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| 主要な著者: | , , , |
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| フォーマット: | Recurso digital |
| 言語: | |
| 出版事項: |
Zenodo
2021
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| 主題: | |
| オンライン･アクセス: | https://doi.org/10.5281/zenodo.18533991 |
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目次:
- The use of nano iron oxide ( Fe2O3 ) powder as an admixture in concrete has a lot of benefits in reducing the amount of waste requiring disposal and also provides construction materials with significant savings over new materials. Field experience have shown that concrete exposed to sulphate usually suffer from sulphate scaling above the ground level which was caused by physical sulphate attack. This physical sulphate attack over time have been confused and ignore as chemical attack. The research work presents the results of laboratory evaluation on the effect of iron powder (Fe2O3) as an additives, water to binder ratio (w/b) ratio along with various curing conditions on the performance of concrete exposed physical sulphate attack and also the performance of concrete prone environment exposed to physical sulphate attack was evaluated on the compressive strength, tensile strength, workability, and porosity of the binary blended concrete and the physical properties (visual appearance and mass loss) were experimentally investigated. The blended nano iron oxide waste were exposed to sulphate solution and the cement properties were examined. Prepared mortar specimens were cured under water for 28 days and then they were exposed to sodium sulphate solution for this purpose, Portland cement was partially replaced by 0%, 2%, 3%, and 5% by weighing of iron powder. The amount of water-binder-ratio was considered constant. The workability of the fresh composite concrete was determined using mechanical properties were determined included compressive and tensile strengths at 7, 14, and 28 days and durability evaluated by water absorption and permeable porosity. It was observed that the compressive and tensile strengths change with the replacement of iron powder by up to 5%. However, the maximum improvement was gained at 3wt% for compressive strength and 5 wt% for tensile strength. The workability of the fresh mixtures decreased when iron powder amount increased. Moreover, this present study shows the importance and benefits to improve concrete properties by using micro-particles materials.