Leaching of alkali-activated tungsten mining waste materials by electrical conductivity and DRX
| Autor: | Ana Paula Morais Fernandes, Manuel Magrinho, João Castro-Gomes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Metallurgy 0211 other engineering and technologies chemistry.chemical_element 020101 civil engineering 02 engineering and technology Tungsten 0201 civil engineering chemistry Electrical resistivity and conductivity lcsh:TA1-2040 021105 building & construction Alkali activated Leaching (metallurgy) lcsh:Engineering (General). Civil engineering (General) |
| Zdroj: | MATEC Web of Conferences, Vol 274, p 02002 (2019) MATEC Web of Conferences |
| Popis: | The production of Portland cement leads to high energy and natural resource consumption, as well as relevant emission of CO2 into the atmosphere. Thus, this research work intends to contribute to the study of Portland cement alternative alkali activated binders, which utilization can contribute to counteract to this status. Different samples of alkaline activated binders using different combinations of tungsten mining waste from Panasqueira Mines, milled glass and metakaolin were made. Compression tests were performed at 3, 7, 14 and 28 days of curing. For evaluating reactivity chemical leaching was measured. For such, conductivity tests were carried out simultaneously with pH measurement, SEM-BSE and ATR-FTIR analysis. Electrical conductivity tests enabled to preliminary identify the chemical leaching for different precursors. Additionally, by SEM-BSE it was possible to observed reacted and nonreacted particles, and the reactivity extend was confirmed by ATR-FTIR. |
| Databáze: | OpenAIRE |
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