Slag and Bagasse Ash: Potential Binders for Sustainable Rigid Pavement
Amardeep Boora1, Kavita Rani2, Manju Suthar3
1Department of Civil Engineering, Jaypee University of Information Technology, Waknaghat 173234, Himachal Pradesh, India.
ACS Omega
|September 18, 2023
Summary
This study explores using waste materials like sugarcane bagasse ash (SCBA), ground granulated blast furnace slag (GGBFS), and ladle furnace slag (LFS) to replace cement in concrete. Combining these materials up to 30% offers a sustainable solution for rigid pavement construction.
Area of Science:
- Civil Engineering
- Materials Science
- Environmental Engineering
Background:
- Growing demand for sustainable construction materials.
- Need to reduce carbon emissions from cement production.
- Utilization of industrial waste materials in concrete.
Purpose of the Study:
- To investigate the potential of sugarcane bagasse ash (SCBA), ground granulated blast furnace slag (GGBFS), and ladle furnace slag (LFS) as cement replacements.
- To evaluate the compressive strength of concrete incorporating these waste materials without activators.
- To explore the combined effect of these waste materials on concrete performance for rigid pavement.
Main Methods:
- Preparation of M40 grade concrete mixes with 0-35% waste material replacement.
- Compressive strength testing at 7, 14, and 28 days.
- Artificial Neural Network (ANN) modeling to predict compressive strength.
Main Results:
- Individual use of GGBFS, LFS, and SCBA is feasible up to 15%.
- LFS and SCBA can be used individually up to 20% with minimal strength reduction (≤2.63%).
- Optimal results achieved with a 30% combined replacement of cement by waste materials without compromising concrete characteristics.
Conclusions:
- Waste materials (SCBA, GGBFS, LFS) can effectively replace cement in concrete.
- Combined use of waste materials up to 30% enhances sustainability in rigid pavement construction.
- ANN models accurately predict the compressive strength of concrete with waste material incorporation.
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