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Published on: February 21, 2017
Artificial aggregate made from waste stone sludge and waste silt
Fang-Chih Chang1, Ming-Yu Lee, Shang-Lien Lo
1The Instrument Center, National Cheng Kung University, No.1, University Road, Tainan City 70101, Taiwan, ROC. d90541003@ntu.edu.tw
Journal of Environmental Management
|July 13, 2010
Summary
Recycling stone sludge and silt waste creates artificial aggregate. This eco-friendly method reduces waste and provides a sustainable alternative to traditional construction materials.
Area of Science:
- Materials Science and Engineering
- Civil Engineering
- Environmental Engineering
Background:
- Significant waste generation from slab stone processing (stone sludge) and aggregate washing plants (waste silt).
- Need for sustainable construction materials and effective waste management strategies.
Purpose of the Study:
- To investigate the feasibility of recycling stone sludge and waste silt into artificial aggregate.
- To optimize the production process for artificial aggregate with desirable properties.
- To evaluate the environmental and economic benefits of the proposed recycling method.
Main Methods:
- Mixing fine-powdered stone sludge with larger particle size waste silt.
- Utilizing vibratory compaction to enhance water permeability and reduce solidifying agent usage.
- Determining optimal mix proportions (35:50 stone sludge to waste silt) for densified packing.
- Applying vibratory compaction (33.3 Hz) and 28-day curing to the artificial aggregate.
Main Results:
- Produced artificial aggregate with a compact structure and water absorption rate below 0.1%.
- Achieved a compressive strength exceeding 29.4 MPa after vibratory compaction and curing.
- Demonstrated a significant increase in compressive strength (doubled) compared to uncured or uncompacted samples.
Conclusions:
- Recycling stone sludge and waste silt is a viable method for producing artificial aggregate.
- The developed artificial aggregate serves as a sustainable substitute for natural sand and stone.
- This process offers an ecological solution for managing stone sludge and silt waste.
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