Renewable concrete and production process thereof

Abstract

The invention relates to the technical field of renewable concrete, in particular to renewable concrete and a production process thereof, and the concrete is prepared from the following raw materials: recycled aggregate, waste plastic fiber, cement, an additive component and water, the production work comprises the following steps: recycling, crushing and classifying the building waste, crushing and grinding the building concrete waste and storing the building concrete waste as aggregate, screening and storing other materials required by concrete preparation, stirring and mixing, storing the concrete, and conveying the concrete into a mixer truck for transferring. By using the recycled aggregate and the waste plastic fiber, the waste building material and corresponding plastic can be effectively recycled and used, the environmental protection performance can be better improved, the waste material can be quickly solved, and the strength and performance of the product can be improved; and meanwhile, how to use each device and how to prepare the recycled concrete by workers are clearly indicated.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable concrete, and in particular to renewable concrete and a production process thereof. Background Art

[0002] Since there are certain differences in performance between the recycled aggregates formed by crushing waste concrete and other construction waste and the natural aggregates, the recycled aggregates generally have a rough surface and many edges and corners. During the production process, the recycled aggregates are subjected to large external forces, and a large number of fine cracks will appear inside, making the water absorption rate and water absorption rate of the recycled aggregates greater than those of natural aggregates. During the curing process of concrete made from such recycled aggregates, the different water contents between aggregates and between the inner and outer layers of the concrete will cause different shrinkage degrees of the concrete, which will lead to cracks in the concrete, resulting in defects such as low strength, low flexural strength and easy cracking.

[0003] In order to address the above defects, existing related technologies enhance the strength of renewable concrete by adding steel fibers. However, since the surface of steel fibers is relatively smooth, the friction with the recycled aggregate is small, and the bonding force between the steel fibers and the gel material is low, the concrete is prone to cracking.

[0004] A renewable concrete and its production process with publication number CN112250379B, the renewable concrete is mainly made of the following raw materials in parts by weight: 500-1000 parts of recycled aggregate, 200-500 parts of sand, 350-450 parts of cement, 0.2-0.8 parts of viscose fiber, 0.1-0.5 parts of polyester fiber, 0.1-0.3 parts of polyurethane fiber, 5-20 parts of water reducer, 150-200 parts of water. The production process of the renewable concrete of the present application includes: step 1, mixing the recycled aggregate, sand, cement and water evenly to form a slurry; step 2, mixing the viscose fiber, polyester fiber, polyurethane fiber and water reducer evenly with the slurry in step 1. The renewable concrete has the advantages of high strength, crack resistance and bending resistance.

[0005] Existing renewable concrete has the advantages of high strength, crack resistance and bending resistance, but it cannot fully improve the efficiency of preparation, and conventional recycled aggregates cannot be effectively mixed with other materials, which is not conducive to improving the firmness of the connection, so it needs to be improved. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a renewable concrete and a production process thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A renewable concrete is prepared from the following raw materials: recycled aggregate, waste plastic fiber, cement, admixture components, and water. The recycled aggregate includes recycled coarse aggregate particles and recycled fine aggregate particles. The admixture components include a water reducer, a pumping agent, an early strength agent, and a defoamer. The weight ratio of the recycled aggregate, waste plastic fiber, cement, admixture components, and water is 80-100: 5-8: 70-90: 2-4: 20-30.

[0009] Compared with the prior art, the present application can effectively realize the recycling and use of waste building materials and corresponding plastics through the use of recycled aggregates and waste plastic fibers, which helps to better improve environmental protection performance, quickly resolve waste materials, and improve product strength and performance.

[0010] Preferably, the weight ratio of the water reducing agent, pumping agent, early strength agent and defoaming agent in the admixture components is 1-2:0.5-1:1.5-2:0.5-1.5.

[0011] Furthermore, the use of corresponding admixtures can help improve the performance of concrete and facilitate the use of concrete.

[0012] Preferably, the weight ratio of recycled coarse aggregate particles to recycled fine aggregate particles in the recycled aggregate is 1-1.2:1.5-2.

[0013] Furthermore, it can replace the aggregate in traditional concrete to effectively connect with cement and improve the strength and performance of the connection.

[0014] The present invention also proposes a production process of renewable concrete, which is applicable to the above-mentioned renewable concrete and comprises the following steps:

[0015] S1. Construction waste recycling, crushing and classification: Workers recycle construction waste and transport it to the crushing equipment for crushing. The crushed construction debris is screened by screening equipment. The waste with metal is selected and crushed again to remove the metal. The crushed concrete waste is transported to the vibrating screening equipment for vibration screening for classification. The larger ones are transported to the crushing equipment for crushing again. The ones that meet the specifications of recycled coarse aggregate particles are transported to the coarse aggregate storage equipment. The finer waste is collected and stored in a centralized manner.

[0016] S2. Crushing and grinding construction concrete waste and storing it as aggregate: The stored finer waste is transported to the sand making equipment for crushing, and the waste is prepared into sand particles that meet the specifications of recycled fine aggregate particles and stored;

[0017] S3. Screening and storage of other materials required for concrete preparation: The staff prepares other materials and fully tests them to ensure the quality of waste plastic fibers, cement, and admixture components. At the same time, they are stored according to their respective conditions and connected to corresponding conveying and metering equipment to achieve accurate feeding operations;

[0018] S4, stirring and mixing: conveying the respective materials into the stirring and mixing equipment through the corresponding conveying and metering equipment at the lower end of each storage device, so as to fully stir and mix the materials and ensure the mixing effect and quality between the materials;

[0019] S5. Concrete storage and transportation to the mixer truck for transfer: After mixing, the concrete is transported to the mixer truck and corresponding concrete conveying equipment through conveying equipment for transfer, which is convenient for concrete pouring operations.

[0020] Compared with the prior art, the present application can help those skilled in the art to fully understand the preparation and processing steps of waste concrete materials so as to operate them to form coarse aggregate and fine aggregate to effectively replace the sand and gravel in traditional concrete. At the same time, the connection between cement aggregates can be effectively achieved through waste plastic fibers, and the preparation of concrete can be effectively achieved. It also clearly shows how to use each device and how the staff should prepare recycled concrete.

[0021] Preferably, negative pressure dust suction equipment is installed on the conveying and metering equipment located at the lower end of the aggregate storage equipment, the waste plastic fiber storage equipment, the cement storage equipment and the admixture component storage equipment.

[0022] Furthermore, the dust can be quickly collected and processed by negative pressure vacuum equipment, effectively protecting the production environment and better protecting the staff.

[0023] Preferably, dust reduction equipment is installed on both the crushing equipment and the screening equipment.

[0024] Furthermore, dust reduction operations can be effectively achieved.

[0025] Preferably, the sand making equipment adopts an impact sand making machine.

[0026] Furthermore, concrete waste materials can be prepared into fine aggregate for use in concrete.

[0027] Preferably, the stirring and mixing equipment is a mechanical vertical shaft planetary mixer.

[0028] Furthermore, the materials can be fully mixed, which is helpful for preparing concrete.

[0029] The beneficial effects of the present invention are:

[0030] 1. Negative pressure vacuum equipment can quickly collect and process dust; dust reduction equipment can effectively achieve dust reduction operations; effectively protect the production and preparation environment and better protect the staff;

[0031] 2. Through the use of recycled aggregates and waste plastic fibers, the waste building materials and corresponding plastics can be effectively recycled and used, which helps to better improve environmental protection performance, quickly solve waste materials, and improve the strength and performance of products;

[0032] 3. After being added to the concrete mixture, the water reducer has a dispersing effect on the cement particles, which can improve its workability, reduce the unit water consumption, and improve the fluidity of the concrete mixture; the pumping agent can improve the pumping performance of the concrete, and also has the slow setting and plasticity retention properties, which can delay the initial setting time of the concrete and avoid construction difficulties caused by tight construction time; the early strength agent can significantly improve the early strength of the concrete, so that it can reach a higher strength level in a short time; the defoaming agent can effectively destroy the surface tension of the bubbles, so that they quickly aggregate and disappear, thereby reducing the number of bubbles and improving the density and strength of the concrete;

[0033] 4. Technical personnel in this field have a full understanding of the preparation and processing steps of waste concrete materials in order to operate them to form coarse aggregate and fine aggregate to effectively replace the sand and gravel in traditional concrete. At the same time, the connection between cement aggregates can be effectively achieved through waste plastic fibers, and the preparation of concrete can be effectively achieved. It also clearly shows how to use each equipment and how the staff should prepare recycled concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention provides a flow chart of a renewable concrete production process. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] A renewable concrete is prepared from the following raw materials: recycled aggregate, wherein the weight ratio of recycled coarse aggregate particles to recycled fine aggregate particles is 1-1.2:1.5-2; the recycled aggregate is prepared by using waste concrete, which can effectively realize the recycling of waste concrete, improve environmental protection performance, and reduce preparation costs; waste plastic fiber; cement; admixture components, wherein the weight ratio of water reducer, pumping agent, early strength agent and defoamer in the admixture components is 1-2:0.5-1:1.5-2:0.5-1.5; after the water reducer is added to the concrete mixture, it has a dispersing effect on cement particles, can improve its workability, reduce unit water consumption, and improve the fluidity of the concrete mixture; the pumping agent can improve the concrete Soil pumping performance, also has slow setting and plasticity retention performance, can delay the initial setting time of concrete, and avoid construction difficulties caused by tight construction time; early strength agent can significantly improve the early strength of concrete, so that it can reach a higher strength level in a short time; defoaming agent can effectively destroy the surface tension of bubbles, so that they quickly aggregate and disappear, thereby reducing the number of bubbles and improving the density and strength of concrete; water, recycled aggregate includes recycled coarse aggregate particles and recycled fine aggregate particles, admixture components include water reducer, pumping agent, early strength agent and defoaming agent; the weight ratio of recycled aggregate, waste plastic fiber, cement, admixture components and water is: 80-100: 5-8: 70-90: 2-4: 20-30.

[0037] Reference Figure 1 A production process of renewable concrete, applicable to the above-mentioned renewable concrete, comprises the following steps:

[0038] S1. Construction waste recycling, crushing and classification: Workers recycle construction waste and transport it to the crushing equipment for crushing. The crushed construction debris is screened by screening equipment. The waste with metal is selected and crushed again to remove the metal. The crushed concrete waste is transported to the vibrating screening equipment for vibration screening for classification. The larger ones are transported to the crushing equipment for crushing again. The ones that meet the specifications of recycled coarse aggregate particles are transported to the coarse aggregate storage equipment. The finer waste is collected and stored in a centralized manner.

[0039] S2. Crushing and grinding construction concrete waste and storing it as aggregate: The stored finer waste is transported to the sand making equipment for crushing, and the waste is prepared into sand particles that meet the specifications of recycled fine aggregate particles and stored; the sand making equipment adopts an impact sand making machine;

[0040] S3. Screening and storage of other materials required for concrete preparation: The staff prepares other materials and fully tests them to ensure the quality of waste plastic fibers, cement, and admixture components. At the same time, they are stored according to their respective conditions and connected to corresponding conveying and metering equipment to achieve accurate feeding operations;

[0041] S4, stirring and mixing: The materials are transported into the stirring and mixing equipment through the corresponding conveying and metering equipment at the lower end of each storage device to fully stir and mix the materials to ensure the mixing effect and quality between the materials; the stirring and mixing equipment adopts a mechanical vertical shaft planetary mixer;

[0042] S5. Concrete storage and transportation to the mixer truck for transfer: After mixing, the concrete is transported to the mixer truck and corresponding concrete conveying equipment through conveying equipment for transfer, which is convenient for concrete pouring operations.

[0043] In the present invention, negative pressure dust suction equipment is installed on the conveying and metering equipment at the lower end of the aggregate storage equipment, the waste plastic fiber storage equipment, the cement storage equipment and the admixture component storage equipment, and dust reduction equipment is installed on the crushing equipment and the screening equipment.

[0044] In the present invention, workers recycle construction waste, and transport the construction waste to a crushing device for crushing. The crushed construction debris is screened by a screening device, and waste with metal is selected and crushed again to remove the metal. The crushed concrete waste is transported to a vibration screening device for vibration screening for classification and processing, and larger waste is transported to a crushing device for crushing again, and waste with specifications that meet the requirements of recycled coarse aggregate particles is transported to a coarse aggregate storage device, and finer waste is collected and stored in a centralized manner.

[0045] The stored finer waste is transported to the sand making equipment for crushing, and the waste is prepared into sand particles that meet the specifications of recycled fine aggregate particles and stored; the staff prepares other materials and fully tests them to ensure the quality of waste plastic fibers, cement, and admixture components, and stores them according to their respective conditions, and connects the corresponding conveying and metering equipment to achieve accurate feeding operations;

[0046] The respective materials are transported into the stirring and mixing equipment through the corresponding conveying and metering equipment at the lower end of each storage device to fully stir and mix the materials to ensure the mixing effect and quality between the materials; after the stirring and mixing is completed, the materials are transported to the mixer truck and the corresponding concrete conveying equipment through the conveying equipment for transfer, which is convenient for concrete pouring operations.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A renewable concrete, characterized in that: The invention is prepared from the following raw materials: recycled aggregate, waste plastic fiber, cement, admixture components and water. The recycled aggregate includes recycled coarse aggregate particles and recycled fine aggregate particles. The admixture components include water reducing agent, pumping agent, early strength agent and defoaming agent. The weight ratio of the recycled aggregate, waste plastic fiber, cement, admixture components and water is 80-100: 5-8: 70-90: 2-4: 20-30.

2. The renewable concrete according to claim 1, characterized in that: The weight ratio of the water reducing agent, the pumping agent, the early strength agent and the defoaming agent in the admixture components is 1-2:0.5-1:1.5-2:0.5-1.

5.

3. The renewable concrete according to claim 1, characterized in that: The weight ratio of recycled coarse aggregate particles to recycled fine aggregate particles in the recycled aggregate is 1-1.2:1.5-2.

4. A production process of renewable concrete, applicable to the renewable concrete of claims 1-3 above, characterized in that: The following steps are involved: S1. Construction waste recycling, crushing and classification: Workers recycle construction waste and transport it to the crushing equipment for crushing. The crushed construction debris is screened by screening equipment. The waste with metal is selected and crushed again to remove the metal. The crushed concrete waste is transported to the vibrating screening equipment for vibration screening for classification. The larger ones are transported to the crushing equipment for crushing again. The ones that meet the specifications of recycled coarse aggregate particles are transported to the coarse aggregate storage equipment. The finer waste is collected and stored in a centralized manner. S2. Crushing and grinding construction concrete waste and storing it as aggregate: The stored finer waste is transported to the sand making equipment for crushing, and the waste is prepared into sand particles that meet the specifications of recycled fine aggregate particles and stored; S3. Screening and storage of other materials required for concrete preparation: The staff prepares other materials and fully tests them to ensure the quality of waste plastic fibers, cement, and admixture components. At the same time, they are stored according to their respective conditions and connected to corresponding conveying and metering equipment to achieve accurate feeding operations; S4, stirring and mixing: conveying the respective materials into the stirring and mixing equipment through the corresponding conveying and metering equipment at the lower end of each storage device, so as to fully stir and mix the materials and ensure the mixing effect and quality between the materials; S5. Concrete storage and transportation to the mixer truck for transfer: After mixing, the concrete is transported to the mixer truck and corresponding concrete conveying equipment through conveying equipment for transfer, which is convenient for concrete pouring operations.

5. The renewable concrete and production process thereof according to claim 4, characterized in that: Negative pressure dust collection equipment is installed on the conveying and metering equipment located at the lower end of the aggregate storage equipment, the waste plastic fiber storage equipment, the cement storage equipment and the admixture component storage equipment.

6. The renewable concrete and production process thereof according to claim 4, characterized in that: Dust reduction equipment is installed on the crushing equipment and the screening equipment.

7. The renewable concrete and production process thereof according to claim 4, characterized in that: The sand making equipment adopts an impact sand making machine.

8. The renewable concrete and production process thereof according to claim 4, characterized in that: The stirring and mixing equipment adopts a mechanical vertical shaft planetary mixer.

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