Construction Waste Block Making Production Line

1. Construction muck or crushed and screened construction waste is weighed, followed by the addition of matched curing agents.The bonding force between materials and aggregates is enhanced, which improves the elastic modulus and flexibility of finished products.
2. Grading at the batching stationAggregates serve as the skeleton in non-fired bricks, forming the main framework of the material and bearing external loads. The compactness of aggregate stacking, namely aggregate grading, largely determines the mechanical properties, durability and economic performance of non-fired bricks.
3. Materials are delivered via belt conveyor to the planetary mixer for mixingForced planetary mixers are adopted to achieve uniform blending of raw materials.

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5. Mixed materials are conveyed to the mixing wheel roller mill for roller millingThe roller milling process activates raw materials, mixes components, crushes coarse particles and plasticizes mixtures. It increases the compactness and optimizes the performance of mixtures to upgrade product quality.

7. Equipment Name	Equipment Pictures
   Crushing Production Line The construction waste production line consists of vibrating feeder,  jaw crusher, double-tooth roller crusher, double roller crusher,  belt conveyors, electric control system and other equipment. It features high automation, good adaptability to steel bars  and high-moisture materials, and large output capacity. Except for regular startup, shutdown and daily maintenance  of the equipment, the construction waste production line  basically requires no manual operation.
   Batching and Mixing System Accurate Proportioning & Stable Finished Products Equipped  with high-precision weighing and real-time moisture correction functions,  the system eliminates the pain points of large fluctuations in gradation  and moisture content of construction waste aggregates between batches.  It ensures consistent compressive strength, water absorption rate  and drying shrinkage value of bricks in every batch, complying with  municipal engineering inspection standards.
   Block Forming System The block forming system serves as the core forming equipment  of the entire brick production line. It receives activated mixed  materials conveyed from the batching and mixing system.  Adopting high-pressure static pressing forming technology,  it once compresses the mixture of recycled aggregates,  cement and curing agent into finished products of standard specifications,  including non-fired blocks, paving bricks, water-permeable bricks,  curb stones and so on.The whole system features high automation,  adjustable pressing force and dense forming effect.  It is well compatible with recycled construction waste raw materials.  The formed green bricks boast high strength, regular dimensions  and low drying shrinkage rate. After forming, the green bricks  can be directly transferred for curing, greatly improving the finished  product qualification rate and production efficiency.
   Automatic Curing System Two-stage layered curing process: the green bricks are first kept in  airtight static curing to lock moisture and boost early strength,  followed by natural air-drying to control moisture content,  which thoroughly solves the problem of easy drying shrinkage  and cracking of recycled aggregates. Equipped with fully automatic shuttle mother-son trolleys  and airtight curing kilns, the whole process requires no manual handling,  drastically reducing the breakage rate of green bricks.
   Automatic Palletizing System This intelligent brick stacking equipment adopts a palletizing  layout design with reserved gaps. It is a dedicated brick stacking system  developed to replace manual stacking of finished bricks on production lines.  It solves the problems of high labor intensity and low production efficiency,  and realizes mechanized loading and unloading of finished bricks for delivery. The system can be installed independently near the finished brick  curing yard to stack cured products on site.  It can also be connected in series with the block forming production line  and automatic curing system to realize online palletizing operation.

8. Materials are transported by conveyor to the block forming machine for compression moldingFor heavy aggregate high-strength non-fired bricks, the molding pressure shall be controlled within 18–20 MPa. For lightweight aggregate low-strength non-fired bricks, the molding pressure should be set at 10–15 MPa to avoid excessive compression of lightweight aggregates and loss of their lightweight characteristics.
10. Molded bricks are transported by shuttle trolleys to track curing kilns for 7 days of static curing

Static Curing Explanation

Freshly pressed non-fired bricks lack sufficient strength for direct stacking and thus require static curing.

Brick and pallet separation, packing, and transportation to the storage yard via forklifts for natural curingWater is sprayed on brick stacks three times daily (morning, noon and evening), with natural air-drying applied for the rest of the day. Relevant tests show that the moisture content of bricks drops below 2–4% by the 28th curing day. At this stage, the relative moisture content is low, resulting in minimal drying shrinkage. The drying curing process does not hinder strength gain of bricks. The maximum water absorption rate of finished bricks is ≤10%, and the relative moisture content can be easily maintained below 40%.