| Autor: |
Carlos Hoffmann Sampaio, Bogdan Grigore Cazacliu, Weslei Monteiro Ambrós, Márcio André Kronbauer, Rejane M. C. Tubino, Denise C. C. Dal Molin, Josep Oliva Moncunill, Gérson L. Miltzarek, Regis P. Waskow, Viviane L. G. dos Santos, Luis F. O. Silva |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Minerals, Vol 11, Iss 8, p 803 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2075-163X |
| DOI: |
10.3390/min11080803 |
| Popis: |
This paper presents a physical characterization for the recycling into new concretes of three comminuted concretes: C16/20 (“ordinary concrete”), C50/60 (“high strength concrete”), and C70/85 (“very high strength concrete”). The top size of the crushed concretes was 19.1 mm and the size range was 4.75 to 19.1 mm. The characterization was carried out with coarse aggregate liberation, to be prepared and concentrated in a gravity concentration process. The density distribution of the coarse aggregate, cement paste, and sand was carried out in different size ranges (4.75/19.1 mm; 4.75/8.0 mm; 8.0/12.5 mm; and 12.5/19.1 mm) for the three concretes studied. The form factor of the samples, as well as the porosity determination of particles in different density ranges, are presented. The obtained results indicate that the coarse aggregate liberation was more intensive for the low resistance concrete (C16/20), but a reasonable coarse aggregate recovery is possible for all concretes. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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