Dedicated Recycled Aggregate Mixing System: Key Equipment for Construction Waste Resource Utilization

Dedicated Recycled Aggregate Mixing System: Key Equipment for Construction Waste Resource Utilization

Using recycled aggregate, derived from crushed construction waste, in concrete production is a crucial step in achieving resource recycling. However, recycled aggregates are characterized by high water absorption, complex composition, and uneven texture, making it difficult to guarantee concrete quality using ordinary mixing systems. Therefore, it is necessary to specifically optimize the core mixing equipment to create a dedicated recycled aggregate mixing system.

The core optimization of this system lies in the adaptive modification of the mixing host and batching process. Traditional concrete mixers are primarily designed for homogeneous natural aggregates. Addressing the issues of rough surfaces, high porosity, and easy water absorption of recycled aggregates, dedicated mixers typically employ stronger mixing forces and more rational blade designs to ensure that the cement paste fully coats the recycled aggregates, achieving uniform mixing. Simultaneously, the system is equipped with a high-precision moisture monitoring and compensation device. Since recycled aggregates absorb some mixing water, the system can monitor the actual wet and dry state of the mixture in real time and automatically replenish the water absorbed by the aggregates, thereby precisely controlling the final concrete's water content and consistency.

Precise batching and pretreatment are prerequisites for ensuring quality. The specialized system implements precise control during the batching stage. First, the recycled aggregate is pre-wetted, allowing it to absorb some moisture beforehand, reducing competition for water during the actual mixing process and resulting in a more stable water-cement ratio. Second, the batching scales require higher precision and can automatically adjust the weighing of sand, gravel, and water based on the actual moisture content of the recycled aggregate, achieving dynamic proportioning compensation.

This optimized specialized mixing system effectively overcomes the inherent defects of recycled aggregates, producing recycled concrete with good workability and meeting strength standards. This is not only a key technological tool for promoting the "turning waste into treasure" of construction waste, but also provides a solid guarantee for reducing dependence on natural sand and gravel and developing a green building materials industry.