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Study on preparation of brick blocks by using construction waste and sludge
Raguraman Vaithiyasubramanian1, Deepasree Srinivasan2, Arul Kumar Kanagarajan1
1Department of Civil Engineering, Sri Shakthi Institute of Engineering and Technology, Coimbatore, 641 105, India.
Summary
This study developed eco-friendly bricks using waste materials like sludge, construction debris, and fly ash, replacing traditional clay. The resulting bricks offer good strength and durability for construction applications.
Area of Science:
- Materials Science
- Civil Engineering
- Environmental Science
Background:
- Construction demands are increasing raw material extraction, including clay for bricks.
- Clay brick production has environmental drawbacks.
- Waste materials present an opportunity for sustainable construction alternatives.
Purpose of the Study:
- To develop clay-free brick blocks utilizing waste additives.
- To assess the feasibility of using sludge waste, construction and demolition waste, and fly ash as binding materials.
- To evaluate the environmental and mechanical benefits of these alternative brick materials.
Main Methods:
- Brick blocks were manufactured using varying proportions of sludge waste (30%, 40%, 50%), fly ash, cement, and construction and demolition waste.
- Physicochemical properties (density, water absorption, pH, shrinkage, plasticity, efflorescence, leaching) were analyzed.
- Mechanical properties (compressive strength, thermal conductivity), mineralogy, microstructure, and durability were evaluated.
Main Results:
- The developed bricks achieved a maximum compressive strength of 14.5 N/mm².
- Waste additives contributed to desired properties without compromising strength.
- Heavy metal concentrations were immobilized, and durability was influenced by compaction and temperature.
Conclusions:
- Clay-free brick blocks using sludge waste, C&D waste, and fly ash are a viable alternative to traditional bricks.
- These bricks offer comparable performance and can be implemented in various construction works.
- The study effectively utilizes waste materials, reducing environmental impact and conserving natural resources.
Keywords:
BrickConstruction and demolition wasteFiring temperatureLeachingMicrostructure analysisMix optimizationSludge wasteMore Related Videos
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