihydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate and disodium hydrogen phosphate.
5. The recycled concrete of claim 1 or 2, wherein the viscosity modifier is a mixture of latex powder and a cellulose tackifier in a weight ratio of 1-5: 1-2.
6. The recycled concrete of claim 1 or 2, wherein the surface-active adjuvant is sodium lignosulfonate, sodium dodecylsulfate or sodium dodecylbenzenesulfonate.
7. The recycled concrete of claim 1 or 2, wherein the modified rice hull ash is produced by the following method:
(1) adding the rice hulls into 0.5-1 mol/L HCl solution, soaking for 2-4 hours, and then washing and drying;
(2) putting the rice hulls obtained in the step (1) into a muffle furnace, heating the rice hulls from room temperature to 100-110 ℃, keeping the temperature for 10-15 minutes at a heating rate of 5-10 ℃/min, continuously heating to 700-850 ℃, keeping the temperature for 1-3 hours at a heating rate of 20-30 ℃/min, cooling to room temperature, and grinding to obtain fine powder with the fineness of 600-1200 meshes;
(3) mixing the fine powder obtained in the step (2) with TiO2Nanoparticles and Fe2O3Adding the nanoparticles into a polyethylene glycol aqueous solution according to the weight ratio of 1-5: 1-2, stirring, centrifuging, filtering, washing with water, and drying to obtain the modified rice hull ash.
8. The recycled concrete of claim 1 or 2, wherein the composite admixture is prepared by the following method:
and (2) mixing phosphate and the modified rice hull ash, adding water, performing ultrasonic dispersion for 10-20 minutes, adding a water reducing agent, a surface active auxiliary agent and a viscosity regulator, and stirring for 20-30 minutes to obtain the modified rice hull ash.
9. The method for the preparation of recycled concrete according to any one of claims 1 to 8, comprising in particular the following steps:
step (1): crushing the waste concrete blocks in a stepless matching manner, and screening to obtain waste concrete recycled coarse aggregate and waste concrete recycled fine aggregate;
step (2): and (2) stirring cement, water, the recycled coarse aggregate of the waste concrete obtained in the step (1), the recycled fine aggregate of the waste concrete obtained in the step (1) and the composite additive according to a weight ratio to prepare the recycled concrete.
10. The method for preparing recycled concrete according to claim 9, wherein the particle size of the recycled coarse aggregate of the waste concrete in the step (1) is more than 4.75mm, and the particle size of the recycled fine aggregate of the waste concrete is less than 4.75 mm; in the step (2), firstly, stirring cement, the waste concrete recycled coarse aggregate obtained in the step (1) and the waste concrete recycled fine aggregate obtained in the step (1) for 2-5 minutes to prepare a dry mixture; and adding the composite admixture into water, stirring and dissolving to obtain a solution, adding the dry mixture into the solution, and stirring for 2-5 minutes to obtain the recycled concrete.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113024199A (en) * | 2021-03-23 | 2021-06-25 | 广州市长运预拌混凝土有限公司 | Recycled concrete prepared from waste building concrete and preparation method thereof |
| CN113213883A (en) * | 2021-05-24 | 2021-08-06 | 四川交通职业技术学院 | Reclaimed water stabilizing material prepared from waste earthwork and construction method thereof |
| CN115259735A (en) * | 2022-07-14 | 2022-11-01 | 武汉三源特种建材有限责任公司 | Viscosity-reducing phase-change material for concrete and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936120A (en) * | 2012-11-16 | 2013-02-20 | 江苏大学 | Recycled aggregate type permeable ecological concrete and preparation method thereof |
| CN105130299A (en) * | 2015-08-20 | 2015-12-09 | 浙江工业大学 | In-situ reinforcement method of recycled aggregate |
| CN106431106A (en) * | 2016-08-30 | 2017-02-22 | 许昌金科资源再生股份有限公司 | Recycled concrete prepared from recycled aggregate |
| CN107640939A (en) * | 2017-09-27 | 2018-01-30 | 北京首钢资源综合利用科技开发公司 | A kind of spray anchor concrete prepared using building waste |
| CN109534758A (en) * | 2018-12-29 | 2019-03-29 | 浙江春天建设有限公司 | A kind of cement concrete reproduction construction method |
| WO2019135720A1 (en) * | 2018-01-03 | 2019-07-11 | Natchrungsunkh Phanawisittha | Method of solving the separation problem of concrete and reinforced bamboo in bamboo-reinforced concrete by using waterproof concrete |
| CN111056794A (en) * | 2019-12-17 | 2020-04-24 | 深圳市恒星建材有限公司 | Ecological nano photocatalytic recycled concrete and preparation method thereof |
-
2020
- 2020-11-25 CN CN202011339667.6A patent/CN112299795B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936120A (en) * | 2012-11-16 | 2013-02-20 | 江苏大学 | Recycled aggregate type permeable ecological concrete and preparation method thereof |
| CN105130299A (en) * | 2015-08-20 | 2015-12-09 | 浙江工业大学 | In-situ reinforcement method of recycled aggregate |
| CN106431106A (en) * | 2016-08-30 | 2017-02-22 | 许昌金科资源再生股份有限公司 | Recycled concrete prepared from recycled aggregate |
| CN107640939A (en) * | 2017-09-27 | 2018-01-30 | 北京首钢资源综合利用科技开发公司 | A kind of spray anchor concrete prepared using building waste |
| WO2019135720A1 (en) * | 2018-01-03 | 2019-07-11 | Natchrungsunkh Phanawisittha | Method of solving the separation problem of concrete and reinforced bamboo in bamboo-reinforced concrete by using waterproof concrete |
| CN109534758A (en) * | 2018-12-29 | 2019-03-29 | 浙江春天建设有限公司 | A kind of cement concrete reproduction construction method |
| CN111056794A (en) * | 2019-12-17 | 2020-04-24 | 深圳市恒星建材有限公司 | Ecological nano photocatalytic recycled concrete and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| T.R. PRAVEENKUMAR, ET AL.: "Strengths and durability performances of blended cement concrete with TiO2 nanoparticles and rice husk ash", 《CONSTRUCTION AND BUILDING MATERIALS》 * |
| 汪知文等: "稻壳灰应用于水泥混凝土的研究进展", 《材料导报（A）》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113024199A (en) * | 2021-03-23 | 2021-06-25 | 广州市长运预拌混凝土有限公司 | Recycled concrete prepared from waste building concrete and preparation method thereof |
| CN113213883A (en) * | 2021-05-24 | 2021-08-06 | 四川交通职业技术学院 | Reclaimed water stabilizing material prepared from waste earthwork and construction method thereof |
| CN115259735A (en) * | 2022-07-14 | 2022-11-01 | 武汉三源特种建材有限责任公司 | Viscosity-reducing phase-change material for concrete and preparation method and application thereof |
| CN115259735B (en) * | 2022-07-14 | 2023-08-11 | 武汉三源特种建材有限责任公司 | Viscosity-reducing phase-change material for concrete and preparation method and application thereof |
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| CN112299795B (en) | 2022-05-17 |
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