Preparation and Characterization of New Geopolymer-Epoxy Resin Hybrid Mortars
Abstract
:1. Introduction
2. Results and Discussion
2.1. Preparation Method
2.2. Characterization
2.2.1. Microstructural Analysis
2.2.2. Thermal Analysis (TGA/DSC)
2.2.3. Water Absorption
Mixtures | WAC (%) | Decrease |
---|---|---|
G66 | 2.45 | 1 |
L66 | 1.34 | 0.45 |
E66 | 1.05 | 0.22 |
2.2.4. Pore Structure Characterization
2.2.5. Compressive Strength Determination
2.2.6. Stress-Strain Response
Mixtures | εult a | σult b (MPa) | εsps c | σsps d (MPa) |
---|---|---|---|---|
L66 | 0.0044 | 44.16 | 0.0016 | 61.89 |
E66 | 0.0028 | 40.09 | 0.0013 | 58.03 |
G66 | 0.0018 | 35.84 | 0.0012 | 43.16 |
3. Materials and Methodology
3.1. Materials and Design
3.1.1. Materials
Mixtures | Values | Relevant regulation |
---|---|---|
Sand equivalent (%) | 97 | EN 933-8 |
Apparent density (g/cm3) | 2.59 | MIP |
Bulk density (g/cm3) | 1.64 | ISO 6782 |
Water absorption (%) | 1.10 | ISO 7033 |
Fineness modulus | 2.70 | UNI EN 12620 |
3.1.2. Preparation of the Specimens
Preparation of the Geopolymeric Mortars (G33/G66)
Preparation of The Hybrid Geopolymeric Mortars (E33/E66/L33/L66)
System | Sodium hydroxide | Sodium silicate solution | MK | Epojet | EpojetLV | Sand |
---|---|---|---|---|---|---|
G * | 8.3 | 50.0 | 41.7 | – | – | – |
G33 | 5.6 | 33.1 | 28.0 | – | – | 33.3 |
G66 | 2.8 | 16.6 | 14.0 | – | – | 66.6 |
E * | 6.7 | 40.0 | 33.3 | 20.0 | – | – |
E33 | 4.4 | 26.8 | 22.1 | 13.4 | – | 33.3 |
E66 | 2.2 | 13.4 | 11.1 | 6.7 | – | 66.6 |
L * | 6.7 | 40.0 | 33.3 | – | 20.0 | – |
L33 | 4.4 | 26.8 | 22.1 | – | 13.4 | 33.3 |
L66 | 2.2 | 13.4 | 11.1 | – | 6.7 | 66.6 |
3.2. Analytical Techniques
4. Conclusions
- Improved strength: the polymer-modified mortars have improved compressive strength in comparison with unmodified ones. Furthermore, the polymer in the mortar helps restrain micro-crack propagation, which improves the overall toughness of the mortar.
- The total porosity decreases with the addition of the organic polymer. This may contribute to improve gas and water impermeability and consequently the durability.
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Colangelo, F.; Roviello, G.; Ricciotti, L.; Ferone, C.; Cioffi, R. Preparation and Characterization of New Geopolymer-Epoxy Resin Hybrid Mortars. Materials 2013, 6, 2989-3006. https://doi.org/10.3390/ma6072989
Colangelo F, Roviello G, Ricciotti L, Ferone C, Cioffi R. Preparation and Characterization of New Geopolymer-Epoxy Resin Hybrid Mortars. Materials. 2013; 6(7):2989-3006. https://doi.org/10.3390/ma6072989
Chicago/Turabian StyleColangelo, Francesco, Giuseppina Roviello, Laura Ricciotti, Claudio Ferone, and Raffaele Cioffi. 2013. "Preparation and Characterization of New Geopolymer-Epoxy Resin Hybrid Mortars" Materials 6, no. 7: 2989-3006. https://doi.org/10.3390/ma6072989