Contribution of Recycled Alumina Waste to Cement Strength and Microstructure Development
| Autor: | T. R. Boulos, Suzan S. Ibrahim, Ayman A. Hagrass, F. I. El-Hosiny, Mohamed R. Moharam, Samir I. Youssef |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Cement
Chemistry Scanning electron microscope 020209 energy technology industry and agriculture 0211 other engineering and technologies 02 engineering and technology Pozzolan Microstructure law.invention Portland cement Compressive strength law 021105 building & construction 0202 electrical engineering electronic engineering information engineering Gravimetric analysis Frost (temperature) Composite material |
| Zdroj: | International Journal of Chemistry. 10:70 |
| ISSN: | 1916-9701 1916-9698 |
| DOI: | 10.5539/ijc.v10n3p70 |
| Popis: | The role of alumina waste as a reactive pozzolan for the local Portland cement has been thoroughly investigated. The results showed that the initial and final setting times of the hardened blended pastes were reduced significantly by increasing the amount of the added alumina. In addition, the compressive strength and the hydraulic property measures of the hardened blends showed progressive improvement reaching approximately 42% and 23% after the early ages of hydration (1 and 3 days), respectively. According to such conditions, these cement blends could be applied in many concrete applications, such as high speed construction, rapid repair, frost prevention, tunneling, shoring, gas and oil well cementing, that require concrete to have rapid setting and strength development abilities.The improvement of the physico-mechanical characteristics and the hydration kinetics of the hardened blended pastes with the recycled alumina were explained after the microstructure study included the examinations of hydration product morphology and type, the thermal gravimetric (TG), the differential scanning calometry (DSC) and the differential thermo-gravimetric (DTG) thermographs analyses. The scanning electron microscope (SEM) was used to examine the microstructure and morphology of hydration products. |
| Databáze: | OpenAIRE |
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