A new method to determine the density and water absorption of fine recycled aggregates
The construction industry keeps on demanding huge quantities of natural resources, mainly minerals for mortars and concrete production. The depletion of many quarries and environmental concerns about reducing the dumping of construction and demolition waste in quarries have led to an increase in the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2013-01-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013005000074 |
| _version_ | 1818990837309112320 |
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| author | Fernando Rodrigues Luís Evangelista Jorge de Brito |
| author_facet | Fernando Rodrigues Luís Evangelista Jorge de Brito |
| author_sort | Fernando Rodrigues |
| collection | DOAJ |
| description | The construction industry keeps on demanding huge quantities of natural resources, mainly minerals for mortars and concrete production. The depletion of many quarries and environmental concerns about reducing the dumping of construction and demolition waste in quarries have led to an increase in the procuring and use of recycled aggregates from this type of waste. If they are to be incorporated in concrete and mortars it is essential to know their properties to guarantee the adequate performance of the end products, in both mechanical and durability-related terms. Existing regulated tests were developed for natural aggregates, however, and several problems arise when they are applied to recycled aggregates, especially fine recycled aggregates (FRA). This paper describes the main problems encountered with these tests and proposes an alternative method to determine the density and water absorption of FRA that removes them. The use of sodium hexametaphosphate solutions in the water absorption test has proven to improve its efficiency, minimizing cohesion between particles and helping to release entrained air. |
| first_indexed | 2024-12-20T20:00:43Z |
| format | Article |
| id | doaj.art-29908b4eeb024ae3acffc70c97fc8560 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-20T20:00:43Z |
| publishDate | 2013-01-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-29908b4eeb024ae3acffc70c97fc85602022-12-21T19:28:04ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392013-01-01ahead0A new method to determine the density and water absorption of fine recycled aggregatesFernando RodriguesLuís EvangelistaJorge de BritoThe construction industry keeps on demanding huge quantities of natural resources, mainly minerals for mortars and concrete production. The depletion of many quarries and environmental concerns about reducing the dumping of construction and demolition waste in quarries have led to an increase in the procuring and use of recycled aggregates from this type of waste. If they are to be incorporated in concrete and mortars it is essential to know their properties to guarantee the adequate performance of the end products, in both mechanical and durability-related terms. Existing regulated tests were developed for natural aggregates, however, and several problems arise when they are applied to recycled aggregates, especially fine recycled aggregates (FRA). This paper describes the main problems encountered with these tests and proposes an alternative method to determine the density and water absorption of FRA that removes them. The use of sodium hexametaphosphate solutions in the water absorption test has proven to improve its efficiency, minimizing cohesion between particles and helping to release entrained air.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013005000074fine recycled aggregatesdensitywater absorption |
| spellingShingle | Fernando Rodrigues Luís Evangelista Jorge de Brito A new method to determine the density and water absorption of fine recycled aggregates Materials Research fine recycled aggregates density water absorption |
| title | A new method to determine the density and water absorption of fine recycled aggregates |
| title_full | A new method to determine the density and water absorption of fine recycled aggregates |
| title_fullStr | A new method to determine the density and water absorption of fine recycled aggregates |
| title_full_unstemmed | A new method to determine the density and water absorption of fine recycled aggregates |
| title_short | A new method to determine the density and water absorption of fine recycled aggregates |
| title_sort | new method to determine the density and water absorption of fine recycled aggregates |
| topic | fine recycled aggregates density water absorption |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013005000074 |
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