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Development of Eco-Friendly Concrete Mix Using Recycled Aggregates: Structural Performance and Pore Feature Study
Plaban Deb1, Barnali Debnath2, Murtaza Hasan1
1Department of Civil Engineering, Chandigarh University, Mohali 140413, Punjab, India.
Materials (Basel, Switzerland)
|April 23, 2022
Summary
Recycled brick aggregates (RBA) can be used to create eco-friendly pervious concrete (PC). Replacing 40-60% of natural aggregates with RBA maintains concrete strength and pore structure, offering a sustainable construction solution.
Area of Science:
- Civil Engineering
- Materials Science
- Environmental Engineering
Background:
- Growing demand for construction materials leads to natural aggregate depletion.
- Construction and demolition waste poses significant environmental and land-use challenges.
- Recycling waste materials offers a sustainable solution to aggregate shortages and waste management.
Purpose of the Study:
- To develop eco-friendly pervious concrete (PC) using recycled brick aggregates (RBA).
- To investigate the structural performance of PC with RBA.
- To analyze the pore structure distribution in PC incorporating RBA.
Main Methods:
- Laboratory testing of pervious concrete mixes.
- Utilizing image processing techniques for pore structure analysis.
- Evaluating the effects of varying RBA replacement ratios (0-100%) and particle sizes (4.75-12.5 mm).
Main Results:
- The smallest aggregate size (4.75 mm) yielded the highest concrete strength.
- Pore sizes ranged from 1.8-2 mm for 4.75 mm aggregates, 2.9-3.1 mm for 9.5 mm, and 3.7-4.2 mm for 12.5 mm aggregates.
- Optimal RBA replacement levels of 40-60% did not negatively impact concrete strength or pore characteristics.
Conclusions:
- Recycled brick aggregates are a viable alternative to natural aggregates in pervious concrete.
- Pervious concrete with 40-60% RBA replacement demonstrates comparable structural performance and pore characteristics.
- This approach effectively addresses natural aggregate scarcity and construction waste management issues.
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