CN116813229A - Ecological high-quality utilization method for concrete solid waste - Google Patents
Ecological high-quality utilization method for concrete solid waste Download PDFInfo
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- CN116813229A CN116813229A CN202310852231.4A CN202310852231A CN116813229A CN 116813229 A CN116813229 A CN 116813229A CN 202310852231 A CN202310852231 A CN 202310852231A CN 116813229 A CN116813229 A CN 116813229A
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- waste
- particle size
- aggregate
- crushing
- concrete
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- 239000004567 concrete Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002910 solid waste Substances 0.000 title claims abstract description 23
- 239000002699 waste material Substances 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 8
- 238000001354 calcination Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 7
- 230000036571 hydration Effects 0.000 claims abstract description 7
- 238000006703 hydration reaction Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 3
- 235000019738 Limestone Nutrition 0.000 claims description 11
- 239000006028 limestone Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000004566 building material Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000010847 non-recyclable waste Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The application belongs to the technical field of construction waste treatment, and particularly relates to a concrete solid waste ecological high-quality utilization method, which comprises the following steps: crushing, namely crushing the waste concrete map and separating aggregate and cement components; step 2: screening, namely screening the waste building concrete subjected to primary breaking by a linear vibration feeder according to the particle size of 100mm to obtain aggregate with the particle size of more than 100mm and aggregate with the particle size of less than 100 mm: step 3: secondary crushing, namely crushing the aggregate with the particle size of more than 100mm again: step 4: a secondary powder sieve, classifying the finished products obtained by crushing in the step 1 and the step three according to the particle size; step 5: the cement component separated in the step 1 is processed by utilizing a low-temperature calcination process, so that the regenerated cementing material with hydration activity can be prepared, the structure is reasonable, the treatment mode of waste concrete is widened in the use process, the recycling rate of the waste concrete is improved, the resource waste can be prevented, and meanwhile, the secondary pollution can also be prevented.
Description
Technical Field
The application relates to the technical field of construction waste treatment, in particular to a concrete solid waste ecological high-quality utilization method.
Background
The construction waste is produced in about 30 hundred million tons per year in China, most of the construction waste is transported to suburbs or villages by construction units without any treatment, and is piled up or buried in open air, so that not only is a large amount of construction expenses such as land expenses and garbage cleaning and transporting expenses consumed, but also the problems of scattering, dust and ash flying and the like in the cleaning and piling process are caused, and serious environmental pollution is caused. Concrete is used as a building material with the maximum consumption of human beings, and the theory and technology of the concrete are gradually matured. However, a large amount of concrete is applied and has negative influence on the living environment and the ecological system, a large amount of concrete is abandoned by urban removal and engineering transformation, a large amount of land resources are wasted by the treatment of the abandoned concrete, and the environment is polluted. The recycled concrete which has been developed against such a disadvantage is now widely used for foundation reinforcement and road engineering, and the present situation of recycling waste concrete and some problems thereof are discussed.
With the vigorous development of the building industry, the demand of building materials in China is rapidly increased. At present, the demand of concrete worldwide is about 28 hundred million m3, and the annual demand of concrete in China reaches 13 hundred million-14 hundred million m3, accounting for 45 percent of the total world. In the concrete raw materials, the aggregate accounts for about 75% of the total amount of the concrete, and the aggregate is mainly obtained by mountain-cutting and stone-taking, and processing the aggregate into sand and stone materials, or by digging sand, pebbles and gravels in a river channel. Thus, the natural environment is destroyed, and the sustainable development of the building industry is also seriously affected. Cement and sand are consumed for producing concrete, and a large amount of carbon dioxide, sulfides, nitrides and other harmful gases and dust are discharged for producing cement. According to incomplete statistics, the building waste generated in China at present is about 1 hundred million t each year, and the building waste accumulated for a long time is up to hundreds of hundred million tons. The sources of waste concrete are wide and the quantity is also quite remarkable. Most of the waste concrete is not treated, and is piled up in open air, and is buried in the low-lying places of the land, so that serious environmental pollution and resource waste are caused. The waste water is transported to suburb for burial, which not only costs a great deal of freight but also causes secondary pollution. If the waste concrete is recycled after being collected and processed, natural resources can be saved, environmental pollution is reduced, and social and economic development is promoted.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been made in view of the problems occurring in the prior art.
Therefore, the application aims to provide the concrete solid waste ecological high-quality utilization method, which can widen the treatment mode of waste concrete in the use process, improve the recycling rate of the waste concrete, prevent resource waste and prevent secondary pollution.
In order to solve the technical problems, according to one aspect of the present application, the following technical solutions are provided:
a concrete solid waste ecological high-quality utilization method comprises the following steps:
step 1: crushing, namely crushing the waste concrete map and separating aggregate and cement components;
step 2: screening, namely screening the waste building concrete subjected to primary breaking by a linear vibration feeder according to the particle size of 100mm to obtain aggregate with the particle size of more than 100mm and aggregate with the particle size of less than 100 mm:
step 3: secondary crushing, namely crushing the aggregate with the particle size of more than 100mm again:
step 4: a secondary powder sieve, classifying the finished products obtained by crushing in the step 1 and the step three according to the particle size;
step 5: processing the cement component separated in the step 1 by using a low-temperature calcination process to prepare a regenerated cementing material with hydration activity;
step 6: limestone in the aggregate is separated out to replace natural limestone to be used as a calcareous raw material for preparing cement raw materials, so that the limestone can play a role in serving as a part of siliceous raw materials;
step 7: according to the recycled aggregate with different particle size ranges obtained by classification in the step 4, producing concrete, mortar, building blocks, wallboards and floor tile building material products with corresponding strength grades;
step 8: and carrying out centralized conveying and cleaning on the unusable waste.
As a preferable scheme of the concrete solid waste ecological high-quality utilization method, the application comprises the following steps: in the step 1, the blocky steel bars, the wooden blocks and the sundries in the blocky steel bars need to be picked up in advance.
As a preferable scheme of the concrete solid waste ecological high-quality utilization method, the application comprises the following steps: in the step 3, a jaw crusher is selected for crushing again, and the crushing ratio of the jaw crusher is 3-4.
As a preferable scheme of the concrete solid waste ecological high-quality utilization method, the application comprises the following steps: in the step 4, four kinds of recycled aggregate with different particle size ranges of 0-5mm, 5.0-16.0mm, 16.0-25.0mm and 25.0-31.5mm are obtained by classification.
As a preferable scheme of the concrete solid waste ecological high-quality utilization method, the application comprises the following steps: in the step 5, the hydration activity of the regenerated cementing material prepared by calcining at 650 ℃ is highest.
As a preferable scheme of the concrete solid waste ecological high-quality utilization method, the application comprises the following steps: in the step 6, the content of the limestone in the aggregate is 75-80%.
As a preferable scheme of the concrete solid waste ecological high-quality utilization method, the application comprises the following steps: in the step 7, after the solidified material is added into the coarse and fine aggregates, the coarse and fine aggregates can be also used for the road surface base layer.
As a preferable scheme of the concrete solid waste ecological high-quality utilization method, the application comprises the following steps: the non-recyclable waste in the step 8 comprises waste glass, waste plastic and waste ceramic.
Compared with the prior art, the application has the beneficial effects that: the method can widen the treatment mode of the waste concrete in the use process, improve the recycling rate of the waste concrete, prevent the resource waste and prevent secondary pollution.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present application, and from which other drawings can be obtained by those skilled in the art without inventive faculty. Wherein:
FIG. 1 is a schematic diagram of the flow structure of the steps of the present application.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Next, the present application will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The application provides the following technical scheme: the ecological high-quality utilization method of the concrete solid waste widens the treatment mode of the waste concrete in the use process, improves the recycling rate of the waste concrete, can prevent resource waste and secondary pollution at the same time;
example 1
A concrete solid waste ecological high-quality utilization method comprises the following steps:
step 1: crushing, namely crushing the waste coagulation map, separating aggregate and cement components, and picking up blocky steel bars, wood blocks and sundries in the waste coagulation map in advance;
step 2: screening, namely screening the waste building concrete subjected to primary breaking by a linear vibration feeder according to the particle size of 100mm to obtain aggregate with the particle size of more than 100mm and aggregate with the particle size of less than 100 mm:
step 3: secondary crushing, namely re-crushing the aggregate with the particle size larger than 100mm, wherein a jaw crusher is selected for re-crushing, and the crushing ratio of the jaw crusher is 3-4:
step 4: classifying the finished products obtained by crushing the step 1 and the step three according to particle sizes to obtain four kinds of recycled aggregate with different particle size ranges of 0-5mm, 5.0-16.0mm, 16.0-25.0mm and 25.0-31.5 mm;
step 5: the cement component separated in the step 1 is processed by utilizing a low-temperature calcination process, so that the regenerated cementing material with hydration activity can be prepared, and the hydration activity of the regenerated cementing material prepared by calcination at 650 ℃ is highest;
step 6: separating limestone from aggregate, replacing natural limestone as a calcareous raw material to prepare cement raw material, which can play a role in preparing part of siliceous raw material, wherein the content of limestone in the aggregate is 75% -80%;
step 7: according to the recycled aggregate with different particle size ranges obtained by classification in the step 4, producing concrete, mortar, building blocks, wallboards and floor tile building material products with corresponding strength grades, wherein after the coarse and fine aggregates are added with solidified materials, the coarse and fine aggregates can also be used for a road pavement base layer;
step 8: the unusable waste materials are conveyed and cleaned in a concentrated way, and the unusable waste materials comprise waste glass, waste plastics and waste ceramics.
Although the application has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. A concrete solid waste ecological high-quality utilization method is characterized in that: the method comprises the following steps:
step 1: crushing, namely crushing the waste concrete map and separating aggregate and cement components;
step 2: screening, namely screening the waste building concrete subjected to primary breaking by a linear vibration feeder according to the particle size of 100mm to obtain aggregate with the particle size of more than 100mm and aggregate with the particle size of less than 100 mm:
step 3: secondary crushing, namely crushing the aggregate with the particle size of more than 100mm again:
step 4: a secondary powder sieve, classifying the finished products obtained by crushing in the step 1 and the step three according to the particle size;
step 5: processing the cement component separated in the step 1 by using a low-temperature calcination process to prepare a regenerated cementing material with hydration activity;
step 6: limestone in the aggregate is separated out to replace natural limestone to be used as a calcareous raw material for preparing cement raw materials, so that the limestone can play a role in serving as a part of siliceous raw materials;
step 7: according to the recycled aggregate with different particle size ranges obtained by classification in the step 4, producing concrete, mortar, building blocks, wallboards and floor tile building material products with corresponding strength grades;
step 8: and carrying out centralized conveying and cleaning on the unusable waste.
2. The method for ecologically improving and utilizing concrete solid waste according to claim 1, which is characterized in that: in the step 1, the blocky steel bars, the wooden blocks and the sundries in the blocky steel bars need to be picked up in advance.
3. The method for ecologically improving and utilizing concrete solid waste according to claim 1, which is characterized in that: in the step 3, a jaw crusher is selected for crushing again, and the crushing ratio of the jaw crusher is 3-4.
4. The method for ecologically improving and utilizing concrete solid waste according to claim 1, which is characterized in that: in the step 4, four kinds of recycled aggregate with different particle size ranges of 0-5mm, 5.0-16.0mm, 16.0-25.0mm and 25.0-31.5mm are obtained by classification.
5. The method for ecologically improving and utilizing concrete solid waste according to claim 1, which is characterized in that: in the step 5, the hydration activity of the regenerated cementing material prepared by calcining at 650 ℃ is highest.
6. The method for ecologically improving and utilizing concrete solid waste according to claim 1, which is characterized in that: in the step 6, the content of the limestone in the aggregate is 75-80%.
7. The method for ecologically improving and utilizing concrete solid waste according to claim 1, which is characterized in that: in the step 7, after the solidified material is added into the coarse and fine aggregates, the coarse and fine aggregates can be also used for the road surface base layer.
8. The method for ecologically improving and utilizing concrete solid waste according to claim 1, which is characterized in that: the non-recyclable waste in the step 8 comprises waste glass, waste plastic and waste ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852231.4A CN116813229A (en) | 2023-07-12 | 2023-07-12 | Ecological high-quality utilization method for concrete solid waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852231.4A CN116813229A (en) | 2023-07-12 | 2023-07-12 | Ecological high-quality utilization method for concrete solid waste |
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| Publication Number | Publication Date |
|---|---|
| CN116813229A true CN116813229A (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310852231.4A Withdrawn CN116813229A (en) | 2023-07-12 | 2023-07-12 | Ecological high-quality utilization method for concrete solid waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117608188A (en) * | 2024-01-24 | 2024-02-27 | 福建南方路面机械股份有限公司 | Recycled aggregate production method and device based on fuzzy control |
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2023
- 2023-07-12 CN CN202310852231.4A patent/CN116813229A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117608188A (en) * | 2024-01-24 | 2024-02-27 | 福建南方路面机械股份有限公司 | Recycled aggregate production method and device based on fuzzy control |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230929 |
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| WW01 | Invention patent application withdrawn after publication |