Simplified Guide to Construction Waste Brick Making Equipment and Processes

Simplified Guide to Construction Waste Brick Making Equipment and Processes

I. Three Steps of Waste Processing

* Crushing: Crush concrete blocks and waste bricks into pieces smaller than 50mm using a crusher.

* Impurity Removal: Remove reinforcing bars using magnetic separation and remove impurities by screening to obtain clean aggregate.

* Grading: Separate recycled aggregate into coarse and fine aggregates according to particle size.

II. Core Brick Making Equipment

* Vibration Molding Machine: Lower investment, suitable for making load-bearing bricks and blocks.

* Hydraulic Brick Press: High pressure, suitable for making high-strength paving bricks and plaza bricks.

Basic Process: Feeding → Metering → Mixing → Molding → Stacking → Curing.

III. Raw Material Proportioning Reference

* Basic Formula (by weight):

* Recycled Aggregate: 70%–85%

* Cement: 10%–15%

* Fly Ash/Slag: 5%–10%

* Water: Appropriate amount (ideally, it should feel like a clump that doesn't crumble when squeezed)

* Adjustment Direction:

For non-load-bearing bricks: Use more recycled materials (up to 85%).

For load-bearing bricks: Use the upper limit of cement dosage and select high-quality aggregates.

IV. Key Production Controls

Moisture Content: Control the total moisture content of the material at 8%–12%.

Molding Pressure: Generally maintained at 15–20 MPa.

Steam Curing: Temperature 60–80℃, humidity >90%, curing for 1–2 days for demolding, 7 days to reach standard.

V. Products and Advantages

Product Types: Standard bricks, perforated bricks, paving bricks, permeable bricks, etc.

Environmental Advantages: Reduces construction waste accumulation and sand and gravel mining.

Energy-saving without firing, enjoying national tax incentives.

Economic Advantages: Low raw material costs, competitive products in the market.

VI. Common Problems and Solutions

Insufficient Strength → Increase the cement ratio or add a small amount of reinforcing agent.

High Water Absorption → Adjust the aggregate gradation (use more fine materials), increase molding pressure.

Difficulty Molding → Check if the moisture content deviates significantly, or if the aggregate particle size is too coarse.

VII. Startup Recommendations

First, conduct trial runs: Use local waste materials for small-scale testing to verify feasibility.

Choose the right equipment: Select the appropriate machine model based on target output and product; avoid overkill.

Emphasis on curing: Proper steam curing is crucial for ensuring strength and project timeline.

Find sales channels: Connect with building materials markets and municipal engineering projects in advance.

Core Summary

Maintaining quality in brick making from construction waste hinges on proper raw material processing, accurate proportioning, and controlled curing. Equipment selection should match production capacity; the process is mature, and meticulous management is key. This approach is both environmentally friendly and profitable, making it suitable for regions with a stable source of waste materials.