Characterization of test specimens produced in reduced size for X-ray microtomography (µ-CT) tests
| Autor: | Edgar Vladimiro Mantilla Carrasco, L. B. De Lima, Wander L. Vasconcelos, A. G. De Magalhães, E. E. Bernardes, Eduardo Nunes |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
X-ray microtomography[/kwd]
[kwd]fractionation of samples[/kwd] [kwd]test specimen[/kwd] [kwd]pycnometry[/kwd] [kwd]pore structure 021105 building & construction 0211 other engineering and technologies 02 engineering and technology General Medicine 021001 nanoscience & nanotechnology 0210 nano-technology microtomografia de raios X[/kwd] [kwd]fracionamento de amostras corpo de prova picnometria estrutura de poros lcsh:TH1-9745 lcsh:Building construction |
| Zdroj: | Revista IBRACON de Estruturas e Materiais, Vol 10, Iss 5, Pp 1025-1041 Revista IBRACON de Estruturas e Materiais v.10 n.5 2017 Revista IBRACON de Estruturas e Materiais Instituto Brasileiro do Concreto (IBRACON) instacron:IBRACON |
| ISSN: | 1983-4195 |
| Popis: | The need to use reduced sample sizes, in order to attain improved spatial resolution in (µ-CT) tests applied in Portland cement composites, makes researchers perform the fractionation of materials to obtain samples with dimensions compatible with the capacity of the scanning equipment, which might cause alterations in the microstructure under analysis. Therefore, a test specimen (TS) with dimensions compatible with the scanning capacity of a microtomography system that operates with an X-ray tube and voltage ranging from 20 to 100 kV was proposed. Axial compression strength tests were made and their total porosity was assessed by an apparent density and solid fraction density ratio, which were obtained by means of mercury and helium pycnometry and µ-CT technique, respectively. The adoption of that TS has shown to be viable for providing a sample with a higher level of representation. |
| Databáze: | OpenAIRE |
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