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Enhancing the Mechanical Properties of Historical Masonry Using Fiber-Reinforced Geopolymers
Ithan Jessemar R Dollente1, Daniel Nichol R Valerio2, Pauline Rose J Quiatchon1
1Center for Engineering and Sustainable Development Research, De La Salle University, Manila 1004, Philippines.
Polymers
|February 28, 2023
Summary
This study explores sustainable construction materials for historic structures. Polyvinyl alcohol and stainless-steel fibers in geopolymer concrete show promising mechanical properties for retrofitting applications.
Area of Science:
- Materials Science
- Civil Engineering
- Sustainable Construction
Background:
- Geopolymer technology offers a sustainable alternative to traditional concrete for construction.
- Fiber reinforcement in geopolymers can reduce embodied carbon and enhance material properties.
- Historic structures require specialized retrofitting materials that are compatible with local resources.
Purpose of the Study:
- To develop and evaluate fly ash-based geopolymer composites reinforced with various fibers.
- To determine the optimal fiber type and content for enhancing geopolymer mechanical performance.
- To assess the suitability of these novel materials for retrofitting historic structures.
Main Methods:
- Preparation of 28 geopolymer mortar mixes with six different fiber types: polyvinyl alcohol, polypropylene, chopped basalt, carbon fiber, and copper-coated stainless steel.
- Evaluation of mechanical properties including compressive strength, split-tensile strength, and modulus of elasticity.
- Statistical analysis using one-way ANOVA to verify performance differences.
Main Results:
- Polyvinyl alcohol and copper-coated stainless-steel fibers significantly improved mechanical properties and fracture toughness.
- Polypropylene fibers resulted in lower mechanical performance compared to the control geopolymer mortar.
- Geopolymer composites demonstrated potential as reinforcement materials for structural applications.
Conclusions:
- Polyvinyl alcohol and stainless-steel fibers are viable options for reinforcing geopolymer composites in historic structures.
- Further research and optimization are necessary before widespread application in retrofitting historic buildings.
- Geopolymer technology presents a sustainable pathway for the conservation and strengthening of heritage assets.
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