Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomography
The useful life of concrete is associated with the penetrative ability of aggressive agents on their structures. Structural parameters such as porosity, pore distribution and connectivity have great influence on the properties of mass transport in porous solids. In the present study, the effect of v...
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| Format: | Article |
| Language: | English |
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Instituto Brasileiro do Concreto (IBRACON)
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| Series: | Revista IBRACON de Estruturas e Materiais |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952013000400005&lng=en&tlng=en |
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| author | E. E. Bernardes A. G. de Magalhães W. L. Vasconcelos E. H. M. Nunes |
| author_facet | E. E. Bernardes A. G. de Magalhães W. L. Vasconcelos E. H. M. Nunes |
| author_sort | E. E. Bernardes |
| collection | DOAJ |
| description | The useful life of concrete is associated with the penetrative ability of aggressive agents on their structures. Structural parameters such as porosity, pore distribution and connectivity have great influence on the properties of mass transport in porous solids. In the present study, the effect of varying the workability of concrete in fresh state, produced through the use of additives, on pore structure and on the mechanical compressive strength of hardened concrete was assessed. The pore structure was analyzed with the aid of X-ray microtomography, and the results obtained were compared to the total pore volume calculated from data derived from helium and mercury pycnometry tests. A good approximation between the porosity values obtained through the two techniques was observed, and it was found that, regardless of concrete consistency, the samples from the surface of the specimens showed a percentage of pores higher than those taken from the more inner layers. |
| first_indexed | 2024-12-16T07:20:22Z |
| format | Article |
| id | doaj.art-1b8906daad0e458b925ed1084c852df2 |
| institution | Directory Open Access Journal |
| issn | 1983-4195 |
| language | English |
| last_indexed | 2024-12-16T07:20:22Z |
| publisher | Instituto Brasileiro do Concreto (IBRACON) |
| record_format | Article |
| series | Revista IBRACON de Estruturas e Materiais |
| spelling | doaj.art-1b8906daad0e458b925ed1084c852df22022-12-21T22:39:39ZengInstituto Brasileiro do Concreto (IBRACON)Revista IBRACON de Estruturas e Materiais1983-41956458259710.1590/S1983-41952013000400005S1983-41952013000400005Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomographyE. E. Bernardes0A. G. de Magalhães1W. L. Vasconcelos2E. H. M. Nunes3Universidade Federal de Minas GeraisUniversidade Federal de Minas GeraisUniversidade Federal de Minas GeraisUniversidade Federal de Minas GeraisThe useful life of concrete is associated with the penetrative ability of aggressive agents on their structures. Structural parameters such as porosity, pore distribution and connectivity have great influence on the properties of mass transport in porous solids. In the present study, the effect of varying the workability of concrete in fresh state, produced through the use of additives, on pore structure and on the mechanical compressive strength of hardened concrete was assessed. The pore structure was analyzed with the aid of X-ray microtomography, and the results obtained were compared to the total pore volume calculated from data derived from helium and mercury pycnometry tests. A good approximation between the porosity values obtained through the two techniques was observed, and it was found that, regardless of concrete consistency, the samples from the surface of the specimens showed a percentage of pores higher than those taken from the more inner layers.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952013000400005&lng=en&tlng=enconcreteworkabilityporosityX-ray microtomography |
| spellingShingle | E. E. Bernardes A. G. de Magalhães W. L. Vasconcelos E. H. M. Nunes Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomography Revista IBRACON de Estruturas e Materiais concrete workability porosity X-ray microtomography |
| title | Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomography |
| title_full | Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomography |
| title_fullStr | Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomography |
| title_full_unstemmed | Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomography |
| title_short | Evaluation of the effect of varying the workability in concrete pore structure by using X-ray microtomography |
| title_sort | evaluation of the effect of varying the workability in concrete pore structure by using x ray microtomography |
| topic | concrete workability porosity X-ray microtomography |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952013000400005&lng=en&tlng=en |
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