Production method for manufacturing environment-friendly brick by using construction waste

Abstract

The invention discloses a production method for manufacturing an environment-friendly brick by using construction waste, which comprises the following steps: S1, crushing the construction waste, and converting the construction waste into particles; s2, the construction waste particles are subjected to screening and grading treatment so as to facilitate follow-up mixing and forming; s3, the crushed and screened construction waste particles are evenly mixed with mineral substances, additives and fly ash, the weight of the construction waste particles accounts for 60-70%, and the weight of the fly ash accounts for 10%; and S4, the stirred and mixed materials are put into a brick making machine to be subjected to compression molding, and the molding strength is 11%-13%. In the production process of the construction waste water permeable brick, a traditional brick sintering process is avoided, energy is saved, and environmental pollution is reduced. The cyclic utilization of the construction waste is realized, the problems of transportation and space storage of the construction waste are effectively relieved, and the environmental protection requirements of nearly zero pollution and zero emission are met.

Description

Technical Field

[0001] The invention relates to the technical field of environmentally friendly brick manufacturing, in particular to a production method for manufacturing environmentally friendly bricks by utilizing construction waste. Background Art

[0002] With the accelerated advancement of urbanization, the construction industry has flourished, but at the same time it has brought about a large amount of construction waste. The traditional way of dealing with construction waste not only occupies a large amount of land resources, but also causes serious pollution to the environment. How to use construction waste to make environmentally friendly bricks and realize resource recycling has become a problem that needs to be solved urgently. In view of this, we have developed a production method for making environmentally friendly bricks using construction waste. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a production method for manufacturing environmentally friendly bricks using construction waste, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a production method for manufacturing environmentally friendly bricks using construction waste, comprising the following steps:

[0005] S1, crushing the construction waste and converting it into particles;

[0006] S2, screening and grading the construction waste particles for subsequent mixing and molding;

[0007] S3, uniformly mixing the crushed and screened construction waste particles with minerals, additives and fly ash, wherein the weight of the construction waste particles accounts for 60-70% and the weight of the fly ash accounts for 10%;

[0008] S4, putting the mixed materials into a brick making machine for pressing and molding, with a molding strength of 11% to 13%;

[0009] S5, curing and curing the formed environmentally friendly bricks to ensure their strength and durability;

[0010] S6. The recycled bricks are quality inspected. Only those that meet the requirements can be sold and used. Unqualified bricks will be re-crushed and sorted before being reused.

[0011] As a preferred technical solution of the present invention, the crushing process in step S1 includes but is not limited to disc weight centrifugal separation, brick-concrete separator, and robot sorting.

[0012] As a preferred technical solution of the present invention, in step S2, the material ratio after screening and grading of construction waste is as follows: the material with a particle size of 5mm to 10mm does not exceed 3%, the coarse particle material with a particle size of 3mm to 5mm does not exceed 30%, the fine particle material with a particle size of 0.5mm to 3mm does not exceed 30%, and the powder material with a particle size less than 0.5mm does not exceed 30%.

[0013] As a preferred technical solution of the present invention, in step S3, the minerals include but are not limited to lime, cement, and plaster of Paris.

[0014] As a preferred technical solution of the present invention, in step S3, the additives include but are not limited to polypropylene fibers, plasticizers, and reinforcing agents.

[0015] As a preferred technical solution of the present invention, in step S4, a new process of pressure-vibration composite and dual-effect integrated product molding and a multi-axis servo vibration system are used to press and mold the material.

[0016] As a preferred technical solution of the present invention, in step S5, the curing method is accelerated shade drying, drying treatment and regular water sweeping.

[0017] As a preferred technical solution of the present invention, in step S6, the performance indicators of the brick body that passes the quality inspection are as follows: compressive strength greater than 6MPa, tensile strength greater than 0.8MPa, water absorption rate of the brick body less than 10%, and thermal conductivity of the brick body less than 0.5W / (m·K).

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. After crushing and screening, construction waste can be prepared into raw materials for environmentally friendly bricks, realizing resource utilization of construction waste and reducing dependence on natural resources;

[0020] 2. By making environmentally friendly bricks from construction waste, construction waste can be transformed into useful building materials, achieving the reduction of construction waste, effectively reducing the pollution of the environment by construction waste, reducing land occupation and land pollution, and alleviating environmental pressure;

[0021] 3. Compared with traditional building materials, the production process of bricks made from construction waste consumes less energy and has less emissions, which helps reduce the emission of greenhouse gases such as carbon dioxide;

[0022] 4. Making bricks from construction waste can absorb a large amount of construction waste, realize resource recycling, and improve resource utilization efficiency;

[0023] 5. Making bricks from construction waste can save a lot of natural resources, such as clay, sand and gravel, reduce energy consumption, and is extremely environmentally friendly. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention provides a technical solution: a production method for manufacturing environmentally friendly bricks using construction waste, the steps are as follows:

[0026] S1, crushing the construction waste and converting it into particles within a certain size range;

[0027] The construction waste is sent to the crusher for jaw crushing and fine crushing. The qualified particles are selected through roller screening to enter the subsequent process, and the unqualified particles are returned to the crushing process through the conveyor belt and crushed again until the particle size is qualified.

[0028] The application of innovative crushing technologies such as disc weight centrifugal separation, brick-concrete separator, and robot sorting has achieved high separation accuracy of red and white particles, providing high-quality raw materials for subsequent building materials production;

[0029] S2, classify the construction waste particles for subsequent mixing and molding; the selection of screening equipment should be based on the size and shape of the particles to ensure the accuracy and controllability of the particles.

[0030] The material proportion after screening and grading of construction waste is as follows: the material with a particle size of 5mm to 10mm does not exceed 3%, the coarse particle material with a particle size of 3mm to 5mm does not exceed 30%, the fine particle material with a particle size of 0.5mm to 3mm does not exceed 30%, and the powder material with a particle size less than 0.5mm does not exceed 30%. This particle size distribution significantly optimizes the performance of recycled bricks, making its average compressive strength reach 41.5 MPa;

[0031] Through the innovative technology of Yinma Process Equipment, the recycled red and white particles are optimally graded to maximize the utilization of resources.

[0032] White particles are mainly used for road bricks, imitation stone bricks and other products with higher molding strength, while red particles are mainly used for wall and antique products with lower molding strength. This graded utilization method improves resource utilization and product diversity.

[0033] S3, the crushed and screened construction waste particles are evenly mixed with other materials to meet the performance requirements of environmentally friendly bricks. The proportion of particles and the mixing uniformity are strictly controlled during the mixing process to ensure the quality and strength of the brick body.

[0034] Other materials include minerals such as lime, cement, and plaster of Paris, as well as additives such as polypropylene fiber, plasticizers, and reinforcing agents. In order to improve the later strength of the product, a certain amount of fly ash is usually added. The silica content in fly ash is about 50%, and its content is generally controlled at around 10%.

[0035] S4, put the mixed materials into the brick making machine for pressing and molding. In this process, the size of molding moisture and molding pressure are very important, and the molding strength is usually controlled between 11% and 13%;

[0036] During the molding process, the molding pressure, speed and other parameters are adjusted according to the characteristics of the particles and the requirements of the brick body to obtain the ideal brick shape and size.

[0037] The new pressure-vibration composite and dual-effect integrated product molding process and multi-axis servo vibration system have been adopted to successfully solve industry problems such as low incorporation of construction solid waste, difficulty in handling fine powder, poor product density, low strength and easy quality change.

[0038] When the amount of construction waste added reaches 60-70%, the average compressive strength can reach 41.5 MPa, which greatly improves the resource utilization rate of construction waste and the quality of recycled bricks.

[0039] S5, the formed environmentally friendly bricks need to be cured and solidified to ensure their strength and durability. This usually includes steps such as accelerated shade drying, drying treatment and regular water sweeping and curing.

[0040] S6, conduct quality inspections on recycled bricks, including strength, durability and water resistance, to ensure that they meet the requirements for use. Only recycled bricks that meet the regulations can be sold and used. Unqualified bricks can be reused after re-crushing and sorting to improve the utilization rate of raw materials.

[0041] The compressive strength of the brick is generally greater than 6MPa, and the tensile strength is generally greater than 0.8MPa, to meet the needs of building use. The water absorption rate of the brick is generally less than 10%, ensuring that it has good waterproof performance during use. The thermal conductivity of the brick is generally less than 0.5W / (m·K), which is beneficial to energy saving and environmental protection.

[0042] The production process of construction waste permeable bricks avoids the sintering process of traditional bricks, saving energy and reducing environmental pollution.

[0043] It realizes the recycling of construction waste, effectively alleviates the transportation and spatial storage problems of construction waste, and meets the environmental protection requirements of near zero pollution and zero emissions.

[0044] Failed bricks can be reused by re-crushing and sorting, thus improving the utilization rate of raw materials.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing environmentally friendly bricks using construction waste, characterized in that: The following steps are involved: S1, crushing the construction waste and converting it into particles; S2, screening and grading the construction waste particles for subsequent mixing and molding; S3, uniformly mixing the crushed and screened construction waste particles with minerals, additives and fly ash, wherein the weight of the construction waste particles accounts for 60-70% and the weight of the fly ash accounts for 10%; S4, putting the mixed materials into a brick making machine for pressing and molding, with a molding strength of 11% to 13%; S5, curing and curing the formed environmentally friendly bricks to ensure their strength and durability; S6. The recycled bricks are quality inspected. Only those that meet the requirements can be sold and used. Unqualified bricks will be re-crushed and sorted before being reused.

2. The method for producing environmentally friendly bricks using construction waste according to claim 1, characterized in that: The crushing process in step S1 includes but is not limited to disc weight centrifugal separation, brick-concrete separator, and robot sorting.

3. The method for producing environmentally friendly bricks using construction waste according to claim 1, characterized in that: In step S2, the material proportions after screening and grading of construction waste are as follows: materials with a particle size of 5mm to 10mm do not exceed 3%, coarse particles with a particle size of 3mm to 5mm do not exceed 30%, fine particles with a particle size of 0.5mm to 3mm do not exceed 30%, and powder materials with a particle size less than 0.5mm do not exceed 30%.

4. The method for producing environmentally friendly bricks using construction waste according to claim 1, characterized in that: In step S3, the minerals include but are not limited to lime, cement, and plaster of Paris.

5. The method for producing environmentally friendly bricks using construction waste according to claim 1, characterized in that: In step S3, the additives include but are not limited to polypropylene fibers, plasticizers, and reinforcing agents.

6. The method for producing environmentally friendly bricks using construction waste according to claim 1, characterized in that: In step S4, the material is pressed and formed by adopting a new process of pressure-vibration composite and dual-effect integrated product forming and a multi-axis servo vibration system.

7. The method for producing environmentally friendly bricks using construction waste according to claim 1, characterized in that: In step S5, the curing method is accelerated drying in the shade, drying treatment and regular water sweeping.

8. The method for producing environmentally friendly bricks using construction waste according to claim 1, characterized in that: In step S6, the performance indicators of the bricks that pass the quality inspection are as follows: compressive strength greater than 6 MPa, tensile strength greater than 0.8 MPa, water absorption rate of the bricks less than 10%, and thermal conductivity of the bricks less than 0.5 W / (m·K).