In the field of resource utilization of construction waste and production of new environmentally friendly building materials, the construction waste brick making machine is a specialized mechanical equipment mainly used to process the waste concrete, red bricks, mortar and other construction waste generated during demolition and construction processes. It is converted into various types of recycled bricks through a series of processing procedures to achieve the recycling of construction waste. It has strong adaptability and stable production operation, and is widely used in construction waste treatment plants, building materials production enterprises, large-scale demolition sites and other scenarios. It is an important equipment for promoting green environmental protection and circular economy development. Many people have a vague understanding of the construction waste brick making machine, and are not clear about its working principle, technical parameters, and application specifications. A deep understanding of this type of equipment can not only clarify its core role in construction waste treatment, but also provide scientific references for related production activities.

        From a definition perspective, a construction waste brick making machine is a specialized mechanical equipment that uses construction waste as the main raw material, combined with appropriate amounts of cementitious materials, additives, and water, to produce various types of brick products through sorting, crushing, screening, batching, mixing, forming, and curing processes. Its core function is to transform construction waste that is difficult to dispose of and prone to environmental pollution into building materials with practical value. This not only reduces the land resources occupied by the landfill and stacking of construction waste, lowers the risk of environmental pollution, but also saves natural building materials such as clay and sand, which meets the requirements of the national "waste free city" construction and the development of green building materials. Compared with traditional brick making equipment, the core feature of construction waste brick making machine is reflected in the adaptability of raw materials. It can handle various types of construction waste, and the production process mostly adopts non burning or steam curing technology, with relatively low energy consumption and pollutant emissions, which is in line with the trend of environmental protection development.

        The overall structure of the construction waste brick making machine is composed of multiple functional systems, which work together to ensure the orderly progress of the production process. There are slight differences in the structure of different types of equipment, but the core components are basically the same. It mainly includes raw material processing system, ingredient mixing system, molding system, conveying system, and maintenance system. Some intelligent models are also equipped with a central control system. The raw material processing system is a characteristic component of the construction waste brick making machine, responsible for sorting, crushing, and screening construction waste, removing impurities such as steel bars, plastics, and wooden blocks, and then crushing the construction waste into aggregates that meet production requirements. Commonly used crushing equipment includes jaw crushers and hammer crushers, with jaw crushers used for initial crushing and hammer crushers used for secondary crushing. After screening, different particle sizes of recycled aggregates such as 5-10mm and 0.16-5mm can be obtained; The batching and mixing system mixes recycled aggregates, cementitious materials, additives, and water in proportion through standardized measurement. The commonly used forced mixer has a mixing shaft speed of 30r/min to 40r/min and a mixing time controlled between 4min to 6min to ensure the uniformity of the mixture; The forming system is the core component, which often uses high-pressure vibration+static pressure forming or hydraulic static pressure forming processes to press the mixture into bricks. The common fully automatic hydraulic brick press has a static pressure of about 500t and a forming cycle of 15-20 seconds. Some models can form 6 blocks at once; The conveying system is responsible for transporting raw materials, recycled aggregates, and bricks between various processes, while the curing system enhances the strength of bricks and ensures the quality of finished products through steam curing or natural curing.

        The technical parameters and production indicators of the construction waste brick making machine have clear industry norms and actual production standards. Relevant data can be verified through industry information, government project publicity, and production practice queries. In terms of production efficiency, there are significant differences in the output of different models of equipment. Small models can produce around 73 million standard bricks per year, while large intelligent production lines can process over 50000 tons of construction waste per year. The hourly production of standard bricks can reach thousands, and some large production lines can produce 9600-14000 standard bricks per hour. In terms of molding specifications, various types of bricks can be produced by replacing modular molds. The standard brick specifications are 240mm × 115mm × 53mm, and the common specifications for permeable bricks include 400 × 200 × 60mm, 300 × 150 × 60mm, etc. The specifications for hollow blocks can be adjusted according to demand, and the number of bricks that can be molded into each pallet varies depending on the specifications. For example, standard bricks can be molded into 56-72 pieces per board. In addition, the motor power of the construction waste brick making machine varies depending on the model, usually between 11-55kW. The installed capacity of the production line can reach about 540kW, and the utilization rate of construction waste can reach over 90%.

        The raw material ratio is the key to the production of construction waste bricks. The relevant ratios must strictly follow technical specifications to ensure the strength and durability of the finished products. There are differences in the ratio of different types of recycled bricks. The following are the industry's general ratios and raw material quality requirements, which can be verified through local government project data and industry practice. Taking recycled unburned bricks as an example, the raw material ratio (weight percentage) requirements are: recycled aggregate (crushed construction waste) accounts for 78% -80%, cementitious material (cement) accounts for 10% -12%, water accounts for 10% -12%, and soil stabilizer accounts for 0.02% -0.05%; In the proportion of steam pressed recycled bricks, the proportion of recycled aggregates can reach about 89%, the proportion of lime is 11%, and the amount of water added is 6% -9%. At the same time, the quality of raw materials must meet the standards. After crushing construction waste, harmless treatment must be carried out to remove impurities. The moisture content of recycled aggregates should be controlled at around 8%, the dry bulk density should not be less than 750kg/m ³, and the loss on ignition should not exceed 20%; Cement must comply with relevant national standards, gypsum must meet the third level requirements of GB/T5483, and the residue of 0.088mm square hole sieve should not exceed 15%. In the process of raw material measurement, the allowable error of silicon containing raw materials such as recycled aggregates shall not exceed ± 3%, calcium containing raw materials such as cement and lime shall be ± 2%, and the measurement error of water shall be ± 2%.

        The production process of the construction waste brick making machine needs to follow the corresponding technical regulations, and there are differences in the operating requirements of different processes. Currently, the industry is mainly divided into non burning process and steam pressing process, among which the non burning process is widely used, mainly divided into construction waste sorting, crushing, screening, batching, mixing, forming, curing, finished product processing and other processes. Specifically, the sorting process uses manual or mechanical sorting to remove impurities such as steel bars, plastics, and wooden blocks from construction waste; In the crushing and screening process, construction waste is initially crushed by a jaw crusher and secondarily crushed by a hammer crusher. Different particle sizes of recycled aggregates are separated by a vibrating screen. Aggregates that exceed the specifications are returned to the crusher for further crushing; The mixing or blending process adopts a wheel roller mixer or a forced mixer, and the mixing time is controlled between 4 minutes and 6 minutes to ensure that the mixture is compacted evenly and the ratio is consistent; After molding, the curing method is selected according to different processes. The steam curing process is divided into four stages: static stop outside the kettle, heating, constant temperature, and cooling. The static stop outside the kettle lasts for 3-4 hours, the temperature is maintained at 50 ℃~60 ℃, and the constant temperature stage is controlled at 175 ℃± 5 ℃, with a pressure of 0.8 MPa and a constant temperature duration of 6-7 hours; The non burning process is achieved through natural curing or sun curing. The sun curing cycle is 24-48 hours, during which a small amount of water is sprayed every 12 hours. After 28 days of natural curing, the brick body is hardened and formed. The complete production process from construction waste to recycled bricks takes about 5 minutes per brick.

        The application scenarios of construction waste brick making machines are closely related to the amount of construction waste generated and the demand for building materials, mainly concentrated in the fields of comprehensive utilization of construction waste and production of new building materials, which is in line with relevant national policy guidance. At large-scale demolition sites and construction waste treatment plants, the construction waste brick making machine can directly process the waste concrete, red bricks and other construction waste generated on site, achieving "local material and on-site treatment", reducing the transportation cost of construction waste and environmental pollution; In building materials production enterprises, construction waste brick making machines can use various types of construction waste to produce various building materials such as standard bricks, permeable bricks, slope protection bricks, hollow blocks, etc., which are suitable for different scenarios such as residential buildings, industrial plants, municipal engineering, and garden construction. Recycled bricks can be used in urban roads, parking lots, squares, sidewalks and other places, and some recycled bricks that meet strength requirements can be used for non main load-bearing structures. In addition, the performance of the recycled bricks produced by the construction waste brick making machine meets relevant standards. The compressive strength of the finished products can reach over 15MPa, and some products can reach MU15 or above, which can meet the needs of different building scenarios. At the same time, it has durability and ecology, good frost resistance, and is not prone to bulging at minus 10 degrees Celsius. According to relevant policy requirements, in government funded construction projects, the proportion of recycled aggregate used in C25 and below strength grade recycled aggregate concrete shall not be less than 25%.

        The use, maintenance, and industry standards of construction waste brick making machines are crucial for the service life and production safety of the equipment. At present, China has introduced relevant policies and regulations to encourage the use of construction waste to produce new wall materials. Relevant products are required to undergo harmless treatment and testing, and meet national environmental protection and construction material quality standards. Some places have also issued specific technical regulations, making clear provisions on the process flow, equipment requirements, quality inspection, etc. of building waste brick making. In terms of equipment maintenance, it is necessary to regularly inspect various system components, promptly clean up residual raw materials and impurities inside the equipment, check the wear of molds and replace them in a timely manner; The crushing equipment needs to be regularly inspected for vulnerable parts such as hammers and liners, and the hydraulic system needs to be regularly checked for oil quality and quantity, and replaced with hydraulic oil that meets the standards; The electrical system needs to regularly inspect the wiring, take waterproof and dustproof measures to ensure safe operation; The remote monitoring and fault diagnosis system of intelligent models needs to be regularly debugged to ensure the normal operation of the equipment. During the transportation and storage of equipment, it should be handled with care to avoid collision damage. Modular molds should be properly stored to prevent deformation.

        As an important equipment for promoting the resource utilization of construction waste, the construction waste brick making machine plays an important role in environmental protection and building materials. It not only realizes the "turning waste into treasure" of construction waste, reduces resource waste and environmental pollution, but also saves farmland and reduces carbon dioxide emissions by processing a certain amount of construction waste. At the same time, it promotes the development of the green building materials industry, which is in line with the national circular economy development strategy. Understanding the working principle, technical parameters, and application specifications of the construction waste brick making machine, strictly following relevant standards for production and operation, can not only improve production and operation efficiency and product quality, but also fully leverage its environmental value and economic benefits, and help achieve the coordinated promotion of ecological protection and industrial development.