Quantification of residual cement paste on recycled concrete aggregates containing limestone by selective dissolution
| Autor: | Anette Mueller, Rafael dos Santos Macedo, Carina Ulsen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Calcite
Materials science Dolomite 0211 other engineering and technologies chemistry.chemical_element 020101 civil engineering 02 engineering and technology Building and Construction Calcium Laser diffraction analysis 0201 civil engineering chemistry.chemical_compound symbols.namesake chemistry Chemical engineering 021105 building & construction symbols General Materials Science CALCÁRIO Raman spectroscopy Selectivity Thermal analysis Dissolution Civil and Structural Engineering |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0950-0618 |
| Popis: | This study proposes a new method of selective dissolution of calcium from C-S-H and CH phases by deionized water to evaluate the cement paste content in recycled concrete aggregates (RCA). The selective dissolution tests were carried out in standard phases of hydrated cement paste (HCP), calcite, dolomite and quartzite sand, and mixtures simulating RCA containing 1,5,10,20% HCP. The materials were characterized by X-ray diffractometry, thermal analysis, Raman and infrared spectroscopic analyzes, chemical analysis and laser diffraction analysis. Materials characterization indicates good selectivity of the deionized water in the calcium dissolution of the CH and C-S-H compared to limestone. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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