Waste concrete refers to cement concrete waste generated from the demolition of concrete structures. After crushing, washing, and grading, the waste concrete is mixed in a specific ratio to obtain recycled aggregate. The core of the production process for recycling waste concrete blocks is to transform it into recycled aggregate through crushing, screening, and washing steps, which can then be used to produce concrete, mortar, or building materials. The following is the specific process and key equipment:

 

I. Production Process Flow

 

1. Raw Material Preparation

 

The main sources are demolished concrete pavements and construction waste, which need to be sorted to remove impurities such as reinforcing bars and wood.

 

2. Crushing Stage

 

Coarse Crushing: Large pieces of concrete are crushed into smaller pieces using a jaw crusher. The jaw crusher, with its high compressive strength and durability, is the core equipment in the coarse crushing stage, significantly improving processing efficiency.

 

Medium and Fine Crushing: Cone crushers or impact crushers are used to further crush the concrete into gravel or coarse sand (output particle size 3-40mm).

 

Sand Making and Shaping: To improve the quality and appearance of recycled aggregates, a vertical shaft impact crusher (sand making machine) is installed. This further crushes and shapes the coarse aggregates, making the particles more rounded and the gradation more reasonable. The content of needle-like and flaky particles can be reduced to below 5%, fully meeting the standards for construction sand.

 

 

3. Screening Stage

 

A vibrating screen is used to classify the aggregates by particle size, obtaining recycled coarse aggregates (5-40mm) and fine aggregates (0.15-2.5mm).

 

4. Washing Stage (Optional)

 

An optional washing stage uses a sand washing machine to remove mud and stone powder, improving the purity of the aggregates.

 

II. Equipment Selection

 

Depending on the processing capacity and requirements, fixed or mobile aggregate production lines can be selected:

 

1. Fixed Production Line: Suitable for large-scale, stable processing, such as a combination of jaw crusher + cone crusher + sand making machine.

 

2. Mobile Production Line: Two types of mobile crushing stations are available: wheeled and tracked. One machine can support a complete crushing production line, offering flexible relocation and suitable for dispersed or temporary sites.

 

 

III. Application Areas

 

Recycled Aggregate Concrete: Used for structural components in building engineering, road base courses, etc.

 

Building Materials: Such as permeable bricks, blocks, wall panels, etc.

 

Highway Pavement Base Course: Used after adding solidification materials to recycled aggregate.

 

IV. Precautions

 

Equipment Maintenance: Regularly inspect crushers, screening machines, and other equipment to ensure normal operation.

 

Environmental Protection Measures: Implement measures such as noise reduction, dust removal, and wastewater treatment to reduce environmental pollution.

 

Through the above processes, waste concrete blocks can be efficiently converted into recycled resources, achieving a win-win situation for both economic and environmental benefits.

 

Luoyang Dahua Heavy Industry Science and Technology Co., Ltd. is a direct-sales manufacturer integrating R&D, production, sales, and service. We provide various types of mining crushing equipment. High quality is more reliable, and we optimize the combination of various models of equipment, tailor-made supporting equipment and construction plans to meet different process requirements. We serve you from equipment selection, site inspection, equipment manufacturing, installation, commissioning, and delivery. Welcome to visit Luoyang Dahua Heavy Machinery for on-site inspection. We will provide you with professional support! is a direct-sales manufacturer integrating R&D, production, sales, and service. We provide various types of mining crushing equipment. High quality is more reliable, and we optimize the combination of various models of equipment, tailor-made supporting equipment and construction plans to meet different process requirements. We serve you from equipment selection, site inspection, equipment manufacturing, installation, commissioning, and delivery. Welcome to visit Luoyang Dahua Heavy Machinery for on-site inspection. We will provide you with professional support!