Influence of metal oxide (V2O5) in recycled waste materials for advanced durable construction technology
| Autor: | Qinghua Li, Saroj Mandal, Muhammad Akbar Malik, Manas Sarkar, Moumita Maiti, Shilang Xu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Absorption of water 020209 energy Composite number Metallurgy Mullite 02 engineering and technology Building and Construction 021001 nanoscience & nanotechnology Durability law.invention Geopolymer Portland cement law Fly ash 0202 electrical engineering electronic engineering information engineering General Materials Science Cementitious 0210 nano-technology Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 171:770-778 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2018.03.231 |
| Popis: | For replacement of Portland cement as well as advancement of concrete technology, the low calcium based fly ash with alkali activators plays a significant role as cementitious material in current scenario. As efficacy of fly ash requires very high temperature (≥1400 °C) activation, alternative approach of fly-ash with addition of 5% vanadium pentoxide (V2O5) has been established for mullitization process at lower temperature (≤1000 °C) in this present exertion. The sintered fly ash has been used along with alkali activator for developing the construction composite at ambient temperature. Strength measurement, Ultrasonic pulse velocity, Chloride ion permeability, water absorption and sulphate resistant tests reveal that the V2O5 assimilated fly-ash based geopolymer structures possess higher mechanical strengths and durability. The microstructural studies (FESEM, EDS, XRD, FTIR) of the samples confirm the needle shaped nano sized mullite formation at 1000 °C temperature in its matrices. Thermal behaviour of the V2O5 based fly-ash depicted the synthesized nanoparticle was exothermic in reaction. The investigation demonstrates the formation of needle shaped mullite helps to enhance durability with higher bond strength of the composite structure and a new approach to utilize/recycle the vast resources of fly-ash with lower temperature requirement as an effective cementitious-based engineering materials. |
| Databáze: | OpenAIRE |
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