Research Article
Optimization of Phosphoric Acid Geopolymer Mortar Mixes for Strength and Durability using Industrial Waste Materials
@INPROCEEDINGS{10.4108/eai.28-4-2025.2357853, author={Petluru Prasanthi and Vijay Kumar Rayabharapu and Katta Charaneshwar Reddy and Vanjari Akash and Chinnam Pranay Teja and Battu Nikhil Raju}, title={Optimization of Phosphoric Acid Geopolymer Mortar Mixes for Strength and Durability using Industrial Waste Materials}, proceedings={Proceedings of the 4th International Conference on Information Technology, Civil Innovation, Science, and Management, ICITSM 2025, 28-29 April 2025, Tiruchengode, Tamil Nadu, India, Part I}, publisher={EAI}, proceedings_a={ICITSM PART I}, year={2025}, month={10}, keywords={geopolymer mortar metakaolin fly ash granite dust molarity}, doi={10.4108/eai.28-4-2025.2357853} }- Petluru Prasanthi
Vijay Kumar Rayabharapu
Katta Charaneshwar Reddy
Vanjari Akash
Chinnam Pranay Teja
Battu Nikhil Raju
Year: 2025
Optimization of Phosphoric Acid Geopolymer Mortar Mixes for Strength and Durability using Industrial Waste Materials
ICITSM PART I
EAI
DOI: 10.4108/eai.28-4-2025.2357853
Abstract
This study investigates the development of sustainable geopolymer mortar using fly ash, metakaolin, and granite dust as primary binders, activated by Phosphoric acid H3Po4. Mortar samples were prepared with varying molarities (6M, 8M, 10M, 12M, 14M, and 16M) and cast into cubes and cylinders using individual and combined material compositions. The specimens were cured at 60°C for durations of 1 and 3 days, and their compressive and tensile strengths were evaluated. Results reveal that mixes incorporating 12M and 14M molarity with 100% fly ash and granite dust achieved compressive strengths of up to 7.5 MPa. Furthermore, blends with 14M and 16M molarity combining granite dust and metakaolin attained compressive strengths exceeding 9.5 MPa. However, 100% metakaolin mixes showed reduced strength due to increased porosity from high aluminum content. Tensile strength testing of cylinders demonstrated superior performance in mixes with 12M and 16M molarity. Overall, mixes with 12M to 16M molarity exhibited optimal performance, suggesting effective geopolymer formulations for sustainable construction applications.
